Version May 2024
Insomnia and pain, occasional:
Note: Routine use is not recommended (Ref). When used, limit long-term use (>4 weeks) to cases for which nonpharmacologic treatments are not available or not effective and benefits are felt to outweigh risks (Ref).
Oral: Naproxen sodium 220 mg/diphenhydramine 25 mg: 2 tablets at bedtime (maximum dose: 2 tablets [naproxen sodium 440 mg/diphenhydramine 50 mg] in 24 hours).
Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.
CrCl ≥30 mL/minute: There are no dosage adjustments provided in the manufacturer's labeling; use with caution and consider using a reduced dose.
CrCl <30 mL/minute: Use is not recommended; avoid use in patients with advanced renal disease.
Hemodialysis: Not dialyzable (Ref).
KDIGO 2012 guidelines provide the following recommendations for nonsteroidal anti-inflammatory drugs:
eGFR 30 to <60 mL/minute/1.73 m2: Temporarily discontinue in patients with intercurrent disease that increases risk of acute kidney injury.
eGFR <30 mL/minute/1.73 m2: Avoid use.
There are no dosage adjustments provided in the manufacturer's labeling; use with caution to avoid adverse effects and discontinue if hepatic function worsens.
Avoid use (Ref).
Insomnia and pain: Children ≥12 years and Adolescents: Oral: Refer to adult dosing.
There are no dosage adjustments provided in the manufacturer’s labeling; use with caution. See individual agents.
There are no dosage adjustments provided in the manufacturer’s labeling; use with caution. See individual agents.
See individual agents.
OTC labeling: When used for self-medication, do not use if allergic to any other pain reliever/fever reducer; inadequate time for a full night's sleep; children younger than 12 years; immediately before or after heart surgery; use with any other product containing diphenhydramine (including topical routes); sleeplessness without pain
Concerns related to adverse effects:
• Allergic reactions: May cause severe allergic reactions especially in people allergic to aspirin; symptoms may include: Asthma (wheezing), blisters, facial swelling, hives, rash, shock, skin reddening. Discontinue use in patients who develop an allergic reaction and seek immediate treatment.
• CNS depression: May cause CNS depression, which may impair physical or mental abilities; patients must be cautioned about performing tasks that require mental alertness (eg, operating machinery or driving).
• Drug reaction with eosinophilia and systemic symptoms: Potentially serious, sometimes fatal, drug reaction with eosinophilia and systemic symptoms (DRESS), also known as multiorgan hypersensitivity reactions, has been reported with nonsteroidal anti-inflammatory drugs (NSAIDs). Monitor for signs and symptoms (eg, fever, rash, lymphadenopathy, eosinophilia) in association with other organ system involvement (eg, hepatitis, nephritis, hematological abnormalities, myocarditis, myositis). Early symptoms of hypersensitivity reaction (eg, lymphadenopathy, fever) may occur without rash; discontinue therapy and further evaluate if DRESS is suspected.
• GI events: NSAIDs may increase risk of GI irritation, inflammation, ulceration, bleeding, and perforation. These events can be fatal and may occur at any time during therapy and without warning. Use caution with a history of GI disease (bleeding or ulcers); concurrent therapy with aspirin, anticoagulants, and/or corticosteroids; smoking; use of alcohol (≥3 alcoholic beverages/day); the elderly; or debilitated patients. Use the lowest effective dose for the shortest duration of time, consistent with individual patient goals, to reduce risk of GI adverse events; alternate therapies should be considered for patients at high risk. In patients with a history of acute lower GI bleeding, avoid use of non-aspirin NSAIDs, especially if due to angioectasia or diverticulosis (Strate 2016).
• Skin reactions: NSAIDs may cause serious skin adverse events; discontinue at the first sign of skin rash or hypersensitivity.
Disease-related concerns:
• Aseptic meningitis: May increase the risk of aseptic meningitis, especially in patients with systemic lupus erythematosus (SLE) and mixed connective tissue disorders.
• Bariatric surgery: Gastric ulceration: Avoid chronic use of oral nonselective NSAIDs after bariatric surgery; development of anastomotic ulcerations/perforations may occur (Bhangu 2014; Mechanick 2020). Short-term use of celecoxib or IV ketorolac are recommended as part of a multimodal pain management strategy for postoperative pain (Chou 2016; Horsley 2019; Thorell 2016).
• Cardiovascular disease: NSAIDs are associated with an increased risk of adverse cardiovascular events. Avoid use in heart failure (FDA 2015). Use with caution in patients with cardiovascular disease, hypertension, or in patients taking a diuretic; do not use right before or after heart surgery. Use the lowest effective dose for the shortest duration of time to reduce risk of cardiovascular events; alternate therapies should be considered for patients at high risk.
• Hepatic impairment: Use with caution in patients with hepatic impairment; reduced doses may be required due to extensive hepatic metabolism. Patients with advanced hepatic disease are at an increased risk of GI bleeding and kidney failure with NSAIDs (AASLD [Biggins 2021]; AASLD [Runyon 2013]).
• Increased intraocular pressure/glaucoma: Use with caution in patients with increased intraocular pressure or angle-closure glaucoma.
• Prostatic hyperplasia/urinary obstruction: Use with caution in patients with prostatic hyperplasia and/or GU obstruction.
• Pyloroduodenal obstruction: Use with caution in patients with pyloroduodenal obstruction (including stenotic peptic ulcer).
• Renal impairment: Use with caution in patients with renal impairment.
• Respiratory disease: Use with caution in patients with asthma, emphysema, or chronic bronchitis.
• Thyroid dysfunction: Use with caution in patients with thyroid dysfunction.
Special populations:
• Pediatric: Not for self-medication (OTC use) in children <12 years. Antihistamines may cause excitation in young children.
Other warnings/precautions:
• Self-medication (OTC use): Should only be used when a full night’s sleep is anticipated. Avoid use if not experiencing pain in addition to insomnia. Consult a health care provider if pain lasts >10 days or insomnia lasts >14 days.
No
Oral: Administer each dose with a full glass of water; if stomach upset occurs, administer with food or milk. If taken with food, onset of effect may be delayed.
Oral: Administer each dose with a full glass of water at bedtime; if stomach upset occurs, administer with food or milk. If taken with food, onset of effect may be delayed.
Insomnia and pain, occasional: Relief of occasional sleeplessness associated with minor aches and pains.
Limitations of use: American Academy of Sleep Medicine guidelines for the treatment of chronic insomnia suggest diphenhydramine not be used for sleep-onset or sleep-maintenance insomnia in adults due to the absence of evidence for clinically significant improvement (AASM [Sateia 2017]). The US Department of Veterans Affairs/Department of Defense guidelines for the chronic management of insomnia disorder and obstructive sleep apnea suggest against the use of diphenhydramine for chronic insomnia (VA/DoD 2019).
Beers Criteria: Diphenhydramine (oral), a first-generation antihistamine, is identified in the Beers Criteria as a potentially inappropriate medication to be avoided in patients 65 years and older (independent of diagnosis or condition) due to its potent anticholinergic properties resulting in increased risk of confusion, dry mouth, constipation, and other anticholinergic effects or toxicity; use should also be avoided due to reduced clearance with advanced age and tolerance associated with use as a hypnotic. Exposure to concurrent anticholinergic drugs also increases risk of falls, delirium, and dementia; consider total anticholinergic burden when conducting medication reviews. However, use of diphenhydramine may be appropriate in certain situations such as acute treatment of severe allergic reaction (Beers Criteria [AGS 2023]).
Beers Criteria: Naproxen is identified in the Beers Criteria as a potentially inappropriate medication to be avoided for chronic use in patients 65 years and older (unless alternative agents ineffective and patient can receive concomitant gastroprotective agent) due to increased risk of GI bleeding and peptic ulcer disease in older adults in high-risk category (eg, older than 75 years or receiving concomitant oral/parenteral corticosteroids, anticoagulants, or antiplatelet agents). In addition, avoid for short-term scheduled use in combination with oral/parenteral corticosteroids, anticoagulants, or antiplatelet agents unless alternatives are ineffective and patient can receive concomitant gastroprotective agent (Beers Criteria [AGS 2023]).
Refer to individual components.
Note: Interacting drugs may not be individually listed below if they are part of a group interaction (eg, individual drugs within “CYP3A4 Inducers [Strong]” are NOT listed). For a complete list of drug interactions by individual drug name and detailed management recommendations, use the Lexicomp drug interactions program by clicking on the “Launch drug interactions program” link above.
5-Aminosalicylic Acid Derivatives: Nonsteroidal Anti-Inflammatory Agents may enhance the nephrotoxic effect of 5-Aminosalicylic Acid Derivatives. Risk C: Monitor therapy
Abrocitinib: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may enhance the antiplatelet effect of Abrocitinib. Risk X: Avoid combination
Acalabrutinib: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Acemetacin: May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid combination
Acetylcholinesterase Inhibitors: May diminish the therapeutic effect of Anticholinergic Agents. Anticholinergic Agents may diminish the therapeutic effect of Acetylcholinesterase Inhibitors. Risk C: Monitor therapy
Aclidinium: May enhance the anticholinergic effect of Anticholinergic Agents. Risk X: Avoid combination
Agents with Antiplatelet Properties (e.g., P2Y12 inhibitors, NSAIDs, SSRIs, etc.): May enhance the antiplatelet effect of other Agents with Antiplatelet Properties. Risk C: Monitor therapy
Alcohol (Ethyl): CNS Depressants may enhance the CNS depressant effect of Alcohol (Ethyl). Risk C: Monitor therapy
Alcohol (Ethyl): May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of GI bleeding may be increased with this combination. Risk C: Monitor therapy
Aliskiren: Nonsteroidal Anti-Inflammatory Agents may diminish the antihypertensive effect of Aliskiren. Nonsteroidal Anti-Inflammatory Agents may enhance the nephrotoxic effect of Aliskiren. Risk C: Monitor therapy
Alizapride: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Amantadine: May enhance the anticholinergic effect of Anticholinergic Agents. Risk C: Monitor therapy
Amezinium: Antihistamines may enhance the stimulatory effect of Amezinium. Risk C: Monitor therapy
Aminoglycosides: Nonsteroidal Anti-Inflammatory Agents may decrease the excretion of Aminoglycosides. Data only in premature infants. Risk C: Monitor therapy
Aminolevulinic Acid (Systemic): Photosensitizing Agents may enhance the photosensitizing effect of Aminolevulinic Acid (Systemic). Risk X: Avoid combination
Aminolevulinic Acid (Topical): Photosensitizing Agents may enhance the photosensitizing effect of Aminolevulinic Acid (Topical). Risk C: Monitor therapy
Anagrelide: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Angiotensin II Receptor Blockers: May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Specifically, the combination may result in a significant decrease in renal function. Nonsteroidal Anti-Inflammatory Agents may diminish the therapeutic effect of Angiotensin II Receptor Blockers. The combination of these two agents may also significantly decrease glomerular filtration and renal function. Risk C: Monitor therapy
Angiotensin-Converting Enzyme Inhibitors: May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Specifically, the combination may result in a significant decrease in renal function. Nonsteroidal Anti-Inflammatory Agents may diminish the antihypertensive effect of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor therapy
Anticholinergic Agents: May enhance the adverse/toxic effect of other Anticholinergic Agents. Risk C: Monitor therapy
Anticoagulants: Agents with Antiplatelet Properties may enhance the anticoagulant effect of Anticoagulants. Risk C: Monitor therapy
Apixaban: Naproxen may enhance the adverse/toxic effect of Apixaban. Specifically, the risk for bleeding may be increased. Naproxen may increase the serum concentration of Apixaban. Management: A comprehensive risk to benefit assessment should be done for all patients before any concurrent use of apixaban and naproxen. If combined, monitor patients extra closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Azelastine (Nasal): May enhance the CNS depressant effect of CNS Depressants. Risk X: Avoid combination
Bemiparin: Nonsteroidal Anti-Inflammatory Agents may enhance the anticoagulant effect of Bemiparin. Management: Avoid concomitant use of bemiparin and nonsteroidal anti-inflammatory agents (NSAIDs) due to the increased risk of bleeding. If concomitant use is unavoidable, monitor closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Bemiparin: Agents with Antiplatelet Properties may enhance the anticoagulant effect of Bemiparin. Management: Avoid concomitant use of bemiparin with antiplatelet agents. If concomitant use is unavoidable, monitor closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Benzylpenicilloyl Polylysine: Antihistamines may diminish the diagnostic effect of Benzylpenicilloyl Polylysine. Management: Suspend systemic H1 antagonists for benzylpenicilloyl-polylysine skin testing and delay testing until systemic antihistaminic effects have dissipated. A histamine skin test may be used to assess persistent antihistaminic effects. Risk D: Consider therapy modification
Beta-Blockers: Nonsteroidal Anti-Inflammatory Agents may diminish the antihypertensive effect of Beta-Blockers. Risk C: Monitor therapy
Betahistine: Antihistamines may diminish the therapeutic effect of Betahistine. Betahistine may diminish the therapeutic effect of Antihistamines. Risk C: Monitor therapy
Bile Acid Sequestrants: May decrease the absorption of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor therapy
Bisphosphonate Derivatives: Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of Bisphosphonate Derivatives. Both an increased risk of gastrointestinal ulceration and an increased risk of nephrotoxicity are of concern. Risk C: Monitor therapy
Blonanserin: CNS Depressants may enhance the CNS depressant effect of Blonanserin. Management: Use caution if coadministering blonanserin and CNS depressants; dose reduction of the other CNS depressant may be required. Strong CNS depressants should not be coadministered with blonanserin. Risk D: Consider therapy modification
Botulinum Toxin-Containing Products: May enhance the anticholinergic effect of Anticholinergic Agents. Risk C: Monitor therapy
Brexanolone: CNS Depressants may enhance the CNS depressant effect of Brexanolone. Risk C: Monitor therapy
Brimonidine (Topical): May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Bromopride: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Bromperidol: May enhance the CNS depressant effect of CNS Depressants. Risk X: Avoid combination
Buprenorphine: CNS Depressants may enhance the CNS depressant effect of Buprenorphine. Management: Consider reduced doses of other CNS depressants, and avoiding such drugs in patients at high risk of buprenorphine overuse/self-injection. Initiate buprenorphine at lower doses in patients already receiving CNS depressants. Risk D: Consider therapy modification
Cannabinoid-Containing Products: Anticholinergic Agents may enhance the tachycardic effect of Cannabinoid-Containing Products. Risk C: Monitor therapy
Cannabinoid-Containing Products: CNS Depressants may enhance the CNS depressant effect of Cannabinoid-Containing Products. Risk C: Monitor therapy
Caplacizumab: Agents with Antiplatelet Properties may enhance the adverse/toxic effect of Caplacizumab. Specifically, the risk of bleeding may be increased. Management: Avoid coadministration of caplacizumab with antiplatelets if possible. If coadministration is required, monitor closely for signs and symptoms of bleeding. Interrupt use of caplacizumab if clinically significant bleeding occurs. Risk D: Consider therapy modification
Cephalothin: Agents with Antiplatelet Properties may enhance the adverse/toxic effect of Cephalothin. Specifically, the risk for bleeding may be increased. Risk C: Monitor therapy
Chloral Betaine: May enhance the adverse/toxic effect of Anticholinergic Agents. Risk C: Monitor therapy
Chlormethiazole: May enhance the CNS depressant effect of CNS Depressants. Management: Monitor closely for evidence of excessive CNS depression. The chlormethiazole labeling states that an appropriately reduced dose should be used if such a combination must be used. Risk D: Consider therapy modification
Chlorphenesin Carbamate: May enhance the adverse/toxic effect of CNS Depressants. Risk C: Monitor therapy
Chlorprothixene: Anticholinergic Agents may enhance the anticholinergic effect of Chlorprothixene. Risk C: Monitor therapy
Cimetropium: Anticholinergic Agents may enhance the anticholinergic effect of Cimetropium. Risk X: Avoid combination
CloZAPine: Anticholinergic Agents may enhance the constipating effect of CloZAPine. Management: Consider alternatives to this combination whenever possible. If combined, monitor closely for signs and symptoms of gastrointestinal hypomotility and consider prophylactic laxative treatment. Risk D: Consider therapy modification
CNS Depressants: May enhance the adverse/toxic effect of other CNS Depressants. Risk C: Monitor therapy
Collagenase (Systemic): Agents with Antiplatelet Properties may enhance the adverse/toxic effect of Collagenase (Systemic). Specifically, the risk of injection site bruising and or bleeding may be increased. Risk C: Monitor therapy
Corticosteroids (Systemic): May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Risk C: Monitor therapy
CycloSPORINE (Systemic): Nonsteroidal Anti-Inflammatory Agents may enhance the nephrotoxic effect of CycloSPORINE (Systemic). Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of CycloSPORINE (Systemic). CycloSPORINE (Systemic) may increase the serum concentration of Nonsteroidal Anti-Inflammatory Agents. Management: Consider alternatives to nonsteroidal anti-inflammatory agents (NSAIDs). Monitor for evidence of nephrotoxicity, as well as increased serum cyclosporine concentrations and systemic effects (eg, hypertension) during concomitant therapy with NSAIDs. Risk D: Consider therapy modification
Dabigatran Etexilate: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may enhance the adverse/toxic effect of Dabigatran Etexilate. Specifically, the risk of bleeding may be increased. Management: A comprehensive risk to benefit assessment should be done for all patients before any concurrent use of dabigatran and nonsteroidal anti-inflammatory drugs (NSAIDs). If combined, monitor patients extra closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Daridorexant: May enhance the CNS depressant effect of CNS Depressants. Management: Dose reduction of daridorexant and/or any other CNS depressant may be necessary. Use of daridorexant with alcohol is not recommended, and the use of daridorexant with any other drug to treat insomnia is not recommended. Risk D: Consider therapy modification
Dasatinib: May enhance the anticoagulant effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Deferasirox: Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of Deferasirox. Specifically, the risk for GI ulceration/irritation or GI bleeding may be increased. Risk C: Monitor therapy
Deoxycholic Acid: Agents with Antiplatelet Properties may enhance the adverse/toxic effect of Deoxycholic Acid. Specifically, the risk for bleeding or bruising in the treatment area may be increased. Risk C: Monitor therapy
Desmopressin: Nonsteroidal Anti-Inflammatory Agents may enhance the hyponatremic effect of Desmopressin. Risk C: Monitor therapy
DexmedeTOMIDine: CNS Depressants may enhance the CNS depressant effect of DexmedeTOMIDine. Management: Monitor for increased CNS depression during coadministration of dexmedetomidine and CNS depressants, and consider dose reductions of either agent to avoid excessive CNS depression. Risk D: Consider therapy modification
Difelikefalin: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Diflunisal: May enhance the adverse/toxic effect of Naproxen. Specifically, the risk for gastrointestinal toxicity may be increased. Diflunisal may enhance the antiplatelet effect of Naproxen. Diflunisal may decrease the excretion of Naproxen. Risk X: Avoid combination
Digoxin: Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of Digoxin. Risk C: Monitor therapy
Dimethindene (Topical): May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Disulfiram: May enhance the adverse/toxic effect of Products Containing Ethanol. Management: Do not use disulfiram with dosage forms that contain ethanol. Risk X: Avoid combination
Doxylamine: CNS Depressants may enhance the CNS depressant effect of Doxylamine. Risk C: Monitor therapy
DroPERidol: May enhance the CNS depressant effect of CNS Depressants. Management: Consider dose reductions of droperidol or of other CNS agents (eg, opioids, barbiturates) with concomitant use. Risk D: Consider therapy modification
Drospirenone-Containing Products: May enhance the hyperkalemic effect of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor therapy
Edoxaban: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may enhance the adverse/toxic effect of Edoxaban. Specifically, the risk of bleeding may be increased. Management: A comprehensive risk to benefit assessment should be done for all patients before any concurrent use of edoxaban and nonsteroidal anti-inflammatory drugs (NSAIDs). If combined, monitor patients extra closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Eluxadoline: Anticholinergic Agents may enhance the constipating effect of Eluxadoline. Risk X: Avoid combination
Enoxaparin: Nonsteroidal Anti-Inflammatory Agents may enhance the anticoagulant effect of Enoxaparin. Management: Discontinue nonsteroidal anti-inflammatory agents (NSAIDs) prior to initiating enoxaparin whenever possible. If concomitant administration is unavoidable, monitor closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Enoxaparin: Agents with Antiplatelet Properties may enhance the anticoagulant effect of Enoxaparin. Management: Discontinue antiplatelet agents prior to initiating enoxaparin whenever possible. If concomitant administration is unavoidable, monitor closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Eplerenone: Nonsteroidal Anti-Inflammatory Agents may diminish the antihypertensive effect of Eplerenone. Nonsteroidal Anti-Inflammatory Agents may enhance the hyperkalemic effect of Eplerenone. Risk C: Monitor therapy
Esketamine: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Flunarizine: CNS Depressants may enhance the CNS depressant effect of Flunarizine. Risk X: Avoid combination
Flunitrazepam: CNS Depressants may enhance the CNS depressant effect of Flunitrazepam. Management: Reduce the dose of CNS depressants when combined with flunitrazepam and monitor patients for evidence of CNS depression (eg, sedation, respiratory depression). Use non-CNS depressant alternatives when available. Risk D: Consider therapy modification
Gastrointestinal Agents (Prokinetic): Anticholinergic Agents may diminish the therapeutic effect of Gastrointestinal Agents (Prokinetic). Risk C: Monitor therapy
Glucagon: Anticholinergic Agents may enhance the adverse/toxic effect of Glucagon. Specifically, the risk of gastrointestinal adverse effects may be increased. Risk C: Monitor therapy
Glycopyrrolate (Oral Inhalation): Anticholinergic Agents may enhance the anticholinergic effect of Glycopyrrolate (Oral Inhalation). Risk X: Avoid combination
Glycopyrronium (Topical): May enhance the anticholinergic effect of Anticholinergic Agents. Risk X: Avoid combination
Heparin: Nonsteroidal Anti-Inflammatory Agents may enhance the anticoagulant effect of Heparin. Management: Decrease the dose of heparin or nonsteroidal anti-inflammatory agents (NSAIDs) if coadministration is required. Risk D: Consider therapy modification
Heparin: Agents with Antiplatelet Properties may enhance the anticoagulant effect of Heparin. Management: Decrease the dose of heparin or agents with antiplatelet properties if coadministration is required. Risk D: Consider therapy modification
Herbal Products with Anticoagulant/Antiplatelet Effects (eg, Alfalfa, Anise, Bilberry): May enhance the adverse/toxic effect of Agents with Antiplatelet Properties. Bleeding may occur. Risk C: Monitor therapy
Herbal Products with Anticoagulant/Antiplatelet Effects (eg, Alfalfa, Anise, Bilberry): May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Bleeding may occur. Risk C: Monitor therapy
Hyaluronidase: Antihistamines may diminish the therapeutic effect of Hyaluronidase. Risk C: Monitor therapy
HydrALAZINE: Nonsteroidal Anti-Inflammatory Agents may diminish the antihypertensive effect of HydrALAZINE. Risk C: Monitor therapy
HydrOXYzine: May enhance the CNS depressant effect of CNS Depressants. Management: Consider a decrease in the CNS depressant dose, as appropriate, when used together with hydroxyzine. Increase monitoring of signs/symptoms of CNS depression in any patient receiving hydroxyzine together with another CNS depressant. Risk D: Consider therapy modification
Ibritumomab Tiuxetan: Agents with Antiplatelet Properties may enhance the adverse/toxic effect of Ibritumomab Tiuxetan. Both agents may contribute to impaired platelet function and an increased risk of bleeding. Risk C: Monitor therapy
Ibrutinib: May enhance the adverse/toxic effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Icosapent Ethyl: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Inotersen: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Ipratropium (Oral Inhalation): May enhance the anticholinergic effect of Anticholinergic Agents. Risk X: Avoid combination
Isoproterenol: DiphenhydrAMINE (Systemic) may enhance the therapeutic effect of Isoproterenol. Risk C: Monitor therapy
Itopride: Anticholinergic Agents may diminish the therapeutic effect of Itopride. Risk C: Monitor therapy
Ixabepilone: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Kava Kava: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Ketorolac (Nasal): May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid combination
Ketorolac (Systemic): Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of Ketorolac (Systemic). Risk X: Avoid combination
Kratom: May enhance the CNS depressant effect of CNS Depressants. Risk X: Avoid combination
Lecanemab: May enhance the adverse/toxic effect of Agents with Antiplatelet Properties. Specifically, the risk of hemorrhage may be increased. Risk C: Monitor therapy
Lemborexant: May enhance the CNS depressant effect of CNS Depressants. Management: Dosage adjustments of lemborexant and of concomitant CNS depressants may be necessary when administered together because of potentially additive CNS depressant effects. Close monitoring for CNS depressant effects is necessary. Risk D: Consider therapy modification
Levosulpiride: Anticholinergic Agents may diminish the therapeutic effect of Levosulpiride. Risk X: Avoid combination
Limaprost: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Lipid Emulsion (Fish Oil Based): May enhance the adverse/toxic effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Lisuride: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Lithium: Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of Lithium. Management: Consider reducing the lithium dose when initiating a NSAID. Monitor for increased lithium therapeutic/toxic effects if a NSAID is initiated/dose increased, or decreased effects if a NSAID is discontinued/dose decreased. Risk D: Consider therapy modification
Lofexidine: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Loop Diuretics: Nonsteroidal Anti-Inflammatory Agents may diminish the diuretic effect of Loop Diuretics. Loop Diuretics may enhance the nephrotoxic effect of Nonsteroidal Anti-Inflammatory Agents. Management: Monitor for evidence of kidney injury or decreased therapeutic effects of loop diuretics with concurrent use of an NSAID. Consider avoiding concurrent use in CHF or cirrhosis. Concomitant use of bumetanide with indomethacin is not recommended. Risk D: Consider therapy modification
Macimorelin: Nonsteroidal Anti-Inflammatory Agents may diminish the diagnostic effect of Macimorelin. Risk X: Avoid combination
Magnesium Sulfate: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
MetFORMIN: Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of MetFORMIN. Risk C: Monitor therapy
Methotrexate: Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of Methotrexate. Management: Avoid coadministration of higher dose methotrexate (such as that used for the treatment of oncologic conditions) and NSAIDs. Use caution if coadministering lower dose methotrexate and NSAIDs. Risk D: Consider therapy modification
Methotrimeprazine: Products Containing Ethanol may enhance the adverse/toxic effect of Methotrimeprazine. Specifically, a disulfiram-like reaction may occur and CNS depressant effects may be increased. Management: Avoid products containing alcohol in patients treated with methotrimeprazine. Risk X: Avoid combination
Methoxsalen (Systemic): Photosensitizing Agents may enhance the photosensitizing effect of Methoxsalen (Systemic). Risk C: Monitor therapy
Metoclopramide: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
MetyroSINE: CNS Depressants may enhance the sedative effect of MetyroSINE. Risk C: Monitor therapy
Mianserin: May enhance the anticholinergic effect of Anticholinergic Agents. Risk C: Monitor therapy
Mifamurtide: Nonsteroidal Anti-Inflammatory Agents may diminish the therapeutic effect of Mifamurtide. Risk X: Avoid combination
Minocycline (Systemic): May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Mirabegron: Anticholinergic Agents may enhance the adverse/toxic effect of Mirabegron. Risk C: Monitor therapy
Multivitamins/Fluoride (with ADE): May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Multivitamins/Minerals (with ADEK, Folate, Iron): May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Multivitamins/Minerals (with AE, No Iron): May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Nabilone: May enhance the CNS depressant effect of CNS Depressants. Risk X: Avoid combination
Naftazone: May enhance the antiplatelet effect of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor therapy
Nitroglycerin: Anticholinergic Agents may decrease the absorption of Nitroglycerin. Specifically, anticholinergic agents may decrease the dissolution of sublingual nitroglycerin tablets, possibly impairing or slowing nitroglycerin absorption. Risk C: Monitor therapy
Nonsteroidal Anti-Inflammatory Agents: May enhance the adverse/toxic effect of other Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk for gastrointestinal toxicity is increased. Risk X: Avoid combination
Nonsteroidal Anti-Inflammatory Agents (Topical): May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of gastrointestinal (GI) toxicity is increased. Management: Coadministration of systemic nonsteroidal anti-inflammatory drugs (NSAIDs) and topical NSAIDs is not recommended. If systemic NSAIDs and topical NSAIDs, ensure the benefits outweigh the risks and monitor for increased NSAID toxicities. Risk D: Consider therapy modification
Obinutuzumab: Agents with Antiplatelet Properties may enhance the adverse/toxic effect of Obinutuzumab. Specifically, the risk of serious bleeding-related events may be increased. Risk C: Monitor therapy
Olopatadine (Nasal): May enhance the CNS depressant effect of CNS Depressants. Risk X: Avoid combination
Omacetaxine: Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of Omacetaxine. Specifically, the risk for bleeding-related events may be increased. Risk C: Monitor therapy
Omega-3 Fatty Acids: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Opioid Agonists: CNS Depressants may enhance the CNS depressant effect of Opioid Agonists. Management: Avoid concomitant use of opioid agonists and benzodiazepines or other CNS depressants when possible. These agents should only be combined if alternative treatment options are inadequate. If combined, limit the dosages and duration of each drug. Risk D: Consider therapy modification
Ornidazole: May enhance the adverse/toxic effect of Products Containing Ethanol. Specifically, a disulfiram-like reaction may occur. Risk X: Avoid combination
Orphenadrine: CNS Depressants may enhance the CNS depressant effect of Orphenadrine. Risk X: Avoid combination
Oxatomide: May enhance the anticholinergic effect of Anticholinergic Agents. Risk X: Avoid combination
Oxomemazine: May enhance the CNS depressant effect of CNS Depressants. Risk X: Avoid combination
Oxybate Salt Products: CNS Depressants may enhance the CNS depressant effect of Oxybate Salt Products. Management: Consider alternatives to this combination when possible. If combined, dose reduction or discontinuation of one or more CNS depressants (including the oxybate salt product) should be considered. Interrupt oxybate salt treatment during short-term opioid use Risk D: Consider therapy modification
OxyCODONE: CNS Depressants may enhance the CNS depressant effect of OxyCODONE. Management: Avoid concomitant use of oxycodone and benzodiazepines or other CNS depressants when possible. These agents should only be combined if alternative treatment options are inadequate. If combined, limit the dosages and duration of each drug. Risk D: Consider therapy modification
Paraldehyde: CNS Depressants may enhance the CNS depressant effect of Paraldehyde. Risk X: Avoid combination
Pentosan Polysulfate Sodium: May enhance the adverse/toxic effect of Agents with Antiplatelet Properties. Specifically, the risk of bleeding may be increased by concurrent use of these agents. Risk C: Monitor therapy
Pentoxifylline: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Perampanel: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Phenylbutazone: May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid combination
Piribedil: CNS Depressants may enhance the CNS depressant effect of Piribedil. Risk C: Monitor therapy
Pirtobrutinib: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Pitolisant: Antihistamines may diminish the therapeutic effect of Pitolisant. Risk X: Avoid combination
Polyethylene Glycol-Electrolyte Solution: Nonsteroidal Anti-Inflammatory Agents may enhance the nephrotoxic effect of Polyethylene Glycol-Electrolyte Solution. Risk C: Monitor therapy
Porfimer: Photosensitizing Agents may enhance the photosensitizing effect of Porfimer. Risk C: Monitor therapy
Potassium Chloride: Anticholinergic Agents may enhance the ulcerogenic effect of Potassium Chloride. Management: Patients on drugs with substantial anticholinergic effects should avoid using any solid oral dosage form of potassium chloride. Risk X: Avoid combination
Potassium Citrate: Anticholinergic Agents may enhance the ulcerogenic effect of Potassium Citrate. Management: Patients on drugs with substantial anticholinergic effects should avoid using any solid oral dosage form of potassium citrate. Risk X: Avoid combination
Potassium Salts: Nonsteroidal Anti-Inflammatory Agents may enhance the hyperkalemic effect of Potassium Salts. Risk C: Monitor therapy
Potassium-Sparing Diuretics: Nonsteroidal Anti-Inflammatory Agents may diminish the antihypertensive effect of Potassium-Sparing Diuretics. Nonsteroidal Anti-Inflammatory Agents may enhance the hyperkalemic effect of Potassium-Sparing Diuretics. Risk C: Monitor therapy
PRALAtrexate: Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of PRALAtrexate. More specifically, NSAIDS may decrease the renal excretion of pralatrexate. Management: Avoid coadministration of pralatrexate with nonsteroidal anti-inflammatory drugs (NSAIDs). If coadministration cannot be avoided, closely monitor for increased pralatrexate serum levels or toxicity. Risk D: Consider therapy modification
Pramipexole: CNS Depressants may enhance the sedative effect of Pramipexole. Risk C: Monitor therapy
Pramlintide: May enhance the anticholinergic effect of Anticholinergic Agents. These effects are specific to the GI tract. Risk X: Avoid combination
Probenecid: May increase the serum concentration of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor therapy
Procarbazine: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Prostacyclin Analogues: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Prostaglandins (Ophthalmic): Nonsteroidal Anti-Inflammatory Agents may diminish the therapeutic effect of Prostaglandins (Ophthalmic). Nonsteroidal Anti-Inflammatory Agents may also enhance the therapeutic effects of Prostaglandins (Ophthalmic). Risk C: Monitor therapy
Quinolones: Nonsteroidal Anti-Inflammatory Agents may enhance the neuroexcitatory and/or seizure-potentiating effect of Quinolones. Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of Quinolones. Risk C: Monitor therapy
Ramosetron: Anticholinergic Agents may enhance the constipating effect of Ramosetron. Risk C: Monitor therapy
Revefenacin: Anticholinergic Agents may enhance the anticholinergic effect of Revefenacin. Risk X: Avoid combination
Rivaroxaban: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may enhance the adverse/toxic effect of Rivaroxaban. Specifically, the risk of bleeding may be increased. Management: A comprehensive risk to benefit assessment should be done for all patients before any concurrent use of rivaroxaban and nonsteroidal anti-inflammatory drugs (NSAIDs). If combined, monitor patients extra closely for signs and symptoms of bleeding. Risk D: Consider therapy modification
Rivastigmine: Anticholinergic Agents may diminish the therapeutic effect of Rivastigmine. Rivastigmine may diminish the therapeutic effect of Anticholinergic Agents. Management: Use of rivastigmine with an anticholinergic agent is not recommended unless clinically necessary. If the combination is necessary, monitor for reduced anticholinergic effects. Risk D: Consider therapy modification
Ropeginterferon Alfa-2b: CNS Depressants may enhance the adverse/toxic effect of Ropeginterferon Alfa-2b. Specifically, the risk of neuropsychiatric adverse effects may be increased. Management: Avoid coadministration of ropeginterferon alfa-2b and other CNS depressants. If this combination cannot be avoided, monitor patients for neuropsychiatric adverse effects (eg, depression, suicidal ideation, aggression, mania). Risk D: Consider therapy modification
ROPINIRole: CNS Depressants may enhance the sedative effect of ROPINIRole. Risk C: Monitor therapy
Rotigotine: CNS Depressants may enhance the sedative effect of Rotigotine. Risk C: Monitor therapy
Rufinamide: May enhance the adverse/toxic effect of CNS Depressants. Specifically, sleepiness and dizziness may be enhanced. Risk C: Monitor therapy
Salicylates: Nonsteroidal Anti-Inflammatory Agents (Nonselective) may enhance the adverse/toxic effect of Salicylates. An increased risk of bleeding may be associated with use of this combination. Nonsteroidal Anti-Inflammatory Agents (Nonselective) may diminish the cardioprotective effect of Salicylates. Salicylates may decrease the serum concentration of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Management: Nonselective NSAIDs may reduce aspirin's cardioprotective effects. Administer ibuprofen 30-120 minutes after immediate-release aspirin, 2 to 4 hours after extended-release aspirin, or 8 hours before aspirin. Risk D: Consider therapy modification
Secnidazole: Products Containing Ethanol may enhance the adverse/toxic effect of Secnidazole. Risk X: Avoid combination
Secretin: Anticholinergic Agents may diminish the therapeutic effect of Secretin. Management: Avoid concomitant use of anticholinergic agents and secretin. Discontinue anticholinergic agents at least 5 half-lives prior to administration of secretin. Risk D: Consider therapy modification
Selective Serotonin Reuptake Inhibitors: May enhance the antiplatelet effect of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Nonsteroidal Anti-Inflammatory Agents (Nonselective) may diminish the therapeutic effect of Selective Serotonin Reuptake Inhibitors. Management: Consider alternatives to NSAIDs. Monitor for evidence of bleeding and diminished antidepressant effects. It is unclear whether COX-2-selective NSAIDs reduce risk. Risk D: Consider therapy modification
Selumetinib: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Serotonin/Norepinephrine Reuptake Inhibitors: May enhance the antiplatelet effect of Nonsteroidal Anti-Inflammatory Agents (Nonselective). Risk C: Monitor therapy
Sincalide: Drugs that Affect Gallbladder Function may diminish the therapeutic effect of Sincalide. Management: Consider discontinuing drugs that may affect gallbladder motility prior to the use of sincalide to stimulate gallbladder contraction. Risk D: Consider therapy modification
Sodium Phosphates: May enhance the nephrotoxic effect of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of acute phosphate nephropathy may be enhanced. Risk C: Monitor therapy
Suvorexant: CNS Depressants may enhance the CNS depressant effect of Suvorexant. Management: Dose reduction of suvorexant and/or any other CNS depressant may be necessary. Use of suvorexant with alcohol is not recommended, and the use of suvorexant with any other drug to treat insomnia is not recommended. Risk D: Consider therapy modification
Tacrolimus (Systemic): Nonsteroidal Anti-Inflammatory Agents may enhance the nephrotoxic effect of Tacrolimus (Systemic). Risk C: Monitor therapy
Tenofovir Products: Nonsteroidal Anti-Inflammatory Agents may enhance the nephrotoxic effect of Tenofovir Products. Management: Seek alternatives to these combinations whenever possible. Avoid use of tenofovir with multiple NSAIDs or any NSAID given at a high dose due to a potential risk of acute renal failure. Diclofenac appears to confer the most risk. Risk D: Consider therapy modification
Tenoxicam: May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Risk X: Avoid combination
Thalidomide: CNS Depressants may enhance the CNS depressant effect of Thalidomide. Risk X: Avoid combination
Thiazide and Thiazide-Like Diuretics: May enhance the nephrotoxic effect of Nonsteroidal Anti-Inflammatory Agents. Nonsteroidal Anti-Inflammatory Agents may diminish the therapeutic effect of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor therapy
Thiazide and Thiazide-Like Diuretics: Anticholinergic Agents may increase the serum concentration of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor therapy
Thioridazine: CYP2D6 Inhibitors (Weak) may increase the serum concentration of Thioridazine. Management: Consider avoiding concomitant use of thioridazine and weak CYP2D6 inhibitors. If combined, monitor closely for QTc interval prolongation and arrhythmias. Some weak CYP2D6 inhibitors list use with thioridazine as a contraindication. Risk D: Consider therapy modification
Thrombolytic Agents: Agents with Antiplatelet Properties may enhance the anticoagulant effect of Thrombolytic Agents. Risk C: Monitor therapy
Tiotropium: Anticholinergic Agents may enhance the anticholinergic effect of Tiotropium. Risk X: Avoid combination
Tipranavir: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Tolperisone: Nonsteroidal Anti-Inflammatory Agents may enhance the adverse/toxic effect of Tolperisone. Specifically, the risk of hypersensitivity reactions may be increased. Tolperisone may enhance the therapeutic effect of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor therapy
Topiramate: Anticholinergic Agents may enhance the adverse/toxic effect of Topiramate. Risk C: Monitor therapy
Tricyclic Antidepressants: May enhance the adverse/toxic effect of Nonsteroidal Anti-Inflammatory Agents. Specifically, the risk of major adverse cardiac events (MACE), hemorrhagic stroke, ischemic stroke, and heart failure may be increased. Tricyclic Antidepressants may enhance the antiplatelet effect of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor therapy
Trimeprazine: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Umeclidinium: May enhance the anticholinergic effect of Anticholinergic Agents. Risk X: Avoid combination
Urokinase: Agents with Antiplatelet Properties may enhance the anticoagulant effect of Urokinase. Risk X: Avoid combination
Valerian: May enhance the CNS depressant effect of CNS Depressants. Risk C: Monitor therapy
Vancomycin: Nonsteroidal Anti-Inflammatory Agents may increase the serum concentration of Vancomycin. Risk C: Monitor therapy
Verteporfin: Photosensitizing Agents may enhance the photosensitizing effect of Verteporfin. Risk C: Monitor therapy
Vitamin E (Systemic): May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Vitamin K Antagonists (eg, warfarin): Nonsteroidal Anti-Inflammatory Agents (Nonselective) may enhance the anticoagulant effect of Vitamin K Antagonists. Management: Consider alternatives to this combination when possible. If the combination must be used, monitor coagulation status closely and advise patients to promptly report any evidence of bleeding or bruising. Risk D: Consider therapy modification
Zanubrutinib: May enhance the antiplatelet effect of Agents with Antiplatelet Properties. Risk C: Monitor therapy
Zolpidem: CNS Depressants may enhance the CNS depressant effect of Zolpidem. Management: Reduce the Intermezzo brand sublingual zolpidem adult dose to 1.75 mg for men who are also receiving other CNS depressants. No such dose change is recommended for women. Avoid use with other CNS depressants at bedtime; avoid use with alcohol. Risk D: Consider therapy modification
Zuranolone: May enhance the CNS depressant effect of CNS Depressants. Management: Consider alternatives to the use of zuranolone with other CNS depressants or alcohol. If combined, consider a zuranolone dose reduction and monitor patients closely for increased CNS depressant effects. Risk D: Consider therapy modification
See individual agents.
Refer to individual monographs.
Refer to individual monographs.
Occult blood loss; periodic liver function test, CBC, BUN, serum creatinine; urine output; blood pressure (hypertensive patients); anticholinergic effects (especially in elderly patients)
Naproxen: Reversibly inhibits cyclooxygenase-1 and 2 (COX-1 and 2) enzymes, which results in decreased formation of prostaglandin precursors; has antipyretic, analgesic, and anti-inflammatory properties.
Other proposed mechanisms not fully elucidated (and possibly contributing to the anti-inflammatory effect to varying degrees) include inhibiting chemotaxis, altering lymphocyte activity, inhibiting neutrophil aggregation/activation, and decreasing proinflammatory cytokine levels.
Diphenhydramine: Competes with histamine for H1-receptor sites on effector cells in the gastrointestinal tract, blood vessels, and respiratory tract; anticholinergic and sedative effects are also seen.
See individual agents.
Altered kidney function: See individual agents.
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