Evaluate the Efficacy and Safety of Arhalofenate for Preventing Flares and Reducing Serum Uric Acid in Gout Patients
Evaluate the Efficacy and Safety of Arhalofenate for Preventing Flares and Reducing Serum Uric Acid in Gout Patients
The purpose of this study is to determine whether arhalofenate is effective in preventing
 flares and reducing serum uric acid in gout patients.
Inclusion Criteria:

 -  Male or female patients between 18 and 75 years of age, inclusive

 -  Known gout diagnosis (per criteria of the American Rheumatism Association for the
 classification of the acute arthritis of primary gout, see Appendix 3)

 -  At least three patient-reported and documented flares during the 12 months prior to
 screening (the first of these flares may have resulted in the gout diagnosis; any
 recent flare must have resolved, with the patient back to usual comfort level at least
 seven days prior to screening)

 -  Have not used any ULT since at least two weeks prior to screening

 -  Have not used colchicine since at least two weeks prior to screening

 -  Usual level of resting pain when NOT experiencing flare is three or less on an
 11-point numerical rating scale (NRS)

 -  Have a sUA ≥ 7.5 mg/dL and ≤ 12 mg/dL at screening

 -  All female patients must be surgically sterile or post-menopausal (at least 45 years
 of age with no history of menses for at least two years); or have a partner who has
 undergone vasectomy or must agree to use two medically accepted methods of
 contraception including a barrier method (see Appendix 4) for the entire duration of
 study participation unless she reports complete sexual abstinence. Female patients
 must not be pregnant or lactating

 -  Estimated creatinine clearance (eCrCl) ≥ 60 ml/min/1.73m2 calculated by
 Cockcroft-Gault method at screening

 -  Liver function tests ≤ 3X ULN for AST, ALT and total bilirubin; ≤ 3X ULN for ALP and
 GGT; and ≤ 3X ULN for CK at screening

 -  All other clinical laboratory parameters must be within normal limits or considered
 not clinically significant

 -  Electrocardiogram (ECG) must be normal, or if abnormal, considered not clinically
 significant at screening

 -  Systolic blood pressure ≤ 160 mm Hg and diastolic blood pressure ≤ 90 mm Hg at
 screening; known hypertensive patients stable (blood pressure [BP] reading as above)
 with medication may be included

 -  Patients using agents known to influence sUA levels (see Appendix 7) must be on a
 stable dose and regimen for at least two weeks prior to screening and must be willing
 to continue the same doses and regimens during study participation

 -  Expected to be able to tolerate a short course of either oral NSAIDs and/or oral
 steroids as may be needed to treat a flare

 -  Must be able to swallow tablets/capsules

 -  Following training, must be willing and able to understand and complete an electronic
 diary

 Exclusion Criteria:

 -  Receiving treatment with allopurinol, colchicine, probenecid, benzbromarone, or
 febuxostat within two weeks or pegloticase within six months prior to screening

 -  Known or suspected secondary hyperuricemia (e.g. due to myeloproliferative disorder or
 organ transplant)

 -  Diagnosis of xanthinuria

 -  Fractional excretion of urate > 10% at screening

 -  History of documented or suspected kidney stones

 -  Known infection with the human immunodeficiency virus (HIV) or history of viral
 hepatitis type B or C

 -  A diagnosis of illicit drug or alcohol dependence or abuse within one year of
 screening

 -  History of upper gastrointestinal (GI) bleeding, documented peptic ulcer disease
 (unless known H. pylori infection treated successfully without recurrence), within
 three years of screening

 -  History of stroke, transient ischemic attack (TIA), acute myocardial infarction (MI),
 congestive heart failure (NYHA Class II-IV), angina pectoris, coronary intervention
 procedure (including but not limited to angioplasty, stent placement, coronary
 revascularization), lower extremity bypass procedure, systemic or intracoronary
 fibrinolytic therapy within five years of screening

 -  History of cancer within five years of screening, with the following exceptions:
 adequately treated non-melanomatous skin cancers, non-metastatic prostate cancer or in
 situ cervical cancer

 -  Patients with a history of bladder cancer, active bladder cancer or hematuria

 -  Body mass index (BMI) > 42 kg/m2 at screening

 -  Current or expected requirement for anticoagulant therapy (except for aspirin ≤ 325
 mg/day, clopidogrel [Plavix] ≤ 75 mg/day, or prasugrel [Effient] ≤ 10 mg/day)

 -  Use of any of the following within eight weeks prior to screening: potent CYP3A4
 inhibitors, cytotoxic agents (including azathioprine, mercaptopurine, cyclosporine,
 cyclophosphamide, etc.), ranolazine, digoxin, theophylline, sulphonylureas,
 thiazolidinediones (e.g., rosiglitazone or pioglitazone), atypical antipsychotic
 agents, ampicillin, amoxicillin, loop diuretics or phenytoin

 -  Chronic treatment with NSAIDs (except for as needed [prn] use to treat acute events);
 per protocol a short course of oral NSAIDs may be used to treat flares during the
 study

 -  Current or expected chronic treatment with systemic corticosteroids (topical,
 ophthalmic, intra-articular or inhaled corticosteroid at a dose < 1600 μg/day is
 permitted); per protocol a short course of oral corticosteroid may be used to treat
 flares occurring during the study

 -  History of intra-articular steroid injection to treat flare within four weeks of
 screening

 -  Known hypersensitivity or intolerance to allopurinol or colchicine

 -  Treatment with any other investigational therapy within 30 days or within five half
 lives, whichever is longer, prior to screening

 -  Patients who received arhalofenate in a previous trial

 -  Any other condition(s) that would compromise the safety of the patient, prevent
 compliance with the study protocol including ability to use an electronic diary, or
 compromise the quality of the clinical study, as judged by the Investigator and/or
 Medical Monitor