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
This is a double-blind, placebo-controlled study, three-period crossover study to examine the likeability of a single dose of OROS MPH (CONCERTAÒ 90mg) and a single dose of Long-acting MPH (RITALIN LAÒ 90mg). Hypotheses are as follows:
Hypothesis 1: OROS-MPH (CONCERTAÒ) will be later than SODOS-MPH (RITALIN LAÒ) in its Tmax (time to Cmax).
Hypothesis 2: The subjective feelings of detection and likeability would be greater for SODOS-MPH (RITALIN LAÒ) than for an equivalent total dose of OROS-MPH (CONCERTAÒ).
Drug: OROS methylphenidate HCl
Drug: SODAS methylphenidate HCl
|Study Design:||Allocation: Randomized
Endpoint Classification: Pharmacokinetics/Dynamics Study
Intervention Model: Crossover Assignment
|Official Title:||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|
- Objective measures provided by hourly d and l ritalinic acid and methylphenidate levels from pre-dose and hours 1,2,3,4,5,6,7,8,10, and 12.
|Study Start Date:||December 2004|
|Study Completion Date:||September 2005|
|Primary Completion Date:||September 2005 (Final data collection date for primary outcome measure)|
Our recent work has suggested that the potential euphoriant risk associated with MPH may be moderated by the oral delivery system in which a longer delivery system may be safer than the immediate release one. OROS-MPH's pharmacokinetic profile uses an increasing delivery of MPH over the day (ascending pharmacokinetic curve). It was designed to replace IR-MPH TID treatment. Another new long-acting MPH formulation is the spheroidal oral drug absorption system (SODAS). SODAS-MPH consists of capsules with two types of beads in a 1 to 1 ratio. Evaluating whether different long acting formulations of MPH will differ in their rate of onset of MPH action (plasma level) is of high clinical, scientific and public health relevance. Since the rate of delivery of MPH is a key factor previously associated with detection and likeability of MPH.
|United States, Massachusetts|
|Massachusetts General Hospital|
|Cambridge, Massachusetts, United States, 02138|
|Principal Investigator:||Thomas Spencer, MD||Massachusetts General Hospital|