my friend (male, 21, over 6 feet but very thin) took about 40mg of alprazolam with a fairly low tolerance about 10 hours ago and drank whiskey although i'm not sure how much and he wasn't either. we brought him back to my house and he was awake and somewhat responsive (talking, able to walk although clumsy, drinking water, etc). now he's asleep and i'm watching him. his breathing doesn't seem shallow or slow at all and he's moving around like he normally does while sleeping. basically i was wondering if the time for concern has passed or if he could still stop breathing in his sleep at this point.