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.