Alcohol and smoking:
Strictly not advisable. We had a few in our group who had a good time every night, but that’s a very risky business at high altitudes! Am glad that none in our group had any AMS (Acute Mountain Sickness) or similar complications on our trek, but we did hear from our leaders, very fatal stories of incidents that took place on their previous treks.
According to their flashback, some were carried back to the previous day’s altitude, and one person died apparently of AMS. As you know, freakin’ AMS has no medical way of knowing beforehand if anyone can possibly suffer from the condition. And there is nothing that can be done after it happens, other than getting back to previous day’s altitude and waiting there for things to get normal. And, alcohol/ smoking reduces the oxygen processing capacity of the body and can lead to AMS. Very very risky business where emergency means, people carrying you on their shoulders for a day or two to get to the nearest clinic/ medical center!