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Captopril and hydrochlorothiazide: Drug information

Captopril and hydrochlorothiazide: Drug information
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For additional information see "Captopril and hydrochlorothiazide: Patient drug information"

For abbreviations, symbols, and age group definitions show table
ALERT: US Boxed Warning
Fetal toxicity:

When pregnancy is detected, discontinue captopril/hydrochlorothiazide as soon as possible. Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus.

Pharmacologic Category
  • Angiotensin-Converting Enzyme (ACE) Inhibitor;
  • Antihypertensive;
  • Diuretic, Thiazide
Dosing: Adult

Note: Dose is individualized; may be substituted for previously titrated dosages of the individual components; alternatively, may initiate as follows:

Hypertension

Hypertension: Initial: Oral: Captopril 25 mg/hydrochlorothiazide 15 mg once daily; titrate to response; may administer in one or more divided doses. Maximum dose: Captopril 150 mg/hydrochlorothiazide 50 mg per day.

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Kidney Impairment: Adult

Reduce initial daily dose and titrate slowly (1- to 2-week intervals) with smaller increments. Slowly back titrate to determine the minimum effective dose once the desired therapeutic effect has been reached. Hydrochlorothiazide is contraindicated in patients with anuria.

Dosing: Liver Impairment: Adult

There are no dosage adjustments provided in the manufacturer's labeling. Use with caution; hydrochlorothiazide may precipitate hepatic coma.

Dosing: Older Adult

Refer to adult dosing.

Adverse Reactions

See individual agents.

Contraindications

Hypersensitivity to captopril, any other ACE inhibitor, hydrochlorothiazide, sulfonamide-derived drugs, or any component of the formulation; angioedema or serious hypersensitivity related to previous treatment with an ACE inhibitor; concomitant use with aliskiren in patients with diabetes mellitus; anuria; coadministration with or within 36 hours of switching to or from a neprilysin inhibitor (eg, sacubitril).

Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Note: Although the FDA-approved product labeling states this medication is contraindicated in patients with hypersensitivity to sulfonamide-containing drugs, the scientific basis of this cross-sensitivity has been challenged.

Warnings/Precautions

Concerns related to adverse effects:

• Angioedema: At any time during treatment (especially following first dose) angioedema may occur rarely with ACE inhibitors; it may involve the head and neck (potentially compromising airway) or the intestine (presenting with abdominal pain). African-Americans and patients with idiopathic or hereditary angioedema may be at an increased risk. Risk may also be increased with concomitant use of mTOR inhibitor (eg, everolimus) therapy or a neprilysin inhibitor (eg, sacubitril). Prolonged frequent monitoring may be required, especially if tongue, glottis, or larynx are involved as they are associated with airway obstruction. Patients with a history of airway surgery may have a higher risk of airway obstruction. Aggressive early and appropriate management is critical. Use is contraindicated with previous angioedema associated with ACE inhibitor therapy.

• Cholestatic jaundice: A rare toxicity associated with ACE inhibitors includes cholestatic jaundice, which may progress to fulminant hepatic necrosis; discontinue if marked elevation of hepatic transaminases or jaundice occurs.

• Cough: An ACE inhibitor cough is a dry, hacking, nonproductive one that usually occurs within the first few months of treatment and should generally resolve within 1 to 4 weeks after discontinuation of the ACE inhibitor. Other causes of cough should be considered (eg, pulmonary congestion in patients with heart failure) and excluded prior to discontinuation.

• Electrolyte disturbances: Hyperkalemia may occur with ACE inhibitors; risk factors include renal dysfunction, diabetes mellitus, and concomitant use of potassium-sparing diuretics, potassium supplements, and/or potassium-containing salts. Use cautiously, if at all, with these agents and monitor potassium closely. Thiazide diuretics may cause hypokalemia, hypochloremic alkalosis, hypomagnesemia, and hyponatremia.

• Gout: In certain patients with a history of gout, a familial predisposition to gout, or chronic renal failure, gout can be precipitated by hydrochlorothiazide. This risk may be increased with doses ≥25 mg (Gurwitz 1997).

• Hematologic effects: Captopril has been associated with neutropenia with myeloid hypoplasia and agranulocytosis; anemia and thrombocytopenia have also occurred. Patients with renal impairment are at high risk of developing neutropenia. Patients with both renal impairment and collagen vascular disease (eg, systemic lupus erythematosus) are at an even higher risk of developing neutropenia. Closely monitor CBC with differential for the first 3 months of therapy and periodically thereafter in these patients. Onset of neutropenia is usually within 3 months of captopril initiation. Neutrophil count generally returns to baseline within 2 weeks of discontinuation. If neutropenia develops (neutrophil count <1,000/mm3), discontinue therapy.

• Hypersensitivity reactions: Anaphylactic/anaphylactoid reactions can occur with ACE inhibitors. Severe anaphylactoid reactions may be seen during hemodialysis (eg, CVVHD) with high-flux dialysis membranes (eg, AN69), and rarely, during low density lipoprotein apheresis with dextran sulfate cellulose. Rare cases of anaphylactoid reactions have been reported in patients undergoing sensitization treatment with hymenoptera (bee, wasp) venom while receiving ACE inhibitors. Hypersensitivity reactions may also occur with hydrochlorothiazide; risk is increased in patients with a history of allergy or bronchial asthma.

• Hypotension/syncope: Symptomatic hypotension with or without syncope can occur with ACE inhibitors (usually with the first several doses); effects are most often observed in volume-depleted patients; correct volume depletion prior to initiation; close monitoring of patient is required especially with initial dosing and dosing increases; blood pressure must be lowered at a rate appropriate for the patient's clinical condition. Although dose reduction may be necessary, hypotension is not a reason for discontinuation of future ACE inhibitor use especially in patients with heart failure where a reduction in systolic blood pressure is a desirable observation.

• Ocular effects: Hydrochlorothiazide may cause acute transient myopia and acute angle-closure glaucoma, typically occurring within hours to weeks following initiation; discontinue therapy immediately in patients with acute decreases in visual acuity or ocular pain. Additional treatments may be needed if uncontrolled intraocular pressure persists. Risk factors may include a history of sulfonamide or penicillin allergy.

• Photosensitivity: Photosensitization may occur with hydrochlorothiazide.

• Renal function deterioration: May be associated with deterioration of renal function and/or increases in serum creatinine, particularly in patients with low renal blood flow (eg, renal artery stenosis, heart failure) whose glomerular filtration rate (GFR) is dependent on efferent arteriolar vasoconstriction by angiotensin II; deterioration may result in oliguria, acute renal failure, and progressive azotemia. Small increases in serum creatinine may occur following initiation; consider discontinuation only in patients with progressive and/or significant deterioration in renal function (Bakris 2000).

• Skin cancer, nonmelanoma: Prolonged use (≥3 years) may increase the risk for squamous cell carcinoma up to 4 times and increase the risk for basal cell carcinoma up to 1.25 times compared to patients not treated with hydrochlorothiazide (Pedersen 2018; Pottegård 2017).

• Sulfonamide (“sulfa”) allergy: The FDA-approved product labeling for many medications containing a sulfonamide chemical group includes a broad contraindication in patients with a prior allergic reaction to sulfonamides. There is a potential for cross-reactivity between members of a specific class (eg, two antibiotic sulfonamides). However, concerns for cross-reactivity have previously extended to all compounds containing the sulfonamide structure (SO2NH2). An expanded understanding of allergic mechanisms indicates cross-reactivity between antibiotic sulfonamides and nonantibiotic sulfonamides may not occur or at the very least this potential is extremely low (Brackett 2004; Johnson 2005; Slatore 2004; Tornero 2004). In particular, mechanisms of cross-reaction due to antibody production (anaphylaxis) are unlikely to occur with nonantibiotic sulfonamides. T-cell-mediated (type IV) reactions (eg, maculopapular rash) are less well understood and it is not possible to completely exclude this potential based on current insights. In cases where prior reactions were severe (Stevens-Johnson syndrome/TEN), some clinicians choose to avoid exposure to these classes.

Disease-related concerns:

• Aortic stenosis: Use with caution in patients with severe aortic stenosis; may reduce coronary perfusion resulting in ischemia.

• Bariatric surgery: Dehydration: Avoid diuretics in the immediate postoperative period after bariatric surgery; electrolyte disturbances and dehydration may occur. Diuretics may be resumed, if indicated, once oral fluid intake goals are met (Ziegler 2009).

• Cardiovascular disease: Initiation of therapy in patients with ischemic heart disease or cerebrovascular disease warrants close observation due to the potential consequences posed by falling blood pressure (eg, MI, stroke). Fluid replacement, if needed, may restore blood pressure; therapy may then be resumed. Discontinue therapy in patients whose hypotension recurs.

• Collagen vascular disease: Use with caution in patients with collagen vascular disease especially with concomitant renal impairment; may be at increased risk for hematologic toxicity. Hydrochlorothiazide can cause systemic lupus erythematosus (SLE) exacerbation or activation.

• Diabetes: Use hydrochlorothiazide with caution in patients with prediabetes or diabetes mellitus; may see a change in glucose control.

• Hepatic impairment: Use caution in patients with severe hepatic impairment. In progressive or severe liver disease, avoid electrolyte and acid/base imbalances that might lead to hepatic encephalopathy/coma. In cirrhosis, avoid electrolyte and acid/base imbalances that might lead to hepatic encephalopathy.

• Hypercalcemia: Thiazide diuretics may decrease renal calcium excretion; consider avoiding use in patients with hypercalcemia.

• Hypercholesterolemia: Use with caution in patients with moderate or high cholesterol concentrations; increased cholesterol and triglyceride levels have been reported with thiazides.

• Hypertrophic cardiomyopathy with left ventricular outflow tract obstruction: Use with caution in patients with hypertrophic cardiomyopathy and left ventricular outflow tract obstruction since reduction in afterload may worsen symptoms associated with this condition (AHA/ACC [Ommen 2024]).

• Parathyroid disease: Thiazide diuretics reduce calcium excretion; pathologic changes in the parathyroid glands with hypercalcemia and hypophosphatemia have been observed with prolonged use; should be discontinued prior to testing for parathyroid function.

• Renal artery stenosis: Use captopril with caution in patients with unstented unilateral/bilateral renal artery stenosis. When unstented bilateral renal artery stenosis is present, use is generally avoided due to the elevated risk of deterioration in renal function unless possible benefits outweigh risks.

• Renal impairment: Use ACE inhibitors with caution in preexisting renal insufficiency; dosage adjustment may be needed. Avoid rapid dosage escalation which may lead to further renal impairment. Patients with renal impairment may be at increased risk for hematologic toxicity. Cumulative effects of hydrochlorothiazide may develop, including azotemia, in patients with impaired renal function. Avoid hydrochlorothiazide in severe renal disease (ineffective). Contraindicated in anuric patients.

Special populations:

• Black patients: ACE inhibitors effectiveness is less in black patients than in non-blacks. In addition, ACE inhibitors cause a higher rate of angioedema in black than in non-black patients.

• Pregnancy: [US Boxed Warning]: Drugs that act on the renin-angiotensin system can cause injury and death to the developing fetus. Discontinue as soon as possible once pregnancy is detected.

Other warnings/precautions:

• Surgery: In patients on chronic ACE inhibitor therapy, intraoperative hypotension may occur with induction and maintenance of general anesthesia; use with caution before, during, or immediately after major surgery. Cardiopulmonary bypass, intraoperative blood loss, or vasodilating anesthesia increases endogenous renin release. Use of ACE inhibitors perioperatively will blunt angiotensin II formation and may result in hypotension. However, discontinuation of therapy prior to surgery is controversial. If continued preoperatively, avoidance of hypotensive agents during surgery is prudent (Hillis 2011).

Dosage Forms: US

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Tablet, Oral:

Generic: Captopril 25 mg and hydrochlorothiazide 15 mg, Captopril 25 mg and hydrochlorothiazide 25 mg, Captopril 50 mg and hydrochlorothiazide 15 mg, Captopril 50 mg and hydrochlorothiazide 25 mg

Generic Equivalent Available: US

Yes

Pricing: US

Tablets (Captopril-hydroCHLOROthiazide Oral)

25-15 mg (per each): $2.85

25-25 mg (per each): $2.85

50-15 mg (per each): $4.90

50-25 mg (per each): $4.90

Disclaimer: A representative AWP (Average Wholesale Price) price or price range is provided as reference price only. A range is provided when more than one manufacturer's AWP price is available and uses the low and high price reported by the manufacturers to determine the range. The pricing data should be used for benchmarking purposes only, and as such should not be used alone to set or adjudicate any prices for reimbursement or purchasing functions or considered to be an exact price for a single product and/or manufacturer. Medi-Span expressly disclaims all warranties of any kind or nature, whether express or implied, and assumes no liability with respect to accuracy of price or price range data published in its solutions. In no event shall Medi-Span be liable for special, indirect, incidental, or consequential damages arising from use of price or price range data. Pricing data is updated monthly.

Administration: Adult

Administer ≥1 hour before meals.

Use: Labeled Indications

Hypertension: Management of hypertension

Medication Safety Issues
Older Adult: High-Risk Medication:

Beers Criteria: Diuretics (hydrochlorothiazide) are identified in the Beers Criteria as potentially inappropriate medications to be used with caution in patients 65 years and older due to the potential to cause or exacerbate syndrome of inappropriate antidiuretic hormone secretion (SIADH) or hyponatremia; monitor sodium concentration closely when initiating or adjusting the dose in older adults (Beers Criteria [AGS 2023]).

Metabolism/Transport Effects

Refer to individual components.

Drug Interactions

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 drug interactions program by clicking on the “Launch drug interactions program” link above.

Agents with Clinically Relevant Anticholinergic Effects: May increase serum concentration of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Ajmaline: Sulfonamides may increase adverse/toxic effects of Ajmaline. Specifically, the risk for cholestasis may be increased. Risk C: Monitor

Alcohol (Ethyl): May increase orthostatic hypotensive effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Alfuzosin: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Aliskiren: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Aliskiren may increase nephrotoxic effects of Angiotensin-Converting Enzyme Inhibitors. Aliskiren may increase hypotensive effects of Angiotensin-Converting Enzyme Inhibitors. Management: Aliskiren use with ACEIs or ARBs in patients with diabetes is contraindicated. Combined use in other patients should be avoided, particularly when CrCl is less than 60 mL/min. If combined, monitor potassium, creatinine, and blood pressure closely. Risk D: Consider Therapy Modification

Allopurinol: Angiotensin-Converting Enzyme Inhibitors may increase hypersensitivity effects of Allopurinol. Risk C: Monitor

Allopurinol: Thiazide and Thiazide-Like Diuretics may increase hypersensitivity effects of Allopurinol. Risk C: Monitor

Alteplase: Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Alteplase. Specifically, the risk for angioedema may be increased. Risk C: Monitor

Amifostine: Blood Pressure Lowering Agents may increase hypotensive effects of Amifostine. Management: When used at chemotherapy doses, hold blood pressure lowering medications for 24 hours before amifostine administration. If blood pressure lowering therapy cannot be held, do not administer amifostine. Use caution with radiotherapy doses of amifostine. Risk D: Consider Therapy Modification

Aminolevulinic Acid (Systemic): Photosensitizing Agents may increase photosensitizing effects of Aminolevulinic Acid (Systemic). Risk X: Avoid

Aminolevulinic Acid (Topical): Photosensitizing Agents may increase photosensitizing effects of Aminolevulinic Acid (Topical). Risk C: Monitor

Amphetamines: May decrease antihypertensive effects of Antihypertensive Agents. Risk C: Monitor

Angiotensin II Receptor Blockers: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Angiotensin II Receptor Blockers may increase serum concentration of Angiotensin-Converting Enzyme Inhibitors. Management: Use of telmisartan and ramipril is not recommended. It is not clear if any other combination of an ACE inhibitor and an ARB would be any safer. Consider alternatives when possible. Monitor blood pressure, renal function, and potassium if combined. Risk D: Consider Therapy Modification

Angiotensin II: Angiotensin-Converting Enzyme Inhibitors may increase therapeutic effects of Angiotensin II. Risk C: Monitor

Antacids: May decrease serum concentration of Captopril. Risk C: Monitor

Antidiabetic Agents: Hyperglycemia-Associated Agents may decrease therapeutic effects of Antidiabetic Agents. Risk C: Monitor

Antidiabetic Agents: Thiazide and Thiazide-Like Diuretics may decrease therapeutic effects of Antidiabetic Agents. Risk C: Monitor

Antipsychotic Agents (Second Generation [Atypical]): Blood Pressure Lowering Agents may increase hypotensive effects of Antipsychotic Agents (Second Generation [Atypical]). Risk C: Monitor

Aprotinin: May decrease antihypertensive effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Arginine: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Arsenic Trioxide: Thiazide and Thiazide-Like Diuretics may increase hypotensive effects of Arsenic Trioxide. Thiazide and Thiazide-Like Diuretics may increase QTc-prolonging effects of Arsenic Trioxide. Management: When possible, avoid concurrent use of arsenic trioxide with drugs that can cause electrolyte abnormalities, such as the thiazide and thiazide-like diuretics. Risk D: Consider Therapy Modification

AzaTHIOprine: Angiotensin-Converting Enzyme Inhibitors may increase myelosuppressive effects of AzaTHIOprine. Risk C: Monitor

Barbiturates: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Benperidol: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Beta-Acetyldigoxin: Captopril may increase serum concentration of Beta-Acetyldigoxin. Risk C: Monitor

Beta2-Agonists: May increase hypokalemic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Bile Acid Sequestrants: May decrease absorption of Thiazide and Thiazide-Like Diuretics. Management: Separate administration of bile acid sequestrants and oral thiazide diuretics by at least 4 hours. Monitor for decreased therapeutic effects of thiazide diuretics if coadministered with a bile acid sequestrant. Risk D: Consider Therapy Modification

Brigatinib: May decrease antihypertensive effects of Antihypertensive Agents. Brigatinib may increase bradycardic effects of Antihypertensive Agents. Risk C: Monitor

Brimonidine (Topical): May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Bromperidol: May decrease hypotensive effects of Blood Pressure Lowering Agents. Blood Pressure Lowering Agents may increase hypotensive effects of Bromperidol. Risk X: Avoid

Calcium Salts: Thiazide and Thiazide-Like Diuretics may increase serum concentration of Calcium Salts. Risk C: Monitor

Cardiac Glycosides: Thiazide and Thiazide-Like Diuretics may increase adverse/toxic effects of Cardiac Glycosides. Specifically, cardiac glycoside toxicity may be enhanced by the hypokalemic and hypomagnesemic effect of thiazide diuretics. Risk C: Monitor

Corticosteroids (Systemic): May increase hypokalemic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

CycloPHOSphamide: Thiazide and Thiazide-Like Diuretics may increase adverse/toxic effects of CycloPHOSphamide. Specifically, granulocytopenia may be enhanced. Risk C: Monitor

Dapoxetine: May increase orthostatic hypotensive effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Desmopressin: Hyponatremia-Associated Agents may increase hyponatremic effects of Desmopressin. Risk C: Monitor

Dexketoprofen: May increase adverse/toxic effects of Sulfonamides. Risk C: Monitor

Dexmethylphenidate: May decrease therapeutic effects of Antihypertensive Agents. Risk C: Monitor

Diacerein: May increase therapeutic effects of Diuretics. Specifically, the risk for dehydration or hypokalemia may be increased. Risk C: Monitor

Diazoxide Choline: May increase adverse/toxic effects of Thiazide and Thiazide-Like Diuretics. Specifically, the hyperglycemic and hyperuricemic effects may be increased. Risk C: Monitor

Diazoxide: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Diazoxide: Thiazide and Thiazide-Like Diuretics may increase adverse/toxic effects of Diazoxide. Risk C: Monitor

Dichlorphenamide: Thiazide and Thiazide-Like Diuretics may increase hypokalemic effects of Dichlorphenamide. Risk C: Monitor

Dipeptidyl Peptidase-IV Inhibitors: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Specifically, the risk of angioedema may be increased. Risk C: Monitor

Dofetilide: HydroCHLOROthiazide may increase QTc-prolonging effects of Dofetilide. HydroCHLOROthiazide may increase serum concentration of Dofetilide. Risk X: Avoid

Drospirenone-Containing Products: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

DULoxetine: Blood Pressure Lowering Agents may increase hypotensive effects of DULoxetine. Risk C: Monitor

EPINEPHrine (Systemic): Diuretics may increase arrhythmogenic effects of EPINEPHrine (Systemic). Diuretics may decrease vasopressor effects of EPINEPHrine (Systemic). Risk C: Monitor

Everolimus: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Specifically, the risk of angioedema may be increased. Risk C: Monitor

Ferric Gluconate: Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Ferric Gluconate. Risk C: Monitor

Ferric Hydroxide Polymaltose Complex: Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Ferric Hydroxide Polymaltose Complex. Specifically, the risk for angioedema or allergic reactions may be increased. Risk C: Monitor

Finerenone: Angiotensin-Converting Enzyme Inhibitors may increase hyperkalemic effects of Finerenone. Risk C: Monitor

Flunarizine: May increase therapeutic effects of Antihypertensive Agents. Risk C: Monitor

Gelatin (Succinylated): Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Gelatin (Succinylated). Specifically, the risk of a paradoxical hypotensive reaction may be increased. Risk C: Monitor

Grass Pollen Allergen Extract (5 Grass Extract): Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Grass Pollen Allergen Extract (5 Grass Extract). Specifically, ACE inhibitors may increase the risk of severe allergic reaction to Grass Pollen Allergen Extract (5 Grass Extract). Risk X: Avoid

Heparin: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Heparins (Low Molecular Weight): May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Herbal Products with Blood Pressure Increasing Effects: May decrease antihypertensive effects of Antihypertensive Agents. Risk C: Monitor

Herbal Products with Blood Pressure Lowering Effects: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Hypotension-Associated Agents: Blood Pressure Lowering Agents may increase hypotensive effects of Hypotension-Associated Agents. Risk C: Monitor

Icatibant: May decrease antihypertensive effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Iloperidone: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Indoramin: May increase hypotensive effects of Antihypertensive Agents. Risk C: Monitor

Ipragliflozin: May increase adverse/toxic effects of Thiazide and Thiazide-Like Diuretics. Specifically, the risk for intravascular volume depletion may be increased. Risk C: Monitor

Iron Dextran Complex: Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Iron Dextran Complex. Specifically, patients receiving an ACE inhibitor may be at an increased risk for anaphylactic-type reactions. Risk C: Monitor

Isocarboxazid: May increase antihypertensive effects of Antihypertensive Agents. Risk X: Avoid

Isocarboxazid: May increase hypotensive effects of Diuretics. Risk X: Avoid

Ivabradine: Thiazide and Thiazide-Like Diuretics may increase arrhythmogenic effects of Ivabradine. Risk C: Monitor

Lanthanum: May decrease serum concentration of Angiotensin-Converting Enzyme Inhibitors. Management: Administer angiotensin-converting enzyme (ACE) inhibitors at least two hours before or after lanthanum. Risk D: Consider Therapy Modification

Levodopa-Foslevodopa: Blood Pressure Lowering Agents may increase hypotensive effects of Levodopa-Foslevodopa. Risk C: Monitor

Levosulpiride: Thiazide and Thiazide-Like Diuretics may increase adverse/toxic effects of Levosulpiride. Risk X: Avoid

Licorice: May increase hypokalemic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Lithium: Angiotensin-Converting Enzyme Inhibitors may increase serum concentration of Lithium. Management: Lithium dosage reductions will likely be needed following the addition of an ACE inhibitor. Monitor for increased concentrations/toxic effects of lithium if an ACE inhibitor is initiated/dose increased, or if switching between ACE inhibitors. Risk D: Consider Therapy Modification

Lithium: Thiazide and Thiazide-Like Diuretics may decrease excretion of Lithium. Management: Reduce the lithium dose if coadministered with thiazide or thiazide-like diuretics. Monitor serum lithium levels during coadministration with thiazide and thiazide-like diuretics. Risk D: Consider Therapy Modification

Loop Diuretics: May increase hypotensive effects of Angiotensin-Converting Enzyme Inhibitors. Loop Diuretics may increase nephrotoxic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Loop Diuretics: May increase hypotensive effects of Antihypertensive Agents. Risk C: Monitor

Lormetazepam: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Mecamylamine: Thiazide and Thiazide-Like Diuretics may increase adverse/toxic effects of Mecamylamine. Management: Consider avoiding the use of mecamylamine and thiazide diuretics. If combined, mecamylamine prescribing information suggests reducing the mecamylamine dose by 50% in order to avoid excessive hypotension. Risk D: Consider Therapy Modification

Metergoline: May decrease antihypertensive effects of Blood Pressure Lowering Agents. Blood Pressure Lowering Agents may increase orthostatic hypotensive effects of Metergoline. Risk C: Monitor

Methenamine: Thiazide and Thiazide-Like Diuretics may decrease therapeutic effects of Methenamine. Risk C: Monitor

Methotrexate: HydroCHLOROthiazide may increase nephrotoxic effects of Methotrexate. Risk C: Monitor

Methoxsalen (Systemic): Photosensitizing Agents may increase photosensitizing effects of Methoxsalen (Systemic). Risk C: Monitor

Methylphenidate: May decrease antihypertensive effects of Antihypertensive Agents. Risk C: Monitor

Molsidomine: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Multivitamins/Fluoride (with ADE): May increase hypercalcemic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Multivitamins/Minerals (with ADEK, Folate, Iron): Thiazide and Thiazide-Like Diuretics may increase hypercalcemic effects of Multivitamins/Minerals (with ADEK, Folate, Iron). Risk C: Monitor

Multivitamins/Minerals (with AE, No Iron): Thiazide and Thiazide-Like Diuretics may increase serum concentration of Multivitamins/Minerals (with AE, No Iron). Specifically, thiazide diuretics may decrease the excretion of calcium, and continued concomitant use can also result in metabolic alkalosis. Risk C: Monitor

Naftopidil: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Neuromuscular-Blocking Agents (Nondepolarizing): Thiazide and Thiazide-Like Diuretics may increase neuromuscular-blocking effects of Neuromuscular-Blocking Agents (Nondepolarizing). Risk C: Monitor

Nicergoline: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Nicorandil: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Nicorandil: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Nitroprusside: Blood Pressure Lowering Agents may increase hypotensive effects of Nitroprusside. Risk C: Monitor

Nonsteroidal Anti-Inflammatory Agents (Topical): May decrease therapeutic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Nonsteroidal Anti-Inflammatory Agents (Topical): May decrease therapeutic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Nonsteroidal Anti-Inflammatory Agents: May decrease antihypertensive effects of Angiotensin-Converting Enzyme Inhibitors. Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Nonsteroidal Anti-Inflammatory Agents. Specifically, the combination may result in a significant decrease in renal function. Risk C: Monitor

Nonsteroidal Anti-Inflammatory Agents: May decrease therapeutic effects of Thiazide and Thiazide-Like Diuretics. Thiazide and Thiazide-Like Diuretics may increase nephrotoxic effects of Nonsteroidal Anti-Inflammatory Agents. Risk C: Monitor

Obinutuzumab: May increase hypotensive effects of Blood Pressure Lowering Agents. Management: Consider temporarily withholding blood pressure lowering medications beginning 12 hours prior to obinutuzumab infusion and continuing until 1 hour after the end of the infusion. Risk D: Consider Therapy Modification

Opioid Agonists: May increase adverse/toxic effects of Diuretics. Opioid Agonists may decrease therapeutic effects of Diuretics. Risk C: Monitor

Palopegteriparatide: Thiazide and Thiazide-Like Diuretics may increase therapeutic effects of Palopegteriparatide. Thiazide and Thiazide-Like Diuretics may decrease therapeutic effects of Palopegteriparatide. Risk C: Monitor

Pentoxifylline: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Perazine: May increase hypotensive effects of Antihypertensive Agents. Risk C: Monitor

Pholcodine: Blood Pressure Lowering Agents may increase hypotensive effects of Pholcodine. Risk C: Monitor

Phosphodiesterase 5 Inhibitors: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Piperacillin: May increase hypokalemic effects of Diuretics. Risk C: Monitor

Polyethylene Glycol-Electrolyte Solution: Angiotensin-Converting Enzyme Inhibitors may increase nephrotoxic effects of Polyethylene Glycol-Electrolyte Solution. Risk C: Monitor

Polyethylene Glycol-Electrolyte Solution: Diuretics may increase nephrotoxic effects of Polyethylene Glycol-Electrolyte Solution. Risk C: Monitor

Porfimer: Photosensitizing Agents may increase photosensitizing effects of Porfimer. Risk X: Avoid

Potassium Salts: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Potassium-Sparing Diuretics: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Prazosin: Antihypertensive Agents may increase hypotensive effects of Prazosin. Risk C: Monitor

Pregabalin: Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Pregabalin. Specifically, the risk of angioedema may be increased. Risk C: Monitor

Promazine: Thiazide and Thiazide-Like Diuretics may increase QTc-prolonging effects of Promazine. Risk X: Avoid

Prostacyclin Analogues: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Quinagolide: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Racecadotril: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Specifically, the risk for angioedema may be increased with this combination. Risk C: Monitor

Ranolazine: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Reboxetine: May increase hypokalemic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Sacubitril: Angiotensin-Converting Enzyme Inhibitors may increase adverse/toxic effects of Sacubitril. Specifically, the risk of angioedema may be increased with this combination. Risk X: Avoid

Salicylates: May decrease therapeutic effects of Angiotensin-Converting Enzyme Inhibitors. Salicylates may increase nephrotoxic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Selective Serotonin Reuptake Inhibitor: May increase hyponatremic effects of Thiazide and Thiazide-Like Diuretics. Risk C: Monitor

Silodosin: May increase hypotensive effects of Blood Pressure Lowering Agents. Risk C: Monitor

Sirolimus Products: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Specifically, the risk for angioedema may be increased. Risk C: Monitor

Sodium Phosphates: Angiotensin-Converting Enzyme Inhibitors may increase nephrotoxic effects of Sodium Phosphates. Specifically, the risk of acute phosphate nephropathy may be enhanced. Risk C: Monitor

Sodium Phosphates: Diuretics may increase nephrotoxic effects of Sodium Phosphates. Specifically, the risk of acute phosphate nephropathy may be enhanced. Risk C: Monitor

Sotagliflozin: HydroCHLOROthiazide may decrease therapeutic effects of Sotagliflozin. Sotagliflozin may decrease serum concentration of HydroCHLOROthiazide. Risk C: Monitor

Sparsentan: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Risk X: Avoid

Tacrolimus (Systemic): Angiotensin-Converting Enzyme Inhibitors may increase hyperkalemic effects of Tacrolimus (Systemic). Risk C: Monitor

Temsirolimus: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Specifically, the risk of angioedema may be increased. Risk C: Monitor

Terazosin: Antihypertensive Agents may increase hypotensive effects of Terazosin. Risk C: Monitor

Tolvaptan: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Risk C: Monitor

Topiramate: Thiazide and Thiazide-Like Diuretics may increase hypokalemic effects of Topiramate. Thiazide and Thiazide-Like Diuretics may increase serum concentration of Topiramate. Risk C: Monitor

Toremifene: Thiazide and Thiazide-Like Diuretics may increase hypercalcemic effects of Toremifene. Risk C: Monitor

Trimethoprim: May increase hyperkalemic effects of Angiotensin-Converting Enzyme Inhibitors. Management: Consider avoiding coadministration if possible. If combined, monitor serum potassium closely, particularly for patients with other risk factors (eg, renal impairment, older age, and other medications that increase potassium. Risk X: Avoid

Urapidil: And Angiotensin-Converting Enzyme Inhibitors may interact via an unclear mechanism. Management: Avoid concomitant use of urapidil and angiotensin-converting enzyme (ACE) inhibitors. Risk D: Consider Therapy Modification

Urokinase: May increase adverse/toxic effects of Angiotensin-Converting Enzyme Inhibitors. Specifically, the risk of angioedema may be increased. Risk C: Monitor

Verteporfin: Photosensitizing Agents may increase photosensitizing effects of Verteporfin. Risk C: Monitor

Vitamin D Analogs: Thiazide and Thiazide-Like Diuretics may increase hypercalcemic effects of Vitamin D Analogs. Risk C: Monitor

Food Interactions

See individual agents.

Pregnancy Considerations

[US Boxed Warning]: Drugs that act on the renin-angiotensin system can cause injury and death to the developing fetus. Discontinue as soon as possible once pregnancy is detected. See individual agents for additional information.

Breastfeeding Considerations

Captopril and thiazide diuretics are present in breast milk. Due to the potential for serious adverse reactions in the breastfeeding infant, the manufacturer recommends a decision be made whether to discontinue breastfeeding or to discontinue the drug, taking into account the importance of treatment to the mother. See individual agents for additional information.

Monitoring Parameters

Blood pressure; BUN, serum creatinine, and electrolytes; in patients with renal impairment and/or collagen vascular disease, closely monitor CBC with differential for the first 3 months of therapy and periodically thereafter.

Mechanism of Action

Captopril: Competitive inhibitor of angiotensin-converting enzyme (ACE); prevents conversion of angiotensin I to angiotensin II, a potent vasoconstrictor. This results in lower levels of angiotensin II which causes an increase in plasma renin activity and a reduction in aldosterone secretion.

Hydrochlorothiazide: Inhibits sodium reabsorption in the distal tubules causing increased excretion of sodium and water as well as potassium and hydrogen ions.

Pharmacokinetics (Adult Data Unless Noted)

See individual agents.

Brand Names: International
International Brand Names by Country
For country code abbreviations (show table)

  • (AE) United Arab Emirates: Capozide;
  • (AT) Austria: Capozide | Captohexal comp | Captopril hct ratiopharm | Captopril hydrochlorothiazide | Co-captopril;
  • (BF) Burkina Faso: Captiazid | Captopril+hct denk;
  • (BG) Bulgaria: Captopres;
  • (BR) Brazil: Captopril + hidroclorotiazida | Captotec + hct | Co-labopril | Diurezin-C | Hidropril | Lopril-d;
  • (CH) Switzerland: Capozide | Captosol comp. | Tensobon comp;
  • (CI) Côte d'Ivoire: Captiazid | Captor hct;
  • (CL) Chile: Ecazide;
  • (CN) China: Captopril co. | Compound captopril | Kai fu te;
  • (CO) Colombia: Capozide;
  • (CZ) Czech Republic: Capozide | Captohexal comp;
  • (DE) Germany: Ace hemmer comp | Ace-hemmer-ratiopharm comp | Acenorm hct | Adocomp | Capozide | Capto abz comp | Capto AbZ comp. | Capto comp | Capto comp 1a pharma | Capto Corax Comp | Capto Isis Plus | Capto lich comp | Captobeta comp | Captodoc comp | Captogamma hct | Captohexal comp | Captopril Comp | Captopril comp basics | Captopril comp. | Captopril comp. Heumann | Captopril hct | Captopril hct al | Captopril HCT Atid | Captopril hct denk | Captopril plus | Captopril Verla Plus | Cardiagen hct | Jutacor Comp | Tensobon comp;
  • (DO) Dominican Republic: Capozide | Captoprilan D | Captoril D | Cartazid | Ecapres D;
  • (EC) Ecuador: Capozide;
  • (EE) Estonia: Capozide | Ecazide;
  • (EG) Egypt: Capojed-H | Capozide | Captopril h | Farcopril plus | Hypopress D;
  • (ES) Spain: Alopresin diu | Captopril + Hidroclorotiazida Normon | Captopril+hctz | Captopril+hctz sandoz | Captopril/Hidroclorotiazida qualigen | Cesplon plus | Decresco | Dilabar diu | Ecadiu | Ecazide;
  • (FR) France: Captea | Captopril Hydrochlorothiazide Arrow | Captopril Hydrochlorothiazide Biogaran | Captopril Hydrochlorothiazide Merck | Captopril Hydrochlorothiazide Qualimed | Captopril Hydrochlorothiazide Ratiopharm | Captopril Hydrochlorothiazide Sandoz | Captopril/hydrochlorothiazide Actavis | Captopril/hydrochlorothiazide Cristers | Captopril/hydrochlorothiazide EG | Captopril/hydrochlorothiazide Winthrop | Ecazide;
  • (GB) United Kingdom: Capto co | Co zidocapt | Co zidocapt cox | Co zidocapt kent | Co zidocapt sandoz;
  • (GR) Greece: Anastole | Captopress | Captopril and hydrochorothiazide | Captospes h | Ekzevit | Empirol | Kifarol | Normolose h | Pentatec | Piesital | Return | Sedapressin | Superace | Uresan | Zidepril;
  • (ID) Indonesia: Caporetic | Capozide;
  • (IE) Ireland: Capozide | Captor hct;
  • (IT) Italy: Acediur | Aceplus | Captopril e idroclorotiazide hexal;
  • (JO) Jordan: Capocard plus | Capozide;
  • (KE) Kenya: Captopril+hct denk;
  • (KR) Korea, Republic of: Capotec | Capozide | Captocid | Toprid;
  • (KW) Kuwait: Capozide;
  • (LB) Lebanon: Capozide | Captace Plus | Co-captopril;
  • (LU) Luxembourg: Capozide;
  • (LV) Latvia: Capozid;
  • (MA) Morocco: Capozide;
  • (MX) Mexico: Capozide | Captopril hydrochlorothiazida | Co Altiver | Co-captral | Ecapril compositum;
  • (NL) Netherlands: Aceplus | Capozide | Captopril/Hydrochloorthiazide CF | Captopril/Hydrochloorthiazide Katwijk | Captopril/Hydrochloorthiazide Merck | Captopril/Hydrochloorthiazide PCH | Captopril/Hydrochloorthiazide Sandoz;
  • (NZ) New Zealand: Capozide;
  • (PK) Pakistan: Capozide;
  • (PR) Puerto Rico: Capozide | Captopril and hydrochlorothiazide | Captopril/hctz;
  • (PT) Portugal: Captopril + hidroclorotiazida | Lopiretic;
  • (RU) Russian Federation: Capozid | Capozide | Hydrochlorothiazide + captopril;
  • (SA) Saudi Arabia: Capozide;
  • (SR) Suriname: Captopril+hct denk | Captopril/hydrochloorthiazide;
  • (TH) Thailand: Capozide;
  • (TN) Tunisia: Actozid | Captozid | Co tensopril | Ecazide;
  • (TW) Taiwan: Capozide;
  • (UA) Ukraine: Capocard plus | Capothiazide | Capozide | Captopres | Dosturel | Normopres;
  • (UG) Uganda: Cardiurine;
  • (VE) Venezuela, Bolivarian Republic of: Capozide | Cartazid;
  • (VN) Viet Nam: Captazib;
  • (ZA) South Africa: Capozide | Captoretic;
  • (ZM) Zambia: Captopril+hct denk
  1. 2023 American Geriatrics Society Beers Criteria Update Expert Panel. American Geriatrics Society 2023 updated AGS Beers Criteria for potentially inappropriate medication use in older adults. J Am Geriatr Soc. 2023;71(7):2052-2081. doi:10.1111/jgs.18372 [PubMed 37139824]
  2. Bakris GL, Weir MR. Angiotensin-converting enzyme inhibitor-associated elevations in serum creatinine: is this a cause for concern? Arch Intern Med. 2000;160(5):685-693. doi:10.1001/archinte.160.5.685 [PubMed 10724055]
  3. Brackett CC, Singh H, Block JH. Likelihood and mechanisms of cross-allergenicity between sulfonamide antibiotics and other drugs containing a sulfonamide functional group. Pharmacotherapy. 2004;24(7):856-870. [PubMed 15303450]
  4. Capoten (captopril) [prescribing information]. Chestnut Ridge, NY: Par Pharmaceutical; August 2017.
  5. Captopril [prescribing information]. Weston, FL: Apotex; March 2013.
  6. Captopril and Hydrochlorothiazide [prescribing information]. Morgantown, WV: Mylan Pharmaceuticals Inc; April 2020.
  7. Gurwitz JH, Kalish SC, Bohn RL, et al. Thiazide diuretics and the initiation of anti-gout therapy. J Clin Epidemiol. 1997;50(8):953-959. [PubMed 9291881]
  8. Hillis LD, Smith PK, Anderson JL, et al. 2011 ACCF/AHA Guideline for Coronary Artery Bypass Graft Surgery: executive summary: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines [published corrections appear in Circulation. 2011;124(25):e956 and Circulation. 2012;126(7):e105]. Circulation. 2011;124(23):2610-2642. [PubMed 22064600]
  9. Johnson KK, Green DL, Rife JP, Limon L. Sulfonamide cross-reactivity: fact or fiction? [published correction appears in Ann Pharmacother. 2005;39(7-8):1373]. Ann Pharmacother. 2005;39(2):290-301. [PubMed 15644481]
  10. Ommen SR, Ho CY, Asif IM, et al. 2024 AHA/ACC/AMSSM/HRS/PACES/SCMR guideline for the management of hypertrophic cardiomyopathy: a report of the American Heart Association/American College of Cardiology Joint Committee on Clinical Practice Guidelines. Circulation. 2024;149(23):e1239-e1311. doi:10.1161/CIR.0000000000001250 [PubMed 38718139]
  11. Pedersen SA, Gaist D, Schmidt SAJ, Hölmich LR, Friis S, Pottegård A. Hydrochlorothiazide use and risk of nonmelanoma skin cancer: a nationwide case-control study from Denmark. J Am Acad Dermatol. 2018;78(4):673-681. doi: 10.1016/j.jaad.2017.11.042 [PubMed 29217346]
  12. Pottegård A, Hallas J, Olesen M, et al. Hydrochlorothiazide use is strongly associated with risk of lip cancer. J Intern Med. 2017;282(4):322-331. doi: 10.1111/joim.12629. [PubMed 28480532]
  13. Slatore CG, Tilles SA. Sulfonamide hypersensitivity. Immunol Allergy Clin North Am. 2004;24(3):477-490, vii. [PubMed 15242722]
  14. Tornero P, De Barrio M, Baeza ML, Herrero T. Cross-reactivity among p-amino group compounds in sulfonamide fixed drug eruption: diagnostic value of patch testing. Contact Dermatitis. 2004;51(2):57-62. [PubMed 15373844]
  15. Ziegler O, Sirveaux MA, Brunaud L, Reibel N, Quilliot D. Medical follow up after bariatric surgery: nutritional and drug issues. General recommendations for the prevention and treatment of nutritional deficiencies. Diabetes Metab. 2009;35(6, pt 2):544-557. doi: 10.1016/S1262-3636(09)73464-0. [PubMed 20152742]
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