Which of the following is NOT one of the FDA approved forms of Nicotine Replacement Therapy?

Chantix, known generically as varenicline, is not classified as a form of Nicotine Replacement Therapy (NRT). Instead, it is a prescription medication that serves a different function in smoking cessation. Varenicline works as a partial agonist at nicotine receptors, meaning it activates these receptors but to a lesser degree than nicotine itself. This dual action helps reduce withdrawal symptoms and cravings associated with quitting smoking while simultaneously blocking nicotine from binding to those receptors.

In contrast, the approved forms of Nicotine Replacement Therapy include the nasal spray, lozenge, and gum. Each of these options provides a controlled dose of nicotine to help mitigate withdrawal symptoms and cravings, making it easier for individuals to stop smoking. This is particularly important because NRT addresses the physical dependence that comes with nicotine addiction, which is a crucial aspect of the cessation process.