Varenicline is used in: (A) Pulmonary hemosiderosis, (B) Sleep apnea, (C) Anti-trypsin deficiency, (D) Nicotine dependency
Answer is D. Varenicline is a prescription medication used to treat smoking addiction. This medication is the first approved nicotinic receptor paial agonist. Specifically, varenicline is a paial agonist of the alpha4/beta2 subtype of the nicotinic acetylcholine receptor Ref Davidson 23rd edition pg 578