Multiple Ascending Dose Study in Healthy Subjects to Evaluate the Safety, Tolerability, and Pharmacokinetics of LY03005

This will be a randomized, double-blind, placebo-controlled, multiple ascending dose study to be conducted in the US. Approximately 48 healthy subjects will be enrolled into one of the four groups

Inclusion criteria

• Are capable of giving informed consent and complying with study procedures;
• Are between the ages of 18 and 45 years, inclusive;
• A negative pregnancy test result prior to screening and admission for all female subjects, and meet the following criteria defined as:

• If child-bearing potential, agree to avoid pregnancy during the study and one month after the end of the study by using effective contraceptive method(s), such as an intrauterine device (IUD), diaphragm with spermicide, and condoms with spermicide.
• Surgically sterile for at least 3 months prior to screening
• Postmenopausal
• Considered healthy by the Principal Investigator, based on a detailed medical history, full physical examination, clinical laboratory tests, 12-lead ECG and vital signs;
• Nonsmoker, defined as not having smoked or used any form of tobacco in more than 6 months before screening;
• Body mass index (BMI) of 19 to 30 kg/m2 inclusive and body weight not less than 50 kg;
• Willing and able to adhere to study restrictions and to be confined at the clinical research center.

Exclusion criteria

Subjects will be excluded from study entry if any of the following exclusion criteria are present at screening or admission:

• Clinically significant history of gastrointestinal, cardiovascular, musculoskeletal, endocrine, hematologic, psychiatric, renal, hepatic, bronchopulmonary, neurologic, immunologic, lipid metabolism disorders, or drug hypersensitivity;
• Subjects with a mean systolic blood pressure of three measurements less than 130 mmHG, or a mean diastolic blood pressure of three measurements less than 90 mmHG at screening. Blood pressure will be measured at supine position.
• Known or suspected malignancy;
• Positive blood screen for human immunodeficiency virus (HIV), or hepatitis B surface antigen (HBsAg), or hepatitis C virus;
• A history of seizure. However, a history of febrile seizure is allowed;
• Positive pregnancy test result, or plan to become pregnant if female;
• A hospital admission or major surgery within 30 days prior to screening;
• Participation in any other investigational drug trial within 30 days prior to screening;
• DSM-V substance use disorder within 6 months prior to screening;
• A positive result for alcohol or drugs of abuse at screening or admission;
• Tobacco use within 6 months prior to screening;
• An unwillingness or inability to comply with food and beverage restrictions during study participation;
• Donation or blood collection of more than 1 unit (approximate 450 mL) of blood (or blood products) or acute loss of blood during the 90 days prior to screening;
• Use of prescription or over-the-counter (OTC) medications, and herbal medicines (including St John's Wort, herbal teas, garlic extracts)within 14 days prior to dosing (Note: Use of acetaminophen at < 3g/day is permitted until 24 hours prior to dosing);
• A history of intolerance or hypersensitivity to venlafaxine or desvenlafaxine or any excipients;
• A history of suicide attempt in the past 12 months and/or seen by the investigator as having a significant history of risk of suicide or homicide; 17 An unwillingness of male participants to use appropriate contraceptive measures if engaging in sex intercourse with a female partner of childbearing potential. Appropriate measures include use of a condom and spermicide and, for female partners, use of an intrauterine device (IUD), diaphragm with spermicide, oral contraceptives, injectable progesterone, progesterone sub-dermal implants, or a tubal ligation. Sexual intercourse with pregnant or lactating women is prohibited.