Lesinurad/Allopurinol 200/300 FDC Tablets Bioavailability

Study Overview
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Brief Summary
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This study will assess relative bioavailability of lesinurad/allopurinol fixed dose combination (FDC), its individual components and the effect of food.

Detailed Description
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The study comprises 2 parts. Part 1 will assess the relative BA of lesinurad/allopurinol FDC and monocomponents in fasted subjects. Part 2 will assess the effect of food on the PK of FDC tablets.

Official Title
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A Phase 1, Randomized, Open-Label, Crossover Study to Assess the Relative Bioavailability of Lesinurad/Allopurinol Fixed Dose Combination Tablets and Coadministered Lesinurad and Allopurinol Tablets and the Effect of Food on the Pharmacokinetics of Lesinurad/Allopurinol Fixed Dose Combination Tablets in Healthy Adult Male Subjects

Conditions
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Healthy

Intervention / Treatment
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* Drug: lesinurad/allopurinol 200/300 FDC tablets
* Drug: lesinurad 200 mg
* Drug: allopurinol 300 mg
* Drug: lesinurad/allopurinol 200/200 FDC tablets
* Drug: allopurinol 200 mg


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Body mass index ranging between 18 kg/m2 and 40 kg/m2. Screening serum urate level is ≤ 7.0 mg/dL. Exclusion Criteria: Asian subject who has a positive test for the HLA-B*5801 allele. History or suspicion of kidney stones. Estimated creatinine clearance, as determined at Screening, of < 90 mL/min calculated by the Cockcroft-Gault formula using ideal body weight. Undergone major surgery within 3 months prior to Screening. Donated blood or experienced significant blood loss (> 450 mL) within 12 weeks prior to Day 1or has given a plasma donation within 4 weeks prior to Day 1. Inadequate venous access or unsuitable veins for repeated venipuncture. Received any strong or moderate enzyme-inducing drug or product within 2 months prior to Screening.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 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

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Sequence AB<br>Day 1: lesinurad/allopurinol FDC tablets (Treatment A); Day 8: lesinurad + allopurinol (Treatment B) | Drug: lesinurad/allopurinol 200/300 FDC tablets<br> <br> Drug: lesinurad 200 mg<br> <br> Drug: allopurinol 300 mg<br> <br> |
| Experimental: Sequence BA<br>Day 1: lesinurad + allopurinol (Treatment B); Day 8: lesinurad/allopurinol FDC tablets (Treatment A). | Drug: lesinurad/allopurinol 200/300 FDC tablets<br> <br> Drug: lesinurad 200 mg<br> <br> Drug: allopurinol 300 mg<br> <br> |
| Experimental: Sequence CD<br>Day 1: lesinurad/allopurinol FDC tablets (Treatment C [fasted]); Day 8: lesinurad/allopurinol FDC tablets (Treatment D [fed]). | Drug: lesinurad/allopurinol 200/300 FDC tablets<br> <br> |
| Experimental: Sequence DC<br>Day 1: lesinurad/allopurinol FDC tablets (Treatment D [fed]); Day 8: lesinurad/allopurinol FDC tablets (Treatment C [fasted]). | Drug: lesinurad/allopurinol 200/300 FDC tablets<br> <br> |
| Experimental: Sequence EF<br>Day 1: lesinurad/allopurinol 200/200 FDC tablets (Treatment E); Day 8: coadministered lesinurad 200 mg + allopurinol 200 mg (100 mg × 2) | Drug: lesinurad 200 mg<br> <br> Drug: lesinurad/allopurinol 200/200 FDC tablets<br> <br> Drug: allopurinol 200 mg<br> <br> |
| Experimental: Sequence FE<br>Day 1: coadministered lesinurad 200 mg + allopurinol 200 mg (100 mg × 2) (Treatment F); Day 8: lesinurad/allopurinol 200/200 FDC tablets (Treatment E). | Drug: lesinurad 200 mg<br> <br> Drug: lesinurad/allopurinol 200/200 FDC tablets<br> <br> Drug: allopurinol 200 mg<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetics (PK) endpoints in terms of maximum observed concentration (Cmax) for lesinurad/allopurinol 200/300 and 200/200 FDC tablets relative to lesinurad and allopurinol monocomponent tablets | Cmax is the maximum observed concentration of a drug after administration | Days 1 and Day 8 | 
| PK endpoints in terms of time of occurrence of maximum observed concentration (tmax) for lesinurad/allopurinol 200/300 and 200/200 FDC tablets relative to lesinurad and allopurinol monocomponent tablets | Tmax is the time of occurrence of cmax | Day 1 and Day 8 | 
| PK endpoints in terms of area under the plasma concentration time curve from zero to the last quantifiable sampling timepoint (AUC last) for lesinurad/allopurinol 200/300 and 200/200 FDC tablets relative to lesinurad and allopurinol monocomponent tablets | AUC last is the area under the plasma concentration time curve from zero to the last quantifiable sampling timepoint | Day 1 and Day 8 | 
| PK endpoints in terms of area under the plasma concentration time curve from and from zero to infinity (AUC 0-∞) for lesinurad/allopurinol 200/300 and 200/200 FDC tablets relative to lesinurad and allopurinol monocomponent tablets | AUC 0-∞ is a meausre of total concentration from time zero to infinity | Day 1 and Day 8 | 
| PK endpoints in terms of apparent terminal half-life (t1/2) for lesinurad/allopurinol 200/300 and 200/200 FDC tablets relative to lesinurad and allopurinol monocomponent tablets | t1/2 is a measure of apparent terminal half-life | Day 1 and Day 8 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of Adverse Events in terms of changes in laboratory parameters |  | 6 weeks | 
| Incidence of Adverse Events in terms of electrocardiogram parameters |  | 6 weeks | 
| Incidence of Adverse Events in terms of vital signs |  | 6 weeks | 
| Incidence of Adverse Events in terms of physical examination findings |  | 6 weeks |