Nicotine pouches put to the test: can they replace cigarettes?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. ≥ 21 years old 2. good general health based on screening procedures (e.g., physical exam, blood testing) 3. vital signs in normal range (resting heart rate less than 100bpm, systolic blood pressure less than 150mmHg, diastolic blood pressure less than 90mmHg) 4. negative urine test for illicit drug use (excluding THC) and negative breath alcohol test at screening and before each session 5. self-report currently smoking daily 6. self-report at least a one year history of regular smoking 7. exhaled breath CO greater than or equal to 10ppm and urine cotinine greater than 100 ng/ml at screening 8. meet criteria for at least mild tobacco use disorder 9. no self-reported regular use of other tobacco products (e.g., smokeless products, e-cigarettes) in the past 30 days 10. no self-reported prior use of novel oral nicotine pouches 11. exhaled breath CO less than 10 ppm upon arrival for each study session. Exclusion Criteria: 1. Psychoactive drug use (aside from cannabis, nicotine, alcohol, or caffeine) in past month 2. Current use of over-the-counter (OTC) drugs, supplements/vitamins, or prescription medications that, in the opinion of the investigators or medical staff, will impact safety 3. Use of cannabis \>4 times per week 4. History of or current significant medical condition that, in the opinion of the investigators or medical staff, will impact safety 5. Current psychiatric condition or substance use disorder (aside from tobacco use disorder) that, in the opinion of the investigators or medical staff, will impact safety or study outcomes 6. Women who are pregnant, planning to become pregnant, or are breast-feeding 7. Currently seeking treatment to quit smoking or currently using a nicotine/tobacco cessation product. 8. Enrollment in another clinical trial in the past 30 days