I have been having strange smells occurring almost daily that no one else seems to smell. Its a dirty ashtray smell, or a dirty vent type odor. I other words...it stinks! I do have essential tremor and take zonisimidem clonazapam and metropolol for. I've never had a CT, or MRI of my brain, but have been under a neurologist care for my tremor for years...don't think I've ever mentioned the smell to him though. I'm smelling it right now...sometimes its more intense than others. No headaches, but I do get off balance and have a very low heart rate 42-to48...rarely into the 50's. B/P is usually normal or pre-hypertensive. I also take benicar and synthroid which has been recently checked and was within "normal range."