ISRADIPINE- isradipine capsule
Epic Pharma, LLC
DESCRIPTION
Isradipine is a calcium antagonist available for oral administration in capsules containing 2.5 mg or 5 mg. The structural formula of isradipine is:
Structural formula of Isradipine
Chemically, isradipine is 3,5-Pyridinedicarboxylic acid, 4-(4-benzofurazanyl)-1,4-dihydro-2,6-dimethyl-,methyl 1-methylethyl ester. Isradipine is a yellow, fine crystalline powder which is odorless or has a faint characteristic odor. Isradipine is practically insoluble in water (<10 mg/L at 37�C), but is soluble in ethanol and freely soluble in acetone, chloroform and methylene chloride.
Active Ingredient: isradipine
Inactive Ingredients: colloidal silicon dioxide, corn starch, gelatin, lactose monohydrate, microcrystalline cellulose, polyethylene glycol, red iron oxide (5 mg), sodium lauryl sulfate, and titanium dioxide.
Black ink contains the following ingredients: Black Iron Oxide, D&C Yellow #10 Aluminum Lake, FD&C Blue #1 Aluminum Lake, FD&C Blue #2 Aluminum Lake, FD&C Red #40 Aluminum Lake, n-Butyl Alcohol, Propylene Glycol, and Shellac Glaze in SD-45 Alcohol.
CLINICAL PHARMACOLOGY
Mechanism of Action
Isradipine is a dihydropyridine calcium channel blocker. It binds to calcium channels with high affinity and specificity and inhibits calcium flux into cardiac and smooth muscle. The effects observed in mechanistic experiments in vitro and studied in intact animals and man are compatible with this mechanism of action and are typical of the class.
Except for diuretic activity, the mechanism of which is not clearly understood, the pharmacodynamic effects of isradipine observed in whole animals can also be explained by calcium channel blocking activity, especially dilating effects in arterioles which reduce systemic resistance and lower blood pressure, with a small increase in resting heart rate. Although like other dihydropyridine calcium channel blockers, isradipine has negative inotropic effects in vitro , studies conducted in intact anesthetized animals have shown that the vasodilating effect occurs at doses lower than those which affect contractility. In patients with normal ventricular function, isradipine's afterload reducing properties lead to some increase in cardiac output.
Effects in patients with impaired ventricular function have not been fully studied.
