Dr. Zakir Naik answered the question of a person is asking regarding smoking is Haram or Halal even eating pan as well. He replied "Smoking is a slow poizoning method effecting your body and by this you are actually killing your self by your own hands.Which means you are dieing by your own hands. That is what is Haram In Islam. You can not harm your self by your own hands. So basically by taking any tobacco which is harming your body is haram".
You can watch the video explained by Zakir Naik that why smoking is Haram in Islam.