Tretinoin: As we said above, tretinoin (common brand name: Retin-A) is a synthetic retinoid, but it is stronger than some of the other options, and its cousin, isotretinoin, is even stronger. Isotretinoin, better known as Accutane, is an oral synthetic retinoid typically only prescribed for very severe cases of cystic acne because it can cause intense side effects and is a powerful teratogen, meaning it causes birth defects. However, after taking isotretinoin for several months, many people never need to do any serious acne treatment again, so for some, it is well worth the side effects.
Acne treatment that you apply to the skin: Most acne treatments are applied to the skin. Your dermatologist may call this topical treatment. There are many topical acne treatments. Some topicals help kill the bacteria. Others work on reducing the oil. The topical medicine may contain a retinoid, prescription-strength benzoyl peroxide, antibiotic, or even salicylic acid. Your dermatologist will determine what you need.