Hyperosmia
"Hyperosmia is an increased ability to smell - for example, being able to identify the perfume of the previous occupant of a chair. It is seen in patients with cluster headaches, migraines, and adrenal cortical insufficiency (Addison's Disease). Psychedelic drugs such as LSD, psilocin, or 2C-B have been anecdotally shown to enhance smell."
Taken from Wikipedia (http://en.wikipedia.org/wiki/Hyperosmia)
