Clinical trial NCT00000288: Role of Metabolites in Nicotine Dependence (2) - 5
Official title: Role of Metabolites in Nicotine Dependence (2)
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
Conditions: Tobacco Use Disorder
Keywords: nicotine dependence
Lead sponsor: National Institute on Drug Abuse (NIDA)
Sponsor class: NIH
Collaborators: name: University of Minnesota
First posted: 1999-09-21
Enrollment: 0
Sex: ALL
Minimum age (years): 21
Maximum age (years): 45
Standard ages: ADULT
Accepts healthy volunteers: no
Intervention model: CROSSOVER
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to determine the effects of varying doses of cotinine on cigarette self-administration.

Detailed description: Previous studies have shown that cotinine, a metabolite of nicotine, antagonizes some of the effects of nicotine. One study showed that nicotine eliminates some of the beneficial effects of the nicotine patch in reducing withdrawal symptoms. The purpose of this study was to examine the effects of cotinine. The results generally showed no effects on self-administration of cigarettes, although higher serum nicotine levels were observed on the highest doses of cotinine compared to placebo or lower doses of cotinine.

Eligibility criteria: Inclusion Criteria:

Male/Female subjects ages 21-45 yrs. inclusive, with a smoking history of at least 1 pack of cigarettes daily for at least 1 year. Subject must be in good health as verified by medical history, screening examination, and screening laboratory tests. Subject must provide written informed consent to participate in the study and be motivated to stop smoking for a short term.

Exclusion Criteria:

History of myocardial infarction, angina pectoris, sustained or episodic cardiac arrhythmias, symptomatic peripheral vascular disease, peptic ulcer disease or any other medical condition which the physician or investigator deems inappropriate for participation. Insulin-dependent diabetes. Pregnant or lactating, or not using adequate birth control methods. Requirement of any form of regular psychotropic medication (antidepressants, antipsychotics, or anxiolytics) and recent psychiatric history). Chronic use of systemic steroids or antihistamines. Skin sensitivity which would preclude use of a transdermal system. Abuse of alcohol or any other recreational or prescription drug. Use of any other tobacco products including smokeless tobacco and nicotine products. Previous use of transdermal nicotine system. Inability to fulfill all scheduled visits and examination procedures throughout the study period.

Primary outcomes:
measure: Subjective effects
measure: Physiological effects
measure: Behavioral
measure: Subjective
Secondary outcomes:
Other outcomes:
Locations:
city: Minneapolis
country: United States
facility: University of Minnesota
state: Minnesota
Study officials:
affiliation: University of Minnesota
name: Dorothy Hatsukami, Ph.D.
role: PRINCIPAL_INVESTIGATOR
References:
citation: Presented at Society for Research on Nicotine and Tobacco Scientific Meeting, 1997 and Psychopharmacology 1998. Presented at Society for Research on Nicotine and Tobacco Scientific Meeting, 1997.