Clindamycin And Benzoyl Peroxide

Description

DESCRIPTION Clindamycin and benzoyl peroxide topical gel, 1%/5% contains clindamycin phosphate, (7(S)-chloro-7-deoxylincomycin-2-phosphate). Clindamycin phosphate is a water soluble ester of the semi-synthetic antibiotic produced by a 7(S)-chloro-substitution of the 7(R)-hydroxyl group of the parent antibiotic lincomycin. Chemically, clindamycin phosphate is (C 18 H 34 ClN 2 O 8 PS). The structural formula for clindamycin is represented below: Clindamycin phosphate has a molecular weight of 504.97 and its chemical name is Methyl 7-chloro-6,7,8-trideoxy-6-(1-methyl-trans-4-propyl-L-2-pyrrolidinecarboxamido) - 1-thio-L- threo-alpha-D-galacto-octopyranoside 2-(dihydrogen phosphate). Clindamycin and benzoyl peroxide topical gel, 1%/5% also contains benzoyl peroxide, for topical use. Chemically, benzoyl peroxide is (C 14 H 10 O 4 ). It has the following structural formula: Benzoyl peroxide has a molecular weight of 242.23. Each gram of clindamycin and benzoyl peroxide topical gel, 1%/5% contains, as dispensed, 10 mg (1%) clindamycin as phosphate and 50 mg (5%) benzoyl peroxide in a base of carbomer homopolymer type C, sodium hydroxide, dioctyl sodium sulfosuccinate, and purified water. Chemical Structure Chemical Structure

What Is Clindamycin And Benzoyl Peroxide Used For?

INDICATIONS AND USAGE Clindamycin and benzoyl peroxide topical gel, 1%/5% is indicated for the topical treatment of acne vulgaris.

Dosage and Administration

DOSAGE AND ADMINISTRATION Clindamycin and benzoyl peroxide topical gel, 1%/5% should be applied twice daily, morning and evening, or as directed by a physician, to affected areas after the skin is gently washed, rinsed with warm water and patted dry.

Side Effects (Adverse Reactions)

ADVERSE REACTIONS During clinical trials, the most frequently reported adverse event in the clindamycin and benzoyl peroxide topical gel, 1%/5% treatment group was dry skin (12%). The Table below lists local adverse events reported by at least 1% of patients in the clindamycin and benzoyl peroxide topical gel, 1%/5% and vehicle groups. Local Adverse Events – all causalities in >/= 1% of patients Clindamycin and benzoyl peroxide topical gel, 1%/5% n=420 Vehicle n=168 Application site reaction 13 (3%) 1 (<1%) Dry skin 50 (12%) 10 (6%) Pruritus 8 (2%) 1 (<1%) Peeling 9 (2%) - Erythema 6 (1%) 1 (<1%) Sunburn 5 (1%) - The actual incidence of dry skin might have been greater were it not for the use of a moisturizer in these studies. Anaphylaxis, as well as allergic reactions leading to hospitalization, have been reported during post-marketing use of clindamycin/benzoyl peroxide products. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Contraindications

CONTRAINDICATIONS Clindamycin and benzoyl peroxide topical gel, 1%/5% is contraindicated in those individuals who have shown hypersensitivity to any of its components or to lincomycin. It is also contraindicated in those having a history of regional enteritis, ulcerative colitis, or antibiotic-associated colitis.

Pregnancy and Breastfeeding

Pregnancy: Teratogenic Effects: Pregnancy Category C: Animal reproductive/developmental toxicity studies have not been conducted with clindamycin and benzoyl peroxide topical gel, 1%/5% or benzoyl peroxide. Developmental toxicity studies performed in rats and mice using oral doses of clindamycin up to 600 mg/kg/day (240 and 120 times amount of clindamycin in the highest recommended adult human dose based on mg/m 2 , respectively) or subcutaneous doses of clindamycin up to 250 mg/kg/day (100 and 50 times the amount of clindamycin in the highest recommended adult human dose based on mg/m 2 , respectively) revealed no evidence of teratogenicity. There are no well-controlled trials in pregnant women treated with clindamycin and benzoyl peroxide topical gel, 1%/5%. It also is not known whether clindamycin and benzoyl peroxide topical gel, 1%/5% can cause fetal harm when administered to a pregnant woman.

Nursing Women: It is not known whether clindamycin and benzoyl peroxide topical gel, 1%/5% is excreted in human milk after topical application. However, orally and parenterally administered clindamycin has been reported to appear in breast milk. Because of the potential for serious adverse reactions in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

How Supplied

HOW SUPPLIED AND COMPOUNDING INSTRUCTIONS Size (Net Weight) NDC 45802 Benzoyl Peroxide Gel Active Clindamycin Powder (In plastic vial) Purified Water To Be Added to each vial 25 grams 509 -01 19.7g 0.3g 5 mL 35 grams (pump) 510 -03 27.6g 0.4g 7 mL 50 grams 507 -02 39.4g 0.6g 10 mL 50 grams (pump) 507 -04 39.4g 0.6g 10 mL Prior to dispensing, tap the vial until powder flows freely. Add indicated amount of purified water to the vial (to the mark) and immediately shake to completely dissolve clindamycin. If needed, add additional purified water to bring level up to the mark. Add the solution in the vial to the gel and stir until homogenous in appearance (1 to 1½ minutes). For the 35 and 50 gram pumps only, reassemble jar with pump dispenser. Clindamycin and benzoyl peroxide topical gel, 1%/5% (as reconstituted) can be stored at room temperature up to 25°C (77°F) for 3 months. Place a 3 month expiration date on the label immediately following mixing.