Inclusion Criteria:  Male or female, non-smoker (no use of tobacco or nicotine products within 1 month prior to screening), ≥18 and ≤55 years of age, with BMI >18.0 and <32.0 kg/m2.  Male subjects who are not vasectomized for at least 6 months, and who are sexually active with a female partner of childbearing potential (childbearing potential females are defined as women that are neither post-menopausal nor surgically sterile) must be willing to use one of the following acceptable contraceptive methods from (the first) study drug administration and for 90 days after (the last) study drug administration:  simultaneous use of a male condom and, for the female partner, oral contraceptives containing combined estrogen and progesterone beginning a least 4 weeks prior to screening, a vaginal ring, injectable and implantable hormonal contraceptives, intrauterine hormone-releasing system (e.g. Mirena), and progestogen-only hormonal contraception associated with inhibition of ovulation, placed at least 4 weeks prior to the first study drug administration. simultaneous use of a male condom and, for the female partner, nonhormonal intrauterine device (IUD) placed at least 4 weeks prior to the first study drug.  Exclusion Criteria:  Any laboratory test results deemed clinically significant by the Investigator or positive test for HIV, HBsAg, or HCV. Clinically significant ECG abnormalities or vital sign abnormalities (systolic BP lower than 90 or over 140 mmHg (except for hypertensive patients), diastolic BP lower than 40 or over 90 mmHg, HR less than 40 or over 100 bpm, or RR less than 10 or over 22 bpm) at screening. Orthostatic hypotension at Screening or Day -1 (Systolic BP falls > 20 mm Hg or Diastolic BP falls > 10 mm Hg on standing) History of significant alcohol abuse within 1 year prior to screening or regular use of alcohol within 6 months prior to the screening visit (more than 14 units of alcohol per week [1 unit = 375 mL of beer 3.5%, 100 mL of wine 13.5%, or 30 mL of distilled alcohol 40%]). Donation of plasma within 7 days prior to dosing. Donation or loss of blood (excluding volume drawn at screening) of 50 mL to 499 mL of blood within 30 days, or more than 499 mL within 56 days prior to the first dosing.