Thank you for your questions. Here are the specific answers to your questions:
1. Alcohol intake is strongly discouraged while on Accutane. Accutane can cause liver damage and alcohol may increase the likelihood of this side effect. Practically speaking, however, a glass of wine or a single beer once a week or rarely, is fine, but drinking more or drinking more often is strongly discouraged and I would avoid it for the short time you are on Accutane.
2. Accutane does not affect your workouts or exercising. However, Accutane can cause muscle and joint discomfort and this might impact your exercise choices.
3. Vitamin A supplementation of any kind is discouraged while on Accutane. I would avoid taking the protein shake, or choose one that does not have Vitamin A added.
Good luck!
