Anosmia: Causes, Symptoms, and Natural Treatment Options

Nicotine patches or lozenges help with the loss of taste and smell and aid in rapid recovery in 2-3 days smell, taste come back and ringing in the ears goes away.

I don't remember it as a treatment for it though but just for the mentioned symptoms, I could be wrong though.

This I heard watching a documentary on the subject. Watch the dosage though if you're a non-smoker. I tried a 4 mg lozenge a few days ago and thought I was going to die from a heart attack, so my advice is to start as low dose as possible then increase gradually to tolerance.