The use of D-Cycloserine in combination with exposure therapy to treat social anxiety

This study is testing whether a drug called D-Cycloserine can make exposure therapy more effective for people with social anxiety (social phobia). Social phobia is an intense fear of being judged or embarrassed in social situations, and it can make everyday activities like talking to people or speaking in public very difficult. Exposure therapy helps by having you gradually face these feared situations. D-Cycloserine may help the brain let go of fear more quickly. Participants will take D-Cycloserine or a placebo pill before group therapy sessions involving public speaking practice, and their anxiety levels will be measured one month later. You may be eligible if: - You are 18 years of age or older - Your primary (main) diagnosis is social phobia (social anxiety disorder) You may NOT be eligible if: - You have epilepsy - You have severe kidney disease - You have thoughts of suicide - You have a substance dependence problem - You are taking medications that cannot be used with D-Cycloserine - You are pregnant Talk to your doctor about whether this trial might be right for you.