Pharmacology General d12739ae Drug used for cessation of smoking ? A Theophylline B Biclutamide C Salmeterol D Varenicline High-Yield Explanation Ans. is 'd' i.e., Varenicline Varenicilline is a direct acting nicotine agonist with selective action on a4 P2isoform of N. receptors. It is an antismoking drug.