A Study in Evaluating Bioequivalence of Test and Reference Vadadustat 450 MG and 150 MG Tablets and to Determine Food Effect on the 450 MG Tablet

This is a randomized, open-label, single-dose, three-period crossover study in healthy adults
to assess the bioequivalence of 3 X 150 mg vadadustat tablets (Test) compared to a single 450
mg vadadustat tablet (reference). Blood samples for vadadustat PK will be collected at
pre-dose (0 hour) and at 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 9, 12, 18, 24, 32, 40, and 48
hours post-dose. The study will also assess the effect of food on vadadustat bioavailability
by evaluating the pharmacokinetics of the 450 mg tablet in fed and fasted subjects.

Inclusion Criteria:

- Male or female subjects between ≥18 years and ≤55 years of age

- Healthy subjects per Investigator judgment as documented by the medical history,
physical examination, vital sign assessments, 12-lead electrocardiogram (ECG),
clinical laboratory assessments, and general observations.

- Have a body weight ≥50 kg and body mass index (BMI) ≥18.5 kg/m2 to 29.5 kg/m2
inclusive

- Understands the procedures, provides ICF and willing to comply with study requirements

- Willing and able to comply with the requirements of the study protocol.

Exclusion Criteria:

- Current or past history of cardiovascular, cerebrovascular, pulmonary,
gastrointestinal, hematologic, renal, hepatic, immunologic, metabolic, urologic,
neurologic, dermatologic, psychiatric, or other major disease.

- History of cancer (except non- melanoma skin cancer) or history of chemotherapy use.

- Any surgical or medical condition or history that may potentially alter the
absorption, metabolism, or excretion of study treatment, such as, but not limited to
gastric bypass surgery or gastric or duodenal ulcers.

- History of severe allergic or anaphylactic reactions. Chronic daily medication use.

- History of drug abuse Excessive alcohol consumption.

- Smoking and the use of nicotine-containing products

- Consumption of grapefruit or grapefruit juice, pomelo, star fruit, Seville or Moro
(blood) orange, or their associated products

- Participation in another clinical trial or exposure to any investigational agent.

- Donation of blood or significant blood loss or plasma donation.

- Any condition that would interfere with the ability to provide informed consent,
comply with study instructions, or which might confound the interpretation of the
study results or put the patient at undue risk.