A Safety and Effectiveness Study of Methylphenidate HCl Extended-release Tablets in Adults With Attention Deficit Hyperactivity Disorder

McNeil-PPC

Status and phase

Completed

Phase 3

Conditions

Attention Deficit Disorder With Hyperactivity

Treatments

Drug: methylphenidate hydrochloride extended-release tablets

Study type

Interventional

Funder types

Industry

Identifiers

NCT00326391

CR011560

Details and patient eligibility

About

The purpose of this study is to evaluate the effectiveness and safety of methylphenidate HCl extended-release tablets at five dose levels compared to placebo in adults with Attention Deficit Hyperactivity Disorder (ADHD)

Full description

This is a randomized (patients are assigned different treatments based on chance), placebo-controlled , double-blind (neither the patient nor the physician knows whether drug or placebo is being taken), parallel-group, dose-titration, multicenter study to determine the effectiveness and safety of five doses of methylphenidate HCl extended-release tablets, 36 mg, 54 mg, 72 mg (two 36 mg tablets), 90 mg (one 36 mg tablet plus one 54 mg tablet), or 108 mg (two 54 mg tablets) administered orally once per day in adults with Attention Deficit Hyperactivity Disorder. Patients will be randomized to receive either placebo or methylphenidate HCl extended-release tablets for seven weeks. Patients assigned to methylphenidate HCl extended-release tablets will start treatment with 36 mg and continue to receive incremental increases of 18 mg of methylphenidate HCl extended-release tablets every seven days (+/-2 days) until an individualized dose is achieved. The individualized dose is achieved when Adult ADHD Investigator Symptom Rating Scale (AISRS) decreases by 30% and a Clinical Global Impression - Improvement (CGI-I) score is 1 or 2, or titration to the maximum dose of 108 mg is achieved. If a limiting adverse event occurs, the dose will be titrated downward by 18 mg. This dose is then the patient's individualized dose. Once an individualized dose has been achieved, patients will remain on that dose for the duration of the titration period and for the two weeks prior to Final Visit/2-Week Efficacy Assessment Visit. Patients assigned to placebo will follow the same dosing schedule and procedures as the patients randomized to methylphenidate HCl tablets. Safety assessments include monitoring adverse events, blood pressure, pulse, weight, and electrocardiograms (ECG) throughout the study. The primary hypothesis is that methylphenidate HCL extended-release tablets at an individualized dose will be superior to placebo with respect to improvement in the primary efficacy endpoint defined by change from baseline in the Adult ADHD Investigator Symptom Rating Scale. Patients will initiate methylphenidate HCl extended-release tablets with 36 mg and continue to receive increases in 18 mg increments for 7 days until an individualized dose or maximum dose of 108 mg is achieved. Patients will remain on this dose for the duration of the titration period and for 2 weeks prior to Final Visit/2 Week Efficacy Assessment; a maximum of 51 days. Patients receiving placebo will follow the same dosing schedule/procedures as patients receiving methylphenidate HCL tablets

Enrollment

229 patients

Sex

All

Ages

18 to 65 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Investigator determined diagnosis of ADHD as defined by the Diagnostic and Statistical Manual of Mental Disorders Fourth Edition (DSM-IV) criteria with symptomatology from childhood to adulthood, symptoms present before age seven years and continue to meet full DSM-IV criteria at time of assessment
Diagnosis confirmed by the Adult ADHD Clinical Diagnostic Scale (ACDS) at Baseline and Adult ADHD Investigator Symptom Rating Scale (AISRS) score of 24 or greater as determined by the Investigator at Baseline
Global Assessment of Functioning (GAF) Scale score of 41 to 60, inclusive, at Baseline
Minimum weight of 100 lbs (45.4 kg) at Screening
Negative urine drug test at the Screening and Baseline Visits when tested for drugs of abuse

Exclusion criteria

Known to be non-responders to methylphenidate or other stimulants for the treatment of ADHD
History of allergy, sensitivity or contraindication to methylphenidate or components of methylphenidate HCL extended-release tablets
Coexisting medical condition or taking concomitant medication that would interfere with safe administration of methylphenidate in the Investigator's opinion
Known structural cardiac abnormality
Diagnosis of or family history of Tourette's syndrome, or motor or verbal tics
history of seizures or a seizure disorder other than febrile seizures in childhood
Glaucoma
Uncontrolled hyperthyroidism or hypothyroidism