Tretiva 20 and Isotroin 20 is a medication that contains isotretinoin 20mg , a derivative of vitamin A. Isotretinoin 20mg cap is primarily prescribed for the treatment of severe acne (nodular or cystic acne) that has not responded to other treatments like antibiotics or topical medications. https://publicpill.com/shop/isotroin-20mg-capsule-isotretinoin/