By this, I mean alcohol has the tendency of suppressing ones emotion and brain functionality. So by this, we can say for sure that it is not just considered but it is a drug on it own.

yes alcohol has a way of suppressing one's emotion and that is why people that are depressed takes this harmful substance into their body and I also agree with you that excessive alcohol is a disease. Excessive intake of alcohol is no doubt a disease that affects us emotionally, physically and socially