1% to 10%:
Cardiovascular: Hypotension (1% to 3%), tachycardia (1%), chest pain (1%), palpitation (1%)
Dermatologic: Rash (maculopapular or urticarial) (4% to 7%), pruritus (2%); in patients with rash, a positive ANA and/or eosinophilia has been noted in 7% to 10%.
Endocrine & metabolic: Hyperkalemia (1% to 11%)
Hematologic: Neutropenia may occur in up to 4% of patients with renal insufficiency or collagen-vascular disease.
Renal: Proteinuria (1%), increased serum creatinine, worsening of renal function (may occur in patients with bilateral renal artery stenosis or hypovolemia)
Respiratory: Cough (<1% to 2%)
Miscellaneous: Hypersensitivity reactions (rash, pruritus, fever, arthralgia, and eosinophilia) have occurred in 4% to 7% of patients (depending on dose and renal function); dysgeusia - loss of taste or diminished perception (2% to 4%)
Frequency not defined:
Cardiovascular: Angioedema, cardiac arrest, cerebrovascular insufficiency, rhythm disturbances, orthostatic hypotension, syncope, flushing, pallor, angina, MI, Raynaud's syndrome, CHF
Central nervous system: Ataxia, confusion, depression, nervousness, somnolence
Dermatologic: Bullous pemphigus, erythema multiforme, Stevens-Johnson syndrome, exfoliative dermatitis
Endocrine & metabolic: Alkaline phosphatase increased, bilirubin increased, gynecomastia
Gastrointestinal: Pancreatitis, glossitis, dyspepsia
Genitourinary: Urinary frequency, impotence
Hematologic: Anemia, thrombocytopenia, pancytopenia, agranulocytosis, anemia
Hepatic: Jaundice, hepatitis, hepatic necrosis (rare), cholestasis, hyponatremia (symptomatic), transaminases increased
Neuromuscular & skeletal: Asthenia, myalgia, myasthenia
Ocular: Blurred vision
Renal: Renal insufficiency, renal failure, nephrotic syndrome, polyuria, oliguria
Respiratory: Bronchospasm, eosinophilic pneumonitis, rhinitis
Miscellaneous: Anaphylactoid reactions
<1% (Limited to important or life-threatening symptoms; frequency
to placebo): Gastric irritation, abdominal pain, nausea, vomiting, diarrhea, anorexia, constipation, aphthous ulcers, peptic ulcer, dizziness, headache, malaise, fatigue, insomnia, xerostomia, dyspnea, alopecia, paresthesia, angina, glomerulonephritis, cholestatic jaundice, psoriasis, hyperthermia, myalgia, arthralgia
Postmarketing and/or case reports: Aplastic anemia, hemolytic anemia, bronchospasm, alopecia, systemic lupus erythematosus, Kaposi's sarcoma, pericarditis, exacerbations of Huntington's disease, Guillain-Barré syndrome, seizure (in premature infants). A syndrome which may include fever, myalgia, arthralgia, interstitial nephritis, vasculitis, rash, eosinophilia, and elevated ESR has been reported for captopril and other ACE inhibitors.
Allopurinol: Case reports (rare) indicate a possible increased risk of Stevens-Johnson syndrome when combined with captopril.
Alpha1 blockers: Hypotensive effect increased.
Aspirin: The effects of ACE inhibitors may be blunted by aspirin administration, particularly at higher dosages (see Cardiovascular Considerations) and/or increase adverse renal effects.
CYP2D6 inhibitors: May increase the levels/effects of captopril. Example inhibitors include chlorpromazine, delavirdine, fluoxetine, miconazole, paroxetine, pergolide, quinidine, quinine, ritonavir, and ropinirole.
Diuretics: Hypovolemia due to diuretics may precipitate acute hypotensive events or acute renal failure.
Insulin: Risk of hypoglycemia may be increased.
Lithium: Risk of lithium toxicity may be increased; monitor lithium levels, especially the first 4 weeks of therapy.
Mercaptopurine: Risk of neutropenia may be increased.
NSAIDs: May attenuate hypertensive efficacy; effect has been seen with captopril and may occur with other ACE inhibitors; monitor blood pressure. May increase adverse renal effects.
Potassium-sparing diuretics (amiloride, potassium, spironolactone, triamterene): Increased risk of hyperkalemia.
Potassium supplements may increase the risk of hyperkalemia.
Trimethoprim (high dose) may increase the risk of hyperkalemia.
Food: Captopril serum concentrations may be decreased if taken with food. Long-term use of captopril may result in a zinc deficiency which can result in a decrease in taste perception.
Herb/Nutraceutical: Avoid dong quai if using for hypertension (has estrogenic activity). Avoid ephedra, yohimbe, ginseng (may worsen hypertension). Avoid garlic (may have increased antihypertensive effect).
Onset of action: Peak effect: Blood pressure reduction: 1-1.5 hours after dose
Duration: Dose related, may require several weeks of therapy before full hypotensive effect
Absorption: 60% to 75%; reduced 30% to 40% by food
Protein binding: 25% to 30%
Metabolism: 50%
Half-life elimination (renal and cardiac function dependent):
Adults, healthy volunteers: 1.9 hours; Congestive heart failure: 2.06 hours; Anuria: 20-40 hours
Excretion: Urine (95%) within 24 hours
Infants: Initial: 0.15-0.3 mg/kg/dose; titrate dose upward to maximum of 6 mg/kg/day in 1-4 divided doses; usual required dose: 2.5-6 mg/kg/day
Children: Initial: 0.5 mg/kg/dose; titrate upward to maximum of 6 mg/kg/day in 2-4 divided doses
Older Children: Initial: 6.25-12.5 mg/dose every 12-24 hours; titrate upward to maximum of 6 mg/kg/day
Adolescents: Initial: 12.5-25 mg/dose given every 8-12 hours; increase by 25 mg/dose to maximum of 450 mg/day
Adults:
Acute hypertension (urgency/emergency): 12.5-25 mg, may repeat as needed (may be given sublingually, but no therapeutic advantage demonstrated)
Hypertension:
Initial dose: 12.5-25 mg 2-3 times/day; may increase by 12.5-25 mg/dose at 1- to 2-week intervals up to 50 mg 3 times/day; maximum dose: 150 mg 3 times/day; add diuretic before further dosage increases
Usual dose range (JNC 7): 25-100 mg/day in 2 divided doses
Congestive heart failure:
Initial dose: 6.25-12.5 mg 3 times/day in conjunction with cardiac glycoside and diuretic therapy; initial dose depends upon patient's fluid/electrolyte status
Target dose: 50 mg 3 times/day
Maximum dose: 150 mg 3 times/day
LVD after MI: Initial dose: 6.25 mg followed by 12.5 mg 3 times/day; then increase to 25 mg 3 times/day during next several days and then over next several weeks to target dose of 50 mg 3 times/day
Diabetic nephropathy: 25 mg 3 times/day; other antihypertensives often given concurrently
Dosing adjustment in renal impairment:
Clcr 10-50 mL/minute: Administer at 75% of normal dose.
Clcr<10 mL/minute: Administer at 50% of normal dose.
Note: Smaller dosages given every 8-12 hours are indicated in patients with renal dysfunction; renal function and leukocyte count should be carefully monitored during therapy.
Hemodialysis: Moderately dialyzable (20% to 50%); administer dose postdialysis or administer 25% to 35% supplemental dose.
Peritoneal dialysis: Supplemental dose is not necessary.
ACE inhibitors are indicated in patients postmyocardial infarction in whom left ventricular ejection fraction is <40%. When used in patients with heart failure, the target dose of 50 mg 3 times/day should be achieved, if possible. Lower daily doses of ACE inhibitors have not demonstrated the same cardioprotective effects.
ACE inhibitor therapy may elicit rapid increases in potassium and creatinine, especially when used in patients with bilateral renal artery stenosis. When ACE inhibition is introduced in patients with pre-existing diuretic therapy who are hypovolemic, the ACE inhibitor may induce acute hypotension. Because of the potent teratogenic effects of ACE inhibitors, these drugs should be avoided, if possible, when treating women of childbearing potential not on effective birth control measures.
ACE inhibitors decrease morbidity and mortality in patients with asymptomatic and symptomatic left ventricular dysfunction. In this situation, they decrease hospitalizations for, and retard progression to, congestive heart failure. According to 2004 ACC/AHA STEMI guidelines, an ACE inhibitor should be administered orally within the first 24 hours of STEMI to patients with anterior infarction, pulmonary congestion or LVEF <0.4, in the absence of hypotension or known contraindications to that class of medicines. In the emergency management of complicated STEMI, a short-acting ACEI (eg, captopril 1-6.25 mg) may be added once the patient's systolic blood pressure is >100 mm Hg and not <30 mm Hg below baseline. When used in patients with heart failure, the target dose of 50 mg 3 times/day should be achieved, if possible. Lower daily doses of ACE inhibitors have not demonstrated the same cardioprotective effects. ACE inhibitors have renal protective effects in patients with proteinuria and possibly cardioprotective effects in high-risk patients.
ACE inhibitor therapy may elicit rapid increases in potassium and creatinine, especially when used in patients with bilateral renal artery stenosis. When ACE inhibition is introduced in patients with pre-existing diuretic therapy who are hypovolemic, the ACE inhibitor may induce acute hypotension. In those patients experiencing cough on an ACE inhibitor, the ACE inhibitor may be discontinued and, if necessary, angiotensin receptor blocker therapy instituted. Concomitant indomethacin therapy may blunt the reduction in sitting and 24-hour ambulatory diastolic blood pressure; use of NSAIDs should be avoided or limited, with monitoring of blood pressure control in this setting. In patients with heart failure, NSAID use may be associated with an increased risk for fluid accumulation and edema. Because of the potent teratogenic effects of ACE inhibitors, these drugs should be avoided, if possible, when treating women of childbearing potential not on effective birth control measures.
In the treatment of unstable angina/non-ST-segment elevation MI, ACE inhibitors are recommended when hypertension persists despite treatment with nitroglycerin and a beta-blocker in patients with LV systolic dysfunction or CHF and in ischemic patients with diabetes (Class I). ACE inhibitors are also recommended for all post-ACS individuals (Class IIa).
Powder papers can also be made; powder papers are stable for 12 weeks when stored at room temperature
Allen LV and Erickson III MA, "Stability of Baclofen, Captopril, Diltiazem Hydrochloride, Dipyridamole, and Flecainide Acetate in Extemporaneously Compounded Oral Liquids," Am J Health Syst Pharm , 1996, 53:2179-84.
Nahata MC, Morosco RS, and Hipple TF, "Stability of Captopril in Three Liquid Dosage Forms," Am J Hosp Pharm , 1994, 51(1):95-96.
Taketomo CK, Chu SA, Cheng MH, et al, "Stability of Captopril in Powder Papers Under Three Storage Conditions," Am J Hosp Pharm , 1990;47(8):1799-1801.
Antman EM, Anbe SC, Alpert JS, et al, "ACC/AHA Guidelines for the Management of Patients With ST-Elevation Myocardial Infarction - Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 1999 Guidelines for the Management of Patients With Acute Myocardial Infarction)," Circulation, 2004, 110:588-636. Available at: http://www.circulationaha.org/cgi/content/full/110/5/588. Last accessed October 26, 2004.
Braunwald E, Antman EM, Beasley JW, et al, "ACC/AHA 2002 Guideline Update for the Management of Patients With Unstable Angina and Non-ST-Segment Elevation Myocardial Infarction - Summary Article: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee on the Management of Patients With Unstable Angina)," J Am Coll Cardiol , 2002, 40(7):1366-74. Available at: http://www.acc.org/clinical/guidelines/unstable/incorporated/index.htm. Accessed May 20, 2003.
Chase MP, Fiarman GS, Scholz FJ, et al, "Angioedema of the Small Bowel Due to an Angiotensin-Converting Enzyme Inhibitor," J Clin Gastroenterol , 2000, 31(3):254-7.
Chobanian AV, Bakris GL, Black HR, et al, "The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure: The JNC 7 Report," JAMA , 2003, 289(19):2560-71.
Conlin P, Moore T, Swartz S, et al, "Effect of Indomethacin on Blood Pressure Lowering by Captopril and Losartan in Hypertensive Patients," Hypertension , 2000, 36(3):461-5.
"Consensus Recommendations for the Management of Chronic Heart Failure. On Behalf of the Membership of the Advisory Council to Improve Outcomes Nationwide in Heart Failure," Am J Cardiol , 1999, 83(2A):1A-38A.
Hunt SA, Baker DW, Chin MH, et al, "ACC/AHA Guidelines for the Evaluation and Management of Chronic Heart Failure in the Adult: Executive Summary. A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Revise the 1995 Guidelines for the Evaluation and Management of Heart Failure)," J Am Coll Cardiol , 2001, 38(7):2101-13.
"K/DOQI Clinical Practice Guidelines for Chronic Kidney Disease: Evaluation, Classification, and Stratification. Kidney Disease Outcome Quality Initiative," Am J Kidney Dis , 2002, 39(2 Suppl 2):1-246. Available at: http://www.kidney.org/professionals/doqi/kdoqi/toc.htm. Accessed August 1, 2003.
Packer M, Poole-Wilson PA, Armstrong PW, et al, "Comparative Effects of Low and High Doses of the Angiotensin-Converting Enzyme Inhibitor, Lisinopril, on Morbidity and Mortality in Chronic Heart Failure," Circulation , 1999, 100(23):2312-8.
Pfeffer MA, Greaves SC, Arnold JM, et al, "Early Versus Delayed Angiotensin-Converting Enzyme Inhibition Therapy in Acute Myocardial Infarction. The Healing and Early Afterload Reducing Therapy Trial," Circulation , 1997, 95(12):2643-51.
Smoger SH and Sayed MA, "Simultaneous Mucosal and Small Bowel Angioedema Due to Captopril," South Med J , 1998, 91(11):1060-3.
|
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is the first of its kind, requiring compliance with 53 standards of quality and accountability, verified by independent audit. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial process . A.D.A.M. is also a founding member of Hi-Ethics (www.hiethics.com) and subscribes to the principles of the Health on the Net Foundation (www.hon.ch). |