Comparative Pharmacokinetics and Pharmacodynamics of Synthetic Nicotine
University of California, San Francisco
18 participants
Dec 6, 2024
INTERVENTIONAL
Conditions
Summary
In a crossover study, experienced electronic cigarette users will vape 3 different forms of nicotine: natural (derived from tobacco), synthetic, or a 50:50 mixture of both natural and synthetic. The investigators will compare nicotine metabolism, cardiovascular effects, patterns of self-administration, and participants' feelings of craving/withdrawal and enjoyment.
Eligibility
Inclusion Criteria2
- Healthy on the basis of medical history and limited physical examination.
- Current regular user of E-Cigarettes (≥ 15 days in the past 30 days)
Exclusion Criteria12
- • Medications
- Use of medications that are inducers of nicotine metabolizing enzyme CYP2A6 (Example: rifampicin, carbamazepine, phenobarbital, and other anticonvulsant drugs).
- Use of sympatholytic medications for cardiovascular conditions including hypertension (Example: beta and alpha-blockers).
- Concurrent use of nicotine-containing medications (Example: nicotine patch, lozenge, gum).
- Any stimulant medications (example: Adderall) generally given for ADHD treatment.
- • Pregnancy
- Pregnancy (self-reported and urine pregnancy test)
- Breastfeeding (determined by self-report)
- Women of childbearing potential must be using an acceptable method of contraception
- Inability to read and write in English
- A known propylene glycol/vegetable glycerin allergy
- Uncomfortable with getting blood drawn
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Interventions
Participants will spend 8 hours in the hospital research ward and will vape e-liquid containing 100% (S)-nicotine. They will vape following a standardized session, followed by a 4 hour abstinence period. Participants will then vape as they wish (ad libitum) for 90 minutes.
Participants will spend 8 hours in the hospital research ward and will vape e-liquid containing 100% (R)-nicotine. They will vape following a standardized session, followed by a 4 hour abstinence period. Participants will then vape as they wish (ad libitum) for 90 minutes.
Participants will spend 8 hours in the hospital research ward and will vape e-liquid containing 50% (R)-nicotine and 50% (S)-nicotine. They will vape following a standardized session, followed by a 4 hour abstinence period. Participants will then vape as they wish (ad libitum) for 90 minutes.
Locations(1)
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NCT05962229