My husband started taking the prescription medication Multaq a few weeks ago. Ever since he started taking it, he has complained of a constant smell of smoke, much like what you would smell if someone around you was smoking a cigarette. No one smokes, and he isn't around cigarette smoke at all. Also, he has said that this smell has caused him to take very shallow breaths, and he now has trouble staying asleep. Is the smoke smell normal with this medication, or is there another explanation that may cause concern?