Tretinoin is a topical wrinkle and acne therapy cream. You may be familiar with it by brand names such as Retin-A and Renova, to name a few. Tretinoin is not available over the counter, thus you must purchase it with a prescription from a healthcare provider or dermatologist. Getting tretinoin, on the other hand, may not be as tough as you think. Here's all you need to know about getting a...