I started smelling cigarette smoke back in April when I finished taking some heavy-duty pain meds for a bad back sprain. That is the only thing new or different that I introduced to my body. Now ever since then I will randomly smell smoke. My family thinks I m nuts but it is so real it is like someone sitting next to me smoking. I have mild seasonal allergies. I was prompted to get on the net and find out about "phantom smells" after watching and episode of "LOST".