Isotretinoin is an anti-acne medication that is chemically related to retinoic acid and retinol (vitamin A). Although its exact mode of action is unknown, this agent works by inhibiting sebaceous gland functioning, which diminishes oil production in the skin and hinders acne development. This product is sold in many countries throughout the world, and is largely recognized as one of the most effective medications available for treating severe acne. Studies also suggest that it has one of the highest success rates with even the strongest cases of clinical acne. Given that acne is one of the most common side effects of anabolic/androgenic steroid use, isotretinoin is utilized by bodybuilders and athletes to reduce or eliminate this cosmetic issue during steroid therapy. Isotretinoin was developed by the pharmaceutical company Hoffmann-La Roche, and was first introduced as a drug medication in 1982. The company marketed it under the brand name of Accutane, and retained the patent rights until 2002. Now that the patent has expired, there are a number of generic versions of the drug available. Isotretinoin is not a controlled substance, but has been regulated by the FDA in recent years due to potential side effects. Due to this, there are some very strict guidelines in place for prescribing the drug. Isotretinoin is most commonly supplied in soft gel like capsules of 10, 20, and 40mg.