Pharmacodynamic Study of 300mg Pregabalin vs Placebo in Healthy Male Adults

Inclusion Criteria: 1. Male participants aged 18 to 55 years, inclusive, at the time of signing the informed consent. 2. Overtly healthy with no clinically relevant abnormalities based on the medical history, physical examinations, clinical laboratory evaluations, and 12-lead ECG that, in the opinion of the investigator, would affect participant safety. 3. Body mass index (BMI) within the range of 18-32 kg/m2 (inclusive). 4. Male participants are eligible to participate if they agree to refrain from donating semen. Plus, agree to use a male condom when having sexual intercourse with woman of childbearing potential or women who are currently pregnant. 5. Capable of giving signed informed consent. Exclusion Criteria: 1. Inability to take oral medications or gastrointestinal abnormalities potentially impacting absorption. 2. Clinically significant cardiovascular, hematological, renal, hepatic, pulmonary, endocrine, gastrointestinal, immunological, dermatological, neurological, or psychiatric disease which could interfere with, or the treatment for which might interfere with, the conduct of the study or which would, in the opinion of the investigator, unacceptably increase the participant's risk by participating in the study. 3. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST), \>1.5 x upper limit of normal (ULN) at Screening. 4. Total bilirubin \> 1.5 x ULN (for participants with known Gilbert's syndrome these criteria only apply if total bilirubin \> 1.5 x ULN as long as direct bilirubin is ≤ 1.5 x ULN) at Screening. 5. Estimated glomerular filtration rate (eGFR) \<80 mL/min based on serum creatinine levels using the 2021 chronic kidney disease epidemiology (CKD-EPI) creatinine equation at Screening. 6. Creatinine phosphokinase is ≤ 2 × ULN at Screening. 7. Any of the protocol defined abnormalities on 12-lead ECG or blood pressure (BP) at Screening, confirmed by repeat. 8. Use of prescription drugs ≤ 14 days (or 5 half-lives of the drug, whichever is longer) prior to Day 1, use of over-the-counter drugs, herbal medications, or vitamin supplements ≤ 7 days (or 5 half-lives of the drug, whichever is longer) prior to Day 1 or use of antibiotics and systemic steroids ≤ 28 days prior Day 1. The Sponsor may allow exceptions only if the medication's administration is deemed unlikely to confound safety. 9. Any vaccination ≤ 14 days prior to Day 1 or anticipated vaccination while participating in the study. 10. Receipt of an investigational product or device, or participation in a drug research study ≤ 28 days (or 5 half-lives of the drug, whichever is longer) prior to Day 1. 11. Receipt of an investigational biologic / monoclonal antibody within 180 days (or 5 half-lives, whichever is longer) prior to Day 1. 12. Presence of hepatitis B surface antigen (HBsAg) or hepatitis B core antibody (HBcAb) at Screening. 13. Presence of positive hepatitis C antibody test result at Screening. 14. Positive for Coronavirus Disease 2019 (COVID-19) suggesting active infection at Screening or on Day 1. 15. Positive human immunodeficiency virus (HIV) at Screening. 16. Presence of any condition for which pregabalin administration is contraindicated. 17. Smoking, vaping or use of tobacco or any products containing nicotine ≤ 14 days prior to Day 1. 18. Consumption of alcohol within 48 hours prior to Day 1 and/or food and beverages containing methylxanthines (caffeinated coffee, caffeinated tea, caffeinated soda, and chocolate) within 48 hours of Day 1, and grapefruit, grapefruit juice, Seville oranges, or Seville orange juice ≤ 14 days prior to Day 1. 19. Positive urine drug screen, urine cotinine test, or alcohol breath test at Screening or on Day 1. 20. Donation of over 500 mL blood ≤ 3 months prior to Day 1. 21. Has known psychiatric disorders that would interfere with the cooperation with the requirements of the study. 22. Participant is under legal custodianship. 23. Pain conditions that may require analgesic treatment during the study period/history of opioid medication use. 24. Hand/arm/skin conditions impacting ability to participate in cold pressor assessment. 25. Recent serious injury, surgical procedure, or medical condition which, in the opinion of the investigator, unacceptably increases the participant's risk by being included in the study. 26. Meets protocol defined Pain Tolerance Threshold (PTT) in any of the 5 predose cold pressor tests.