If you have acne, you probably have tried many over the counter acne medication for that. But sometimes you need something stronger. There is a class of drugs called retinoids, which are derived from vitamin A. Tretinoin is a part of this group of drugs. Tretinoine is the active ingredient in many medicines, including Retin A. If your doctor thinks Retin A can help your acne, you get a prescription for her. It comes in different forms, such as gel or cream. It also comes in different strengths.
Source: Health and Fitness: Acne Articles from EzineArticles.com
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