Nicotine Clinical Trial
Official title:
Impact of Flavors on Nicotine Perception and Self-Administration Via E-cigarettes
The goal of this application is to test whether menthol and fruit flavors impact e-cigarette use through dissociable mechanisms and exert their effects differentially across nicotine doses.
This study examines the impact of menthol and fruit flavors on self-administration of e-cigarette solutions containing varying amounts of nicotine. This is a randomized, double-blind study with a within-subject cross-over design, using e-liquids with 5 different flavors and 4 different levels of nicotine for a total of 20 different e-liquid formulations. Each subject will participate in 4 test sessions. The order of flavor and nicotine delivery will be randomized. At each test session, they will undergo directed self-administration, in a randomized order, then an ad libitum self-administration session where they can choose among all of the e-cigarettes used during the directed session. The primary aims assess the impacts of nicotine and flavor (and their interactions) on participants' subjective ratings of the e-liquids during the 'directed' self-administration component, and self-administered puffs during the ad libitum self-administration component. In addition, the study will explore the impact of sex/gender and sensitivity to nicotine aversiveness or bitterness (as operationalized by genetic variations in the alpha-5 subunit of nicotinic acetylcholine receptor that influences the aversive effects of nicotine, or a taste receptor number 38 ( TAS2R38) important for bitterness perception) on study outcomes. ;
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