Clinical trial NCT01842334: D-cycloserine (DCS) Pretreatment + CBT + Nicotine Replacement Therapy for Smoking Cessation (DCS)
Official title: D-cycloserine (DCS) Pretreatment + Cognitive Behavioral Therapy and Nicotine Replacement Therapy for Smoking Cessation
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE1
PHASE2
Conditions: Nicotine Dependence
Smoking Cessation
Keywords: Nicotine Dependence
Smoking Cessation
D-cycloserine
Lead sponsor: Mclean Hospital
Sponsor class: OTHER
Collaborators: name: American Lung Association
First posted: 2013-04-29
Enrollment: 22
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: 1. Compare the relative efficacy of ten weeks of once weekly 250 mg D-cycloserine (DCS) vs. placebo (both in conjunction with cognitive behavioral therapy (CBT) and nicotine replacement therapy (NRT) on reducing cigarette smoking in treatment-seeking nicotine-dependent outpatients.
2. Compare the relative efficacy of ten weeks of once weekly 250 mg DCS vs. placebo on the process of extinction and the memory encoding process.

Detailed description: The investigators will conduct a Stage 1 pilot feasibility study at McLean Hospital to develop a medication to treat nicotine dependence. In a randomized, double-blind, placebo-controlled trial, 40 nicotine-dependent participants ages 18-65 will receive cognitive behavioral therapy (CBT) and nicotine replacement therapy (NRT) over a 10- week period, with half receiving D-cycloserine (DCS) pretreatment and half receiving placebo. Participants will receive either 250 mg DCS or placebo prior to weekly CBT sessions in addition to NRT over a 10-week treatment period. The investigators also aim to determine the effects of DCS on performance on neuropsychological tests. A 10-week treatment period will be followed by follow-up assessments including neuropsychological tests at 1 and 3 months post-treatment. Primary outcomes will include smoking as measured by carbon monoxide levels and self-report measurements.

Eligibility criteria: Inclusion Criteria:

1) Age range 18-65 years; 2) DSM-IV diagnosis of nicotine dependence, based on the Structured Clinical Interview for DSM-IV (SCID) (First et al. 1996); 3) express a desire to quit cigarette smoking within the next 30 days; 4) smokes greater than or equal to 10 cigarettes per day and less than or equal to 20 cigarettes per day; 5) an expired carbon monoxide (CO) determination greater than or equal to 10 ppm over ambient values; 6) for women of childbearing age, a negative pregnancy test at screening with agreement to use adequate contraception to prevent pregnancy and multiple subsequent pregnancy tests; 7) consent for us to communicate with their prescribing clinician; 8) furnish the names of 2 locators, who would assist study staff in locating them during the study period; 9) live close enough to McLean Hospital to attend study visits; 10) plan to remain in the Boston area for the next 4 months; and 11) are willing and able to sign informed consent.

Exclusion Criteria:

1) Current diagnosis of other drug or alcohol dependence (other than nicotine); 2) significant cardiac disease; 3) current serious psychiatric illness or history of psychosis, schizophrenia, bipolar type I disorder (taking psychiatric medications, aside from wellbutrin, is not an exclusionary criterion); 4) have a current medical condition (including significant laboratory abnormalities, such as liver function tests \>5 times the upper limit of normal range) that could prevent regular study attendance; 5) have mental retardation or organic mental disorder; 6) exhibit acutely dangerous or suicidal behavior; 7) are pregnant, nursing, or, if a woman of childbearing potential, not using a form of birth control judged by the Principal Investigator to be effective; 8) current NRT or other smoking cessation treatment;9) current CBT for smoking cessation; 10) current smokeless tobacco use; 11) inability to read or write in English;12) has epilepsy.

Primary outcomes:
measure: Change From Baseline in Cigarette Smoking in Treatment Seeking Nicotine Dependent Outpatients
timeFrame: During Week 10
Secondary outcomes:
Other outcomes:
Locations:
city: Belmont
country: United States
facility: McLean Hospital
state: Massachusetts
Study officials:
affiliation: Mclean Hospital
name: Kevin P. Hill, MD, MHS
role: PRINCIPAL_INVESTIGATOR
References: