Pays: États-Unis
Langue: anglais
Source: NLM (National Library of Medicine)
CAPTOPRIL (UNII: 9G64RSX1XD) (CAPTOPRIL - UNII:9G64RSX1XD)
Bryant Ranch Prepack
ORAL
PRESCRIPTION DRUG
Captopril tablets USP are indicated for the treatment of hypertension. Hypertension : In using captopril, consideration should be given to the risk of neutropenia/ agranulocytosis (see ). WARNINGS Captopril may be used as initial therapy for patients with normal renal function, in whom the risk is relatively low. In patients with impaired renal function, particularly those with collagen vascular disease, captopril should be reserved for hypertensives who have either developed unacceptable side effects on other drugs, or have failed to respond satisfactorily to drug combinations. Captopril is effective alone and in combination with other antihypertensive agents, especially thiazide-type diuretics. The blood pressure lowering effects of captopril and thiazides are approximately additive. Captopril tablets are indicated in the treatment of congestive heart failure usually in combination with diuretics and digitalis. The beneficial effect of captopril in hea
Abbreviated New Drug Application
CAPTOPRIL- CAPTOPRIL TABLET BRYANT RANCH PREPACK ---------- CAPTOPRIL TABLETS, USP DESCRIPTION Captopril is a specific competitive inhibitor of angiotensin I-converting enzyme (ACE), the enzyme responsible for the conversion of angiotensin I to angiotensin II. Captopril is designated chemically as 1-[(2S)-3-mercapto-2-methylpropionyl]-L-proline. Molecular formula C H NO S [MW 217.29] and has the following structural formula: Captopril is a white to off-white crystalline powder that may have a slight sulfurous odor; it is soluble in water (approx. 160 mg/mL), methanol, and ethanol and sparingly soluble in chloroform and ethyl acetate. Each scored tablet, for oral administration, contains 12.5 mg, 25 mg, 50 mg or 100 mg of captopril. In addition, each tablet contains the following inactive ingredients: microcrystalline cellulose, corn starch, anhydrous lactose, colloidal silicon dioxide, talc and palmitic acid. CLINICAL PHARMACOLOGY MECHANISM OF ACTION The mechanism of action of captopril has not yet been fully elucidated. Its beneficial effects in hypertension and heart failure appear to result primarily from suppression of the renin-angiotensin- aldosterone system. However, there is no consistent correlation between renin levels and response to the drug. Renin, an enzyme synthesized by the kidneys, is released into the circulation where it acts on a plasma globulin substrate to produce angiotensin I, a relatively inactive decapeptide. Angiotensin I is then converted by angiotensin converting enzyme (ACE) to angiotensin II, a potent endogenous vasoconstrictor substance. Angiotensin II also stimulates aldosterone secretion from the adrenal cortex, thereby contributing to sodium and fluid retention. Captopril prevents the conversion of angiotensin I to angiotensin II by inhibition of ACE, a peptidyldipeptide carboxy hydrolase. This inhibition has been demonstrated in both healthy human subjects and in animals by showing that the elevation of blood pressure caused by exogenously administered angiotensin I was attenua Lire le document complet