Praise be to Allaah.
Smoking is haraam, because it is evil and because it causes a great deal of harm. Allaah has permitted to His slaves only good kinds of food and drink, and He has forbidden the bad kinds. Allaah says (interpretation of the meaning):
“he allows them as lawful At Tayyibaat (i.e. all good and lawful as regards things, deeds, beliefs, persons and foods), and prohibits them as unlawful Al Khabaa’ith (i.e. all evil and unlawful as regards things, deeds, beliefs, persons and foods)”[al-A’raaf 7:157]
All forms of smoking are kinds of khabaa’ith (evil and unlawful things), and they include harmful and intoxicating substances. It is haraam to deal with it in any way, whether one inhales it, chews it or deals with it in any of its other forms. It is obligatory upon every Muslim to give up these things and to hasten to repent to Allaah, and to regret having committed this sin, and to resolve never to go back to it. May Allaah help us and you to do all that is good.