THOMAS SPENCER

An Open-Label Study of Naltrexone in Adults With Attention Deficit Hyperactivity Disorder.

Prevention of Stimulant-Induced Euphoria With an Opioid Receptor Antagonist

A Study of Repeat Dosing of OROS® Methylphenidate Hydrochloride (CONCERTA®) and Immediate Release Methylphenidate Hydrochloride in Healthy Adults

A Double-blind Randomized, Placebo-controlled, Crossover Study of Single Doses of OROS Methylphenidate Hydrochloride (CONCERTA) and Long-acting Methylphenidate Hydrochloride (RITALIN LA) in Healthy Adults

An Open Label Phase I/II Study of Dopamine Transporter Receptor Occupancy With OROS and Immediate Release Methylphenidate as Measured With C-11 Altropane in Human Subjects

Naturalistic Substitution of Concerta in Adult Subject With ADHD Receiving Immediate Release Methylphenidate