I can speak about ths one from personal experience. Adderall seems to overide the affect of alcohol, making the person feel as if they can drink more without getting drunk. The problem there is, although they may not feel as drunk the alcohol still has the same affect on their body and can lead to alcohol poisoning without the person even realizing that they are that wasted. Your son should definately watch the amount of alcohol he takes in, and know what his limit is before he starts.