Research suggests that one serving of alcohol per day will not harm people with PCS, and the relaxation effect may even be beneficial. Your body heals better when it's not under stress, so a small amount should be fine.

Intoxication should be avoided, but just listen to your body. If a few drinks has no ill effects and no new symptoms arise or get worse, I see no reason to worry. Symptoms are how your body communicates to your mind, so listen to them.

Enjoy.