COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

The Efficacy and Safety of PRC-063 in Adult ADHD Patients

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02139124
Recruitment Status : Completed
First Posted : May 15, 2014
Results First Posted : May 7, 2019
Last Update Posted : May 7, 2019
Purdue Pharma, Canada
Information provided by (Responsible Party):
Rhodes Pharmaceuticals, L.P.

Brief Summary:
The purpose of this randomized, placebo-controlled, double-blind, parallel group study is to evaluate the clinical efficacy and safety of PRC-063 in adults with ADHD

Condition or disease Intervention/treatment Phase
ADHD Drug: Placebo Drug: PRC-063 25 mg Drug: PRC-063 45 mg Drug: PRC-063 70 mg Drug: PRC-063 100 mg Phase 3

Detailed Description:

This study is a randomized, phase III, multicenter, placebo-controlled, parallel-group, forced-dose titration in which adult subjects (18 years of age or older) with ADHD will be randomized to PRC-063 (25, 45, 70 or 100 mg) or placebo for four weeks of double-blind evaluation of safety and efficacy. The study will have four phases: (1) screening and 1-week washout; (2)baseline and double-blind, forced-dose titration over a 2-week period; (3) double-blind evaluation over a 2-week period; and (4) a 14-day safety follow-up. Subjects will be required to visit the site 6 times over a 5 week period.

Screening and Washout: Subjects will be screened to establish eligibility for study participation. Subjects who meet eligibility requirements will undergo ADHD medication washout, if applicable.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 375 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase III, Randomized, Double-Blind, Placebo-Controlled, Parallel-Arm, Multi-Center Study Measuring the Efficacy and Safety of PRC-063 in Adult ADHD Patients
Study Start Date : April 2014
Actual Primary Completion Date : October 2014
Actual Study Completion Date : January 2015

Arm Intervention/treatment
Placebo Comparator: Placebo
Placebo Arm
Drug: Placebo
Oral placebo capsule
Other Name: Placebo capsule

Experimental: PRC-063 25 mg
PRC-063 25 mg
Drug: PRC-063 25 mg
Oral 25 mg capsule - active
Other Name: 25 mg capsule

Active Comparator: PRC-063 45 mg
PRC-063 45 mg
Drug: PRC-063 45 mg
Oral 45 mg capsule - active
Other Name: 45 mg capsule

Active Comparator: PRC-063 70 mg
PRC-063 70 mg
Drug: PRC-063 70 mg
Oral 70 mg capsule - active
Other Name: 70 mg capsule

Active Comparator: PRC-063 100 mg
PRC-063 100 mg
Drug: PRC-063 100 mg
Oral 100 mg capsule - active
Other Name: 100 mg capsule

Primary Outcome Measures :
  1. Change From Baseline in Clinician-administered ADHD-5-Rating Scale Total Score [ Time Frame: 4 weeks ]
    Participants were monitored for 4 weeks on treatment (final 2 weeks on stable dose). Clinicians rated subject behavior on the ADHD-5-Rating Scale each week. Primary outcome was based on the final week of treatment. The ADHD-5-RS is an 18-item questionnaire that measures the frequency of ADHD symptoms based on DSM-5 criteria. For each item, clinicians rate how often the behavior is displayed on a scale of 0 (Never or Rarely) to 3 (Very Often). Scores can range from 0 to 54, with lower scores indicating a lower frequency of ADHD symptoms.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male or non-pregnant, non-nursing female at least 18 years of age and meeting the local, legal definition of adult.
  • ADHD diagnosis, inattentive, hyperactive/impulsive or combined, as defined by the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) based on clinician assessment using multiple informants and a structured interview.
  • Unsatisfied with his or her current pharmacological therapy for treatment of ADHD or not currently receiving pharmacological therapy for ADHD. Inclusion of subjects naïve to pharmacological therapy for ADHD is permitted.
  • Female subjects must be one of the following: a. surgically sterile prior to screening; b.

postmenopausal; c. if of childbearing potential, abstinent or willing to use a reliable method of contraception, such as oral contraceptive, two barrier methods, a barrier method plus a spermicidal agent.

  • Female subjects of Child-Bearing Potential (FOCP) must have a negative serum β-hCG pregnancy test at screening.
  • Minimum level of intellectual functioning, as determined by an Intelligence Quotient (IQ) score of 80 or above based on the WASI.
  • Mentally and physically competent to sign an informed consent document indicating that they understand the purpose of and procedures required for the study and are willing to participate in the study.
  • Able and willing to comply with the study procedures for the entire length of the study, including a successful swallow test of an empty 100 mg capsule.

Exclusion Criteria:

  • Having an allergy to methylphenidate or amphetamines or a history of serious adverse reactions to methylphenidate.
  • Known to be non-responsive to methylphenidate treatment. Non-response is defined as methylphenidate use at various doses for a phase of at least four weeks at each dose with little or no clinical benefit.
  • Being diagnosed with or having a history of strokes, epilepsy, migraine headaches (greater than 1 instance every two months), glaucoma, thyrotoxicosis, tachyarrhythmias or severe angina pectoris or serious or unstable medical illness. Subjects with controlled or stable asthma or diabetes will be permitted.
  • Elevated blood pressure, defined as any values above 89 diastolic or 139 systolic, as assessed at Visit 1.
  • Clinically significant ECG abnormalities, as assessed at Visit 1.
  • Clinically significant laboratory abnormalities, as assessed at Visit 1.
  • Currently receiving guanethidine, pressor agents, MAO inhibitors, coumarin anticoagulants, anticonvulsants (e.g. phenobarbital, phenytoin, primidone), phenylbutazone, tricyclic antidepressants (e.g. imipramine, desipramine), selective serotonin reuptake inhibitors (SSRIs) or herbal remedies (unless on a stable dose for 4 weeks).
  • Subject has known history of symptomatic cardiovascular disease, advanced arteriosclerosis, structural cardiac abnormality, cardiomyopathy, serious heart rhythm abnormalities, coronary heart disease, transient ischemic attack or stroke or other serious cardiac problems that may place the subject at increased vulnerability to the sympathomimetic effects of a stimulant drug.
  • Subject has a known family history of sudden cardiac death or ventricular arrhythmia.
  • Subjects who are currently considered a suicide risk by the investigator.
  • Having a primary diagnosis of schizophrenia, schizoaffective disorder, primary affective disorder, schizotypal personality, major depression, bipolar disorder, generalized anxiety, borderline personality disorder, antisocial personality or another unstable psychiatric condition requiring treatment, as assessed by the structured interview conducted at Visit 1.
  • Having a history or suspected physiological dependence (excluding nicotine) on narcotic analgesics or other psychoactive drugs (including barbiturates, opiates, cocaine, cannabinoids, amphetamines and benzodiazepines).
  • Excessive consumption of alcohol (consumes alcohol in quantities greater than 15 drinks per week; 1 drink is defined as 360 mL/12 oz. of beer, 120 mL/4 oz. of wine, or 30 mL/1 oz. of hard liquor), or history (within previous 6 months) of alcohol abuse.
  • Currently (or within 30 days before the planned start of treatment) receiving an investigational drug or using an experimental medical device.
  • Homeless.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02139124

Show Show 38 study locations
Sponsors and Collaborators
Rhodes Pharmaceuticals, L.P.
Purdue Pharma, Canada
Layout table for investigator information
Study Director: Joseph Reiz Purdue Pharma LP
Layout table for additonal information
Responsible Party: Rhodes Pharmaceuticals, L.P. Identifier: NCT02139124    
Other Study ID Numbers: 063-010
First Posted: May 15, 2014    Key Record Dates
Results First Posted: May 7, 2019
Last Update Posted: May 7, 2019
Last Verified: April 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No