9 studies were found.

1.		Completed	Buprenorphine and Naloxone Combination Study - 10 Conditions: Heroin Dependence; Opioid-Related Disorders
2.		Completed	Buprenorphine and Naloxone for the Treatment of Opiate Dependence - 1 Conditions: Heroin Dependence; Substance-Related Disorders
3.		No longer recruiting	Buprenorphine/Naloxone in the Treatment of Heroin Dependence - 14 Conditions: Heroin Dependence; Substance-Related Disorders
4.		No longer recruiting	Methylphenidate in the Treatment of Cocaine Dependent Patients with Adult Attention Deficit Hyperactivity Disorder - 5 Conditions: Cocaine-Related Disorders; Substance-Related Disorders
5.		Completed	Methylphenidate Raclopride Positron Emission Tomography (PET) Test - 11 Conditions: Cocaine-Related Disorders; Substance-Related Disorders
6.		Completed	Modeling Impaired Judgement in Cocaine Abusers - 6 Conditions: Cocaine-Related Disorders; Substance-Related Disorders
7.		No longer recruiting	Nefazodone in the Treatment of Cocaine Dependence and Depression - 4 Conditions: Cocaine-Related Disorders; Substance-Related Disorders
8.		Completed	Pathophysiological Subtyping of Abnormalities in Cocaine Dependence - 9 Conditions: Cocaine-Related Disorders; Substance-Related Disorders
9.		Completed	Prepulse Inhibition of Startle in Cocaine Dependence - 7 Conditions: Cocaine-Related Disorders; Substance-Related Disorders