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Benzamycin

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Benzamycin

Benzamycin® Pak
(erythromycin 3%-benzoyl peroxide 5%) Topical Gel
For Dermatological Use Only Not for Ophthalmic Use

DRUG DESCRIPTION

Benzamycin® Pak contains erythromycin [(3R*, 4S*, 5S*, 6R*, 7R*, 9R*, 11R*, 12R*, 13S*, 14R*)-4-[(2,6- dideoxy-3-C-methyl-3-O-methyl-a- L-ribo-hexopyranosyl)-oxy]-14- ethyl-7,12,13-trihydroxy- 3,5,7,9,11,13-hexa-methyl-6-[ [3,4,6-trideoxy-3-(dimethylamino)-b-D- xylo-hexopyranosyl] oxy]oxacyclotetradecane-2,10- dione]. Erythromycin is a macrolide antibiotic produced from a strain of Saccharopolyspora erythraea (formerly Streptomyces erythreus). It is a base and readily forms salts with acids. Chemically, erythromycin is (C37H67NO13).  It has the following structural formula:

Erythromycin has the molecular weight of 733.94. It is a white crystalline powder and has a solubility of approximately 1 mg/mL in water and is soluble in alcohol at 25°C. Benzamycin (erythromycin) ® Pak also contains benzoyl peroxide for topical use. Benzoyl peroxide is an oxidizing agent demonstrating antibacterial activity. Chemically, benzoyl peroxide is (C14H10O4).  It has the following structural formula:

Benzoyl peroxide has the molecular weight of 242.23. It is a white granular powder and is sparingly soluble in water and alcohol and soluble in acetone, chloroform and ether. Each gram of product, as dispensed, contains 30 mg of erythromycin and 50 mg of benzoyl peroxide in a base of SD Alcohol 40B, purified water, hydroxypropyl cellulose, carbomer 934, sodium hydroxide, dioctyl sodium sulfosuccinate 75%. Each Benzamycin (erythromycin) ® Pak contains 0.8 grams of product.

What are the possible side effects of benzoyl peroxide and erythromycin topical (Benzamycin)?

Serious side effects are not likely to occur. Stop using benzoyl peroxide and erythromycin topical and seek emergency medical attention if you experience an allergic reaction (shortness of breath; closing of the throat; swelling of the lips, face, or tongue; or hives).

You may experience some skin burning, stinging, tingling, itching, redness, dryness, peeling, or irritation while using benzoyl peroxide topical. If these side effects are excessive, apply benzoyl peroxide and erythromycin topical less often.

Side effects other than those listed...

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What are the precautions when taking erythromycin (Benzamycin)?

Before using this product, tell your doctor or pharmacist if you are allergic to erythromycin or benzoyl peroxide; or to other macrolide antibiotics (such as azithromycin, clarithromycin); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history.

This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths, and sunlamps. Use a sunscreen and wear a hat or other protective clothing when outdoors.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription...

Read All Potential Precautions of Benzamycin »

Last reviewed on RxList: 6/10/2008
This monograph has been modified to include the generic and brand name in many instances.

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Benzamycin - User Reviews

Benzamycin User Reviews

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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