Clinical Research Directory

Inclusion Criteria: 1. Documentation of HIV-1 status. 2. On ART for at least 24 weeks prior to study entry. Regimen changes within the 24 weeks prior to study entry are acceptable, but candidates must have been on a stable regimen for at least 28 days prior to study entry. 3. On BIC/FTC/TAF, DTG/TDF/FTC or 3TC, or DRV/c-containing ART for at least 28 days prior to study entry (single tablet regimen not required), and with no plans to change ART regimen over the study duration of 48 weeks. 4. Desire to initiate or restart FHT, regardless of orchiectomy status. 5. HIV-1 RNA \<200 copies/mL at screening. 6. HIV-1 RNA \<400 copies/mL available through routine clinical care between 24 and 96 weeks prior to study entry and while on ART. The HIV-1 RNA must be the most recent value obtained between 24 and 96 weeks prior to study entry. 7. The following laboratory values obtained within 60 days prior to study entry * Hemoglobin ≥9.0 g/dL * Platelet count ≥75,000/mm3 * Estimated Glomerular Filtration Rate (eGFR) ≥30 mL/min/1.73m2 if on or switching to TAF, ≥50 mL/min/1.73m2 if on or switching to TDF without cobicistat, or ≥70 mL/min/1.73m2 if on or switching to TDF in combination with cobicistat, calculated using standardized equation for eGFR * Aspartate aminotransferase (AST) (SGOT), alanine aminotransferase (ALT) (SGPT), and alkaline phosphatase are within normal range per local laboratory range * Prolactin \<25 ng/dL 8. Serum estradiol level \<75 pg/mL within 60 days prior to study entry. 9. Willingness to avoid the use of prescribed, non-study provided FHT and non-prescribed FHT during the study period, and no planned use of prescribed or non-prescribed anti-androgens for the first 24 weeks of the study. 10. Ability and willingness of participant to provide informed consent and ability and willingness of participant to undergo study procedures. Exclusion Criteria: 1. Known clotting disorders, active deep vein thrombosis (DVT), pulmonary embolism (PE), or history of these conditions, active arterial thromboembolic disease (e.g., stroke, myocardial infarction), or history of these conditions. 2. Known liver impairment or disease. 3. History of chronic hepatitis B virus (HBV) infection or active HBV infection. 4. History of current active hepatitis C virus (HCV) infection. 5. Prohibited medication use (including drugs with known or expected DDIs with FHT or ART) at time of study entry. 6. Receipt of any estrogen therapy within 14 days prior to study entry for persons on oral FHT, or within 30 days prior to entry for persons on injectable FHT. 7. Known HIV-1 resistance mutations that would preclude remaining on current ART or a switch to a study regimen, in the opinion of the site investigator. 8. Personal history of breast cancer. or known personal history of breast cancer (BRCA) gene. 9. Known or a history of testicular cancer. 10. Known or a history of gall bladder disease. 11. Known or suspected pituitary adenoma. 12. Known allergy/sensitivity or any hypersensitivity to components of study drugs or their formulation. 13. Suicidal ideation in the past 30 days or suicide attempt in the past 90 days, as reported on the Columbia-Suicide Severity Rating Scale (C-SSRS). 14. Serious illness requiring systemic treatment and/or hospitalization within 30 days prior to entry. Stable (in the opinion of the site investigator) treatments for chronic comorbidities are allowed. 15. Presence of any other medical condition that would preclude FHT administration for safety reasons, in the opinion of the site investigator.