Muscle-type nAChRs

The goal of this clinical trial is to investigate how well nicotine pouches and nicotine mini lozenges serve as substitutes for cigarettes when people try to switch from smoking to using these alternate nicotine products.
Participants will:
* Use nicotine pouches, nicotine mini lozenges, or no study product for a week and then try not to smoke for 3 weeks.
* Have 6 in-person research visits and 1 follow-up call
* Complete questionnaires at each study contact and use a smartphone app to record smoking and study product use

This clinical trial assesses differences in the delivery of THC to the bloodstream depending on whether nicotine vapes are used before or after THC. While there has been much recent publicity about vaping products and concern about their safety considering their increasing use for THC administration, the THC delivery profile associated with THC liquid vaping products in human subjects is currently unknown. Importantly, how the delivery to the bloodstream of THC vaping liquids compare to delivery from smoked cannabis, which is the most used method of cannabis delivery, will serve as an important benchmark for evaluating the delivery and effects of THC vaping products, and their relative safety.

This study will randomize 64 non-treatment seeking individuals who smoke cigarettes daily in a double-blind, placebo-controlled laboratory study testing the effects of cytisinicline on the neural substrates of cigarette cue reactivity.