Lesinurad Tablet Relative Bioavailability

A change in manufacturing site of lesinurad tablets has been implemented. This study is
intended to evaluate the clinical comparability of lesinurad tablets manufactured at the two
different sites by assessing relevant clinical Pharmacokinetics (PK) parameters.

Inclusion Criteria:

- Subject has a body weight ≥ 50 kg (110 lbs) and a body mass index (BMI) ≥ 18 and ≤ 40
kg/m2.

- Subject has a Screening sUA value ≤ 7.0 mg/dL.

- Subject is free of any clinically significant disease that requires a physician's
care and/or would interfere with study evaluations or procedures.

- Subject has no clinically relevant abnormalities in vital signs, ECG, physical
examination or safety laboratory values per the Investigator's judgment.

Exclusion Criteria:

- Subject has a history or clinical manifestations of significant metabolic,
hematological, pulmonary, cardiovascular, gastrointestinal, neurologic, hepatic,
renal, urological, or psychiatric disorders.

- Subject has a history or suspicion of kidney stones.

- Subject has a history of asthma.

- Subject has undergone major surgery within 3 months prior to Day 1.

- Subject has donated blood or experienced significant blood loss (> 450 mL) within 12
weeks prior to Day 1 or gave a plasma donation within 4 weeks prior to the Screening
visit.

- Subject has inadequate venous access or unsuitable veins for repeated venipuncture.