Hello, I understand and appreciate the concern that you have for your God child. The basic thing to understand here is that consuming alcohol or narcotic drugs while on any medication is strictly forbidden and can cause drastic side effects. Therefore I would strongly advise that you monitor him that he does not continue on such substance abuse. Fenabbott (Phenobarbital) is a sedative hypnotic that is primarily aimed at calming down patients. This can be used under a variety of circumstances. The prime aim during his treatment regime would be to get adequate rest, talking the medications properly, avoiding substance abuse and leading a healthy lifestyle with a healthy diet. Regards, Dr Manoj Pradeep MD