Comment
Author: Admin | 2025-04-28
Package insert / product labelGeneric name: clindamycin hydrochlorideDosage form: capsuleDrug class: Lincomycin derivatives Clindamycin Capsules Description Clindamycin hydrochloride, USP is the hydrated hydrochloride salt of clindamycin. Clindamycin is a semisynthetic antibiotic produced by a 7(S)-chloro-substitution of the 7(R)-hydroxyl group of the parent compound lincomycin. Clindamycin Hydrochloride Capsules, USP contain clindamycin hydrochloride, USP equivalent to 75 mg, 150 mg, or 300 mg of clindamycin. Inactive ingredients: colloidal silicon dioxide, corn starch, lactose monohydrate, magnesium stearate and talc. The capsule shells contain FD&C blue no. 1, gelatin, iron oxide yellow (75 mg and 150 mg only) and titanium dioxide. The black imprinting ink contains black iron oxide, potassium hydroxide, propylene glycol and shellac. The structural formula is represented below: The chemical name for clindamycin hydrochloride is Methyl 7-chloro-6,7,8-trideoxy-6- (1-methyl- trans-4-propyl-L-2-pyrrolidinecarboxamido)-1-thio-L- threo-α-D- galacto-octopyranoside monohydrochloride. FDA approved dissolution test specifications differ from USP. Clindamycin Capsules - Clinical Pharmacology Human Pharmacology Absorption Pharmacokinetic studies with a 150 mg oral dose of clindamycin hydrochloride in 24 normal adult volunteers showed that clindamycin was rapidly absorbed after oral administration. An average peak serum concentration of 2.50 mcg/mL was reached in 45 minutes; serum concentrations averaged 1.51 mcg/mL at 3 hours and 0.70 mcg/mL at 6 hours. Absorption of an oral dose is virtually complete (90%), and the concomitant administration of food does not appreciably modify the serum concentrations; serum concentrations have been uniform and predictable from person to person and dose to dose. Pharmacokinetic studies following multiple doses of clindamycin hydrochloride for up to 14 days show no evidence of accumulation or altered metabolism of drug. Doses of up to 2 grams of clindamycin per day for 14 days have been well tolerated by healthy volunteers, except that the incidence of gastrointestinal side effects is greater with the higher doses. Distribution Concentrations of clindamycin in the serum increased linearly with increased dose. Serum concentrations exceed the MIC (minimum inhibitory concentration) for most indicated organisms for at least six hours following administration of the usually recommended doses. Clindamycin is widely distributed in body fluids and tissues (including bones). No significant concentrations of clindamycin are attained in the cerebrospinal fluid, even in the presence of inflamed meninges. Metabolism In vitrostudies in human liver and intestinal microsomes indicated that clindamycin is predominantly metabolized by Cytochrome P450 3A4 (CYP3A4), with minor contribution from CYP3A5, to form clindamycin sulfoxide and a minor metabolite, N- desmethylclindamycin. Excretion The average biological half-life is 2.4 hours. Approximately 10% of the bioactivity is excreted in the urine and 3.6% in the feces; the remainder is excreted as bioinactive metabolites. Specific Populations Patients with Renal/Hepatic Impairment The elimination half-life of clindamycin is increased slightly in patients with markedly reduced renal or hepatic function. Hemodialysis and peritoneal dialysis
Add Comment