A Study of the Potential Effects of Trimethoprim on the Pharmacokinetics of ER OROS Paliperidone

Study Overview
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Brief Summary
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The purpose of this study is to evaluate the effects of an organic cation transporter inhibitor, trimethoprim, on the pharmacokinetics of orally administered ER OROS paliperidone and to assess the safety and tolerability of the treatments in healthy male volunteers.

Detailed Description
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This study was designed as a single center, open-label, randomized, 2 treatment period crossover study in healthy male volunteers. The study consists of a screening period (within 21 days before the first study drug administration) before randomization; an open-label treatment phase consisting of 2 periods during which subjects will receive a single oral dose of ER OROS paliperidone alone (Treatment A) or in combination with 200 mg trimethoprim twice daily (Treatment B); and end-of-study evaluations upon completion of all the study procedures in Period 2 or early withdrawal. The pharmacokinetic blood and urine samples will be collected over a 96 hour period after ER OROS paliperidone administration. Successive ER OROS paliperidone administrations will be separated by at least 14 days. Given that the main elimination route of paliperidone is renal clearance and about half of this is through active secretion in the renal tubule, competition for this route of elimination can occur when other actively secreted drugs are coadministered. Therefore, the possible influence on the renal excretion of paliperidone will be investigated when a competitor for active renal secretion, trimethoprim, is coadministered. Safety and tolerability will be monitored throughout the study. Treatment A: a single oral dose of 6 mg ER OROS paliperidone on Day 1; Treatment B: a 200 mg trimethoprim tablet twice daily from Day 1 to Day 8 and a single oral dose of 6 mg ER OROS paliperidone on Day 5.

Official Title
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Investigation of the Potential Effects of Trimethoprim on the Pharmacokinetics of ER OROS Paliperidone in Healthy Male Subjects

Conditions
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Schizophrenia

Intervention / Treatment
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* Drug: ER OROS paliperidone


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male, aged 18 to 55 years, inclusive Volunteers must have signed 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 Body Mass Index (BMI, weight [kg]/height [m²]) range of 18 to 28 kg/m², inclusive Normotensive with supine (5 minutes) blood pressure between the range of 100 to 140 mmHg systolic, inclusive, and 60 to 90 mmHg diastolic, inclusive Healthy on the basis of a prestudy physical examination, medical history, ECG, and the laboratory results of serum chemistry, hematology and urinalysis performed within 21 days before the first dose. If the results of the serum chemistry, hematology or urinalysis testing are not within the laboratory's reference ranges the subject can be included only if the investigator judges that the deviations are not clinically significant Creatinine clearance value greater than or equal to 80 mL/min Signed an informed consent for genetic testing, indicating whether the volunteer does or does not wish to participate in the genetic part of the study. Exclusion Criteria: Drug allergy to risperidone, paliperidone, trimethoprim, any of its excipients or history of hypersensitivity to heparin, in case a heparin lock will be used Past or current history of folic acid deficiency or megaloblastic anemia Recent history of alcohol or substance abuse or dependence or a positive test result for the urine drug screen at screening Relevant history or presence of any cardiovascular (including myocardial infarct or cardiac arrhythmia), respiratory, neurological (including seizures, cerebrovascular disorders), psychiatric, renal, hepatic, gastrointestinal (including surgeries, severe gastrointestinal narrowing, and malabsorption problems), endocrinal, hematological or immunological disease. History of any cancer, with the exception of basal cell carcinomas At screening, has a decrease of >20 mmHg in systolic blood pressure or a decrease of >10 mmHg in diastolic blood pressure after standing for at least 2 minutes that is not associated with an increase of >15 beats per minute (bpm) in heart rate Bradycardia (heart rate <45 bpm) as determined by screening ECG A positive result for any of the tests for hepatitis B, C, and human immunodeficiency virus (HIV).

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: ER OROS paliperidone|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To evaluate the effects of an organic cation transporter inhibitor, trimethoprim, on the pharmacokinetics of orally administered ER OROS paliperidone |  |  | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To evaluate the safety and tolerability of the treatments in healthy male volunteers |  |  | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Schizophrenia, Mood disorders, Antipsychotic drugs, Renal secretion, ER OROS paliperidone