Conditions: Attention-Deficit Hyperactivity Disorder
Keywords: Concerta Adults Attention-Deficit/Hyperactivity Disorder ADHD Methylphenidate hydrochloride
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 284
Healthy volunteers: no

Brief summary:
The main purpose of this study is to evaluate the efficacy of JNS001 titrated to daily doses of 18 to 72 mg in adults with attention-deficit hyperactivity disorder (ADHD) relative to placebo.

Detailed description:
This is a randomized (the study drug is assigned by chance), double-blind (DB, neither physician nor patient knows the name of the assigned drug), multicenter, placebo-controlled, parallel group (each group of patients will be treated at the same time), dose-titration study. This study consists of a screening period, a DB phase (titration period and efficacy assessment period), and post-study phase. The study includes a 1 to 2-week screening period for wash-out of prohibited drugs, and screening for eligibility. Eligible patients will be randomly assigned to receive JNS001 or placebo in a ratio of 1:1. The study also includes a 4-week titration period. Patients will be titrated from a starting dose of 18 mg/day or matching placebo for 7 days (+/- 2 days), and continue with a weekly (+/- 2 days) increment of 18 mg until an individualized dose is achieved. Once an individualized dose is achieved, patients will remain on that dose for the rest of the titration period as far as tolerable. Doses can be tapered down only once during the titration period in the study, and their dose cannot be up-titrated again for the rest of the period. The 4-week titration period will be followed by the 4-week efficacy assessment period. The post-study phase for collection of additional safety data will be scheduled for 1 week after a patient's final study treatment. The study drug will be administered with water once daily in the morning at doses of 18 mg, 36 mg, 54 mg, 72 mg per day or the matching placebo. The study treatment period is 8 weeks (titration period of 4 weeks and efficacy assessment period of 4 weeks).

Arms:
arm 1: None arm 2: None

Interventions: intervention 1: JNS001 intervention 2: Placebo
Intervention descriptions: intervention 1: Participants will receive JNS001 (18 mg, 36 mg, 54 mg or 72 mg per day) orally once daily for 8 weeks. intervention 2: Participants will receive matching placebo orally once daily for 8 weeks.

Protocol document: