User thesh900 uploaded this Nicotine Gum - Varenicline Nicotinic Acetylcholine Receptor Nicotinic Agonist Pharmaceutical Drug Receptor Antagonist PNG PNG image on April 16, 2018, 6:28 am. The resolution of this file is 1920x844px and its file size is: 47.91 KB. This PNG image is filed under the tags: