| Not Yet Recruiting | Clinical Trial to Observe the Effects of Tamoxifen on Testosterone Recovery in Medically Castrated Prostate Ca NCT07535905 | University Health Network, Toronto | Phase 2 |
| Completed | A Study to Assess the Bioequivalence of Follitropin Alfa Solution in Pen and Follitropin Alfa Powder in Vial i NCT07097259 | EMD Serono Research & Development Institute, Inc. | Phase 1 |
| Recruiting | Adaptions and Resiliency to Multi-Stressor OpeRations NCT06455969 | Bradley Nindl | Phase 4 |
| Recruiting | Observation of Environment and Reproductive-Endocrine Effects NCT06280807 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Active Not Recruiting | A Phase 4 Study to Evaluate Adrenal Function in Hypogonadal Men Treated With JATENZO® for 12 Months NCT06385509 | Tolmar Inc. | Phase 4 |
| Recruiting | Impact of Peri-operative tEstosterone Levels on oNcological and Functional Outcomes in RadiCal prostatEctomy NCT04833426 | Canisius-Wilhelmina Hospital | Phase 3 |
| Suspended | 7 Tesla MRI Neuroimaging in Testicular Cancer Patients With Hypogonadism and on Androgen Replacement Therapy NCT06191575 | University of Southern California | — |
| Terminated | A Randomized, Double-blinded, Clinical, Placebo-controlled Trial on the Effects of Therapy With Letrozole and NCT05205837 | Rigshospitalet, Denmark | Phase 4 |
| Unknown | A Study to Monitor Ambulatory Blood Pressure Monitoring in Hypogonadal Men Treated With Nasal Testosterone Gel NCT04976595 | Acerus Pharmaceuticals Corporation | Phase 4 |
| Completed | Gonadal Dysfunction in Male Long-term Survivors of Malignant Lymphoma; Vitality NCT04492553 | Lars Møller Pedersen | Phase 2 |
| Recruiting | The Effect of Sex Steroid Replacement Therapy in the Hypogonadism and Transgender Active-Duty Population NCT06247267 | Walter Reed National Military Medical Center | — |
| Recruiting | Locomotor Training With Testosterone to Promote Bone and Muscle Health After Spinal Cord Injury NCT04460872 | North Florida Foundation for Research and Education | Phase 2 |
| Active Not Recruiting | Perioperative Testosterone Replacement Therapy for the Improvement of Post-Operative Outcomes in Patients With NCT04731376 | Emory University | Phase 1 |
| Completed | Gonadal Dysfunction in Male Long-term Survivors of Malignant Lymphoma; Vitality-Obs NCT04630275 | Lars Møller Pedersen | — |
| Completed | A Clinical Trial to Evaluate the Pharmacokinetic Profiles and Safety of CKD-845 NCT04673682 | Chong Kun Dang Pharmaceutical | Phase 1 |
| Completed | A Study of the Effect of Testosterone Replacement Therapy on Blood Pressure in Adult Male Participants With Hy NCT04456296 | Endo Pharmaceuticals | Phase 4 |
| Completed | A Study to Evaluate Androderm®'s Effect on Blood Pressure in Adult Hypogonodal Male Participants NCT04320745 | Allergan | Phase 4 |
| Completed | A Study of the Effect of Topical Testosterone Replacement Therapy on Blood Pressure in Adult Male Participants NCT04274894 | AbbVie | Phase 4 |
| Completed | Testopel ® vs. Generic Testosterone Pellets. NCT04523480 | University of Miami | Phase 3 |
| Active Not Recruiting | Testosterone Therapy and Bone Quality in Men With Diabetes and Hypogonadism NCT03887936 | VA Office of Research and Development | Phase 4 |
| Completed | A Bioequivalence Study of Testosterone Cypionate in Hypogonadal Males NCT03792477 | Pfizer | Phase 1 |
| Unknown | Efficacy and Safety of Testosterone Nasal Gel for Treating Hypogonadism in Men. NCT03281187 | FBM Industria Brasileira Ltda | Phase 3 |
| Completed | Hypothalamic-pituitary Dysfunction in Diabetes NCT05752591 | Istituto Auxologico Italiano | — |
| Completed | A Study to Evaluate the Effect of Testosterone Replacement Therapy (TRT) on the Incidence of Major Adverse Car NCT03518034 | AbbVie | Phase 4 |
| Completed | Association Between the Prevalence of Cardiovascular Risk Factors and New Use of Testosterone NCT03484260 | Bayer | — |
| Terminated | Evaluation of Testosterone Nasal Gel in Hypogonadal Boys NCT03345797 | Acerus Biopharma Inc. | Phase 1 |
| Completed | Extragonadal Effects of hCG on Calcium Homeostasis NCT03418896 | Martin Blomberg Jensen | Phase 1 |
| Completed | Efficacy of Androgen Substitution for Hypogonadism in Men With Type 2 Diabetes Mellitus NCT03437109 | Besins Healthcare | — |
| Completed | Administration of Kisspeptin in Patients With Hyperprolactinemia NCT02956447 | Massachusetts General Hospital | Phase 2 |
| Terminated | A Phase 1/2a Study to Determine the Dose Response Pharmacokinetics of TSX-011 (Testosterone Undecanoate) in Hy NCT03335254 | TesoRx Pharma, LLC | Phase 1 / Phase 2 |
| Completed | Long-term Lifestyle Change and Testosterone Replacement NCT03256292 | Baylor College of Medicine | — |
| Terminated | Testosterone Plus Finasteride Treatment After Spinal Cord Injury NCT02248701 | VA Office of Research and Development | Phase 2 |
| Completed | The Effect of Various Amounts of Fat on PK of Oral Testosterone Undecanoate NCT02921386 | Clarus Therapeutics, Inc. | Phase 2 |
| Completed | Open-Label Study, Evaluating Patient Satisfaction and Symptom Improvement When Treating Male Hypogonadism With NCT02937740 | Acerus Pharmaceuticals Corporation | Phase 4 |
| Completed | Effects of Testosterone on Myocardial Repolarization NCT03126656 | University of Roma La Sapienza | Phase 4 |
| Withdrawn | Effect of Testosterone Replacement on Exercise Capacity in Hypogonadal Men After a Recent Myocardial Infarctio NCT02803073 | Texas Tech University Health Sciences Center | Phase 2 / Phase 3 |
| Terminated | Testosterone Replacement in Renal Failure NCT02712944 | Texas Tech University Health Sciences Center | Phase 1 |
| Completed | Cardiovascular Outcomes of Low Testosterone NCT02758431 | University of Colorado, Denver | N/A |
| Completed | Aromatase Inhibitors and Weight Loss in Severely Obese Hypogonadal Male Veterans (Pilot) NCT02959853 | Baylor College of Medicine | Phase 4 |
| Completed | Safety of Subcutaneous Testosterone Enanthate in Adult Male Hypogonadism NCT02777242 | Antares Pharma Inc. | Phase 2 |
| Unknown | Association Between Testosterone Levels and COPD Severity NCT02824809 | Hospital Italiano de Buenos Aires | — |
| Completed | A Study of Oral Testosterone Undecanoate (TU) in Hypogonadal Men NCT02722278 | Clarus Therapeutics, Inc. | Phase 3 |
| Completed | Effects of Interleukin-1 Beta on Low Testosterone Levels in Men With Obesity and Metabolic Syndrome NCT02672592 | University Hospital, Basel, Switzerland | Phase 3 |
| Completed | Phlebotomy Study of Testosterone Undecanoate NCT02670343 | Clarus Therapeutics, Inc. | Phase 1 / Phase 2 |
| Withdrawn | Assessing the Efficacy of Clomiphene Citrate in Patients With Azoospermia and Hypoandrogenism NCT02137265 | University of Illinois at Chicago | N/A |
| Terminated | Effects of Transdermal Testosterone and/or Monthly Vitamin D on Fall Risk in Pre--frail Hypogonadal Seniors NCT02419105 | University of Zurich | Phase 3 |
| Completed | Subcutaneous Testosterone Enanthate Safety in Adult Men Diagnosed With Hypogonadism NCT02504541 | Antares Pharma Inc. | Phase 3 |
| Completed | Efficacy of Fenugreek Seed and Lespedeza Cuneata in TDS NCT03057899 | Pusan National University Hospital | Phase 4 |
| Completed | Testosterone Therapy in Hypogonadal Men Treated With Opioids NCT02433730 | Marianne Andersen | Phase 4 |
| Terminated | Psychological Outcomes in Isolated GnRH Deficiency NCT02356172 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | — |
| Completed | Hormonal Predictors of Oncologic Surgery NCT02471157 | Weill Medical College of Cornell University | — |
| Completed | Testosterone Replacement Therapy and Liraglutide Effects on Weight Loss in Hypogonadism. NCT03619330 | University Medical Centre Ljubljana | Phase 4 |
| Completed | Oral Testosterone for the Treatment of Hypogonadism in Males NCT02222558 | TesoRx Pharma, LLC | Phase 2 |
| Completed | Pharmacokinetic Study of Subcutaneous Testosterone Enanthate NCT02233751 | Antares Pharma Inc. | Phase 1 |
| Completed | Evaluation of Furosap in Human Volunteers NCT02748005 | Chemical Resources | N/A |
| Completed | Symptoms and Clinical Signs of Hypogonadism in Testicular Cancer Survivors NCT02240966 | Rigshospitalet, Denmark | — |
| Completed | Subcutaneous Testosterone Replacement Efficacy and Safety in Adult Men Diagnosed With Hypogonadism NCT02159469 | Antares Pharma Inc. | Phase 3 |
| Completed | MRI Substudy; Metabolic Changes Due to Iatrogenic Hypogonadism NCT02102646 | Herlev Hospital | Phase 4 |
| Withdrawn | Androgen Regulation of Priapism in Sickle Cell Disease NCT01940718 | Johns Hopkins University | EARLY_Phase 1 |
| Withdrawn | An Efficacy and Safety Study of ABT-SLV176 for the Treatment of Hypogonadal Men NCT02082197 | AbbVie | Phase 3 |
| Completed | The Efficacy Study of FUROSAP: A Testosterone Booster Supplement In Humans. NCT02702882 | Chemical Resources | N/A |
| Terminated | Effect of Testosterone on Endothelial Function and Microcirculation in Type 2 Diabetic Patients With Hypogonad NCT01084369 | Tameside Hospital NHS Foundation Trust | Phase 4 |
| Completed | Pharmacokinetic Study of Testosterone Enanthate NCT01887418 | Antares Pharma Inc. | Phase 1 / Phase 2 |
| Completed | Clomiphene Citrate for the Treatment of Low Testosterone Associated With Chronic Opioid Pain Medication Admini NCT01880086 | Weill Medical College of Cornell University | Phase 2 |
| Completed | Testosterone, Metformin, or Both, for Hypogonadism in Obese Males NCT02514629 | Fundación Pública Andaluza para la Investigación de Málaga en Biomedicina y Salud | Phase 3 |
| Completed | Visceral Adiposity Index and Triglyceride/High-density Lipoprotein Cholesterol Ratio in the Congenital Hypogon NCT02111434 | Gulhane School of Medicine | Phase 4 |
| Completed | The Effect of Testosterone Topical Solution (LY900011) in Hypogonadal Men With Suboptimal Response to a Topica NCT01893281 | Eli Lilly and Company | Phase 4 |
| Completed | Testosterone Replacement in Non-alcoholic Steatohepatitis (TEREPINS) NCT01919294 | Sheffield Teaching Hospitals NHS Foundation Trust | Phase 2 |
| Completed | Study of the Effect of Testosterone Treatment on Metabolic Parameters and Urinary Symptoms in Bariatric Patien NCT02248467 | University of Florence | — |
| Completed | A Study in Men With Low Testosterone to Measure the Effects of Testosterone Solution on Testosterone Levels, S NCT01816295 | Eli Lilly and Company | Phase 3 |
| Completed | A Study of the Efficacy and Safety of Corifollitropin Alfa (MK-8962) in Combination With Human Chorionic Gonad NCT01709331 | Organon and Co | Phase 3 |
| Unknown | Testosterone Undecanoate and Quality of Life of Men and Spouses NCT01758029 | Meir Medical Center | — |
| Completed | Study of the Prevalence and Associated Factors With Hypogonadism in HIV + Men NCT02665559 | Tourcoing Hospital | — |
| Unknown | Testogel® (Testosterone Gel 50mg/5g) in the Treatment of Male Hypogonadism NCT01786473 | Laboratoires Besins International | Phase 3 |
| Completed | Vitamin D Treatment and Hypogonadism in Men NCT01748370 | Medical University of Graz | Phase 4 |
| Completed | TRT on BPH Hypoganadal MetS Patients. Florence-PROTEST NCT02366975 | University of Florence | Phase 4 |
| Completed | Oral Testosterone for the Treatment of Hypogonadism NCT01717768 | TesoRx Pharma, LLC | Phase 2 |
| Withdrawn | Testosterone and Pain Sensitivity NCT01689896 | Johns Hopkins University | Phase 4 |
| Completed | Hormonal Regulation of Puberty and Fertility NCT01511588 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Recruiting | Inherited Reproductive Disorders NCT01500447 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Completed | Development and Validation of in Vitro Cell-based Bioassays for Nuclear Receptor Activation NCT02434562 | Universitaire Ziekenhuizen KU Leuven | — |
| Completed | Testosterone Therapy of Men With Type 2 Diabetes Mellitus (T2DM) NCT01560546 | Marianne Andersen | Phase 4 |
| Terminated | Testosterone and Alendronate in Hypogonadal Men NCT01460654 | Massachusetts General Hospital | Phase 2 |
| Completed | CYP19A1 (Cytochrome P450 Family 19 Subfamily A Member 1) Gene and Pharmacogenetics of Response to Testosterone NCT01378299 | VA Office of Research and Development | Phase 1 |
| Completed | A Study of Ejaculatory Dysfunction in Men With Low Testosterone Levels NCT01419236 | Eli Lilly and Company | Phase 2 |
| Withdrawn | Testosterone Therapy in Heart Failure NCT01377103 | Cedars-Sinai Medical Center | N/A |
| Completed | A One Year Open Label Study for the Treatment of Hypogonadism (Low Testosterone) in Men Who Have Completed ZA- NCT01386567 | Repros Therapeutics Inc. | Phase 2 |
| Completed | Pharmacokinetics, Metabolism, Efficacy, and Safety Study of Two Testosterone Matrix Transdermal Systems NCT01323140 | Watson Pharmaceuticals | Phase 2 |
| Terminated | NEBIDO in Symptomatic Late Onset Hypogonadism (SLOH) NCT01092858 | Bayer | Phase 4 |
| Completed | A Study to Evaluate the Potential for Interpersonal Transfer of Testosterone Following Single Dose Application NCT01172366 | Acrux DDS Pty Ltd | — |
| Completed | Efficacy of an Intranasal Testosterone Product NCT01252745 | Acerus Pharmaceuticals Corporation | Phase 2 |
| Completed | Pharmacokinetic and Comparative Bioavailability Study of Testosterone Absorption After Administration of Testo NCT01133548 | AbbVie | Phase 1 |
| Completed | Testosterone Replacement in Men With Diabetes and Obesity NCT01127659 | University at Buffalo | Phase 4 |
| Completed | Quality of Life With TESTIM® NCT01148433 | Ferring Pharmaceuticals | — |
| Completed | Dose Titration Investigation of the Pharmacokinetics of Testosterone Transdermal Systems in Hypogonadal Men NCT01104246 | Watson Pharmaceuticals | Phase 1 |
| Completed | Study of Serum Testosterone Levels in Non-dosed Females After Secondary Exposure NCT00998933 | Solvay Pharmaceuticals | Phase 1 |
| Completed | Follow-up of Serum Androgen Profile After Bariatric Surgery in Men With Obesity Related Hypogonadotropic Hypog NCT00624624 | Rijnstate Hospital | — |
| Completed | Efficacy and Tolerability of an Intra-Nasal Testosterone Product NCT00975650 | Acerus Pharmaceuticals Corporation | Phase 2 |
| Completed | Metabolic Syndrome Criteria and the Effect of Testosterone Treatment in Young Men With Hypogonadism NCT01160341 | Gulhane School of Medicine | Phase 4 |
| Withdrawn | Effect of Testosterone Gel Replacement on Fat Mass in Males With Low Testosterone Levels and Diabetes NCT00440440 | Diabetes Center of the Southwest | Phase 4 |
| Completed | The Effect of Testosteron Replacement Treatment on the Fibroblast Growth Factor-23, Asymmetric Dimethylarginin NCT02111473 | Gulhane School of Medicine | Phase 4 |
| Completed | Estrogen Dosing in Turner Syndrome: Pharmacology and Metabolism NCT00837616 | Nemours Children's Clinic | Phase 4 |
| Completed | To Determine the Effects of Deodorant, Antiperspirant and Washing on the Pharmacokinetics of 2% Testosterone M NCT00857168 | Acrux DDS Pty Ltd | Phase 1 |
| Completed | Reandron in Diabetic Men Witn Low Testosterone Level NCT00613782 | Austin Health | Phase 2 / Phase 3 |
| Completed | Effects of Testosterone Plus Dutasteride or Placebo on Muscle Strength, Body Composition and Metabolism in Tra NCT04545450 | Unita Complessa di Ostetricia e Ginecologia | Phase 3 |
| Completed | A Trial to Evaluate the Ongoing Skin Safety of Testosterone MD-Lotion Formulations NCT00857454 | Eli Lilly and Company | Phase 3 |
| Completed | ORAL T-6: Oral Androgens in Man-6 NCT00663793 | University of Washington | Phase 1 |
| Withdrawn | Nebido Versus Placebo in Elderly Men With Typical Symptoms of Late Onset Hypogonadism Over a Period of 54 Week NCT00710827 | Bayer | Phase 4 |
| Terminated | Androgen Deprivation Therapy Study NCT00743327 | National Institute on Aging (NIA) | — |
| Completed | Efficacy Study for Use of Dutasteride (Avodart) With Testosterone Replacement NCT00752869 | The Miriam Hospital | Phase 4 |
| Completed | Pharmacokinetic Study of Oral Testosterone (T) Ester Formulations in Hypogonadal Men NCT00695110 | Clarus Therapeutics, Inc. | Phase 2 |
| Completed | Testosterone Replacement Therapy Decreases Plasma Paraoxonase 1 Enzyme Activity In Male Patients With Hypogona NCT01107067 | Gulhane School of Medicine | Phase 4 |
| Completed | A Titration Trial to Determine the Effectiveness of Testosterone MD-Lotion (Cutaneous Solution) Formulations NCT00702650 | Eli Lilly and Company | Phase 3 |
| Completed | NASOBOL in Hypogonadal Men in Comparison to Testosterone Levels in Normal Healthy Male Volunteers NCT00647868 | Acerus Pharmaceuticals Corporation | Phase 1 |
| Unknown | Odense Androgen Study - The Effect of Testim and Training in Hypogonadal Men NCT00700024 | Odense University Hospital | Phase 4 |
| Completed | Effects of Replacement Therapy With Sexual Steroid Hormones on the Insulin Sensitivity of Hypogonadal Man NCT02847806 | University Hospital, Caen | Phase 3 |
| Completed | ESPRIT Study in Hypogonadal Men NCT01143818 | Abbott | — |
| Completed | Pilot Pharmacokinetic Study of Oral Testosterone Ester Formulations in Hypogonadal Men NCT02697188 | Clarus Therapeutics, Inc. | Phase 2 |
| Terminated | Testosterone for Penile Rehabilitation After Radical Prostatectomy NCT00848497 | Mohit Khera | EARLY_Phase 1 |
| Completed | A Study of the Pharmacokinetics of Testosterone Metered Dose (MD)-Lotion Formulations NCT00857961 | Eli Lilly and Company | Phase 2 |
| Terminated | Open-Label Study of ARD-0403 in Testosterone Deficient Men NCT00562731 | Ardana Bioscience Ltd | Phase 3 |
| Completed | Testosterone and Lipolysis, Insulin Sensitivity and Protein Metabolism NCT00613288 | University of Aarhus | N/A |
| Completed | A Study of Fortigel Testosterone Gel 2% in Males With Low Testosterone NCT00522431 | Endo Pharmaceuticals | Phase 3 |
| Completed | Effect of Testosterone Replacement on Insulin Resistance NCT00487734 | McGuire Research Institute | Phase 4 |
| Terminated | Detection and Treatment of Endocrine Abnormalities in Childhood Cancer Survivors and Hematopoietic Stem Cell T NCT00504218 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | — |
| Completed | Survey of Testosterone Levels in Male Cancer Patients NCT00483418 | Beth Israel Medical Center | — |
| Completed | Efficacy and Tolerability of Testogel/Nebido in Combination With Exercise and Diet in Hypogonadal Male Patient NCT00847314 | Bayer | — |
| Completed | Open-Label Study of ARD-0403 in Testosterone Deficient Men NCT00448955 | Ardana Bioscience Ltd | Phase 3 |
| Completed | Effect of Testosterone Therapy in Men With Alzheimer's Disease and Low Testosterone NCT00392912 | Michael E. DeBakey VA Medical Center | N/A |
| Completed | Testosterone Treatment for Hypogonadal Men NCT00433199 | Abbott | Phase 3 |
| Completed | The Therapy of Nebido as Mono or in Combination With PDE-5 Inhibitors in Hypogonadal Patients With Erectile Dy NCT00421460 | Chulalongkorn University | Phase 4 |
| Completed | Efficacy and Safety of Fispemifene in the Treatment of Hypogonadal Men With Chronic Obstructive Pulmonary Dise NCT01061970 | QuatRx Pharmaceuticals Company | Phase 2 |
| Completed | Efficacy and Safety Evaluating Fispemifene in the Treatment of Hypogonadal Men With Erectile Dysfunction Unres NCT00415571 | QuatRx Pharmaceuticals Company | Phase 2 |
| Completed | Prevalence of Hypogonadism in Male Cancer Patients NCT00472940 | Baylor College of Medicine | — |
| Withdrawn | Analgesic Efficacy of Testosterone Replacement in Hypogonadal Opioid-treated Chronic Pain Patients: A Pilot St NCT00398034 | James J. Peters Veterans Affairs Medical Center | Phase 2 |
| Completed | 28-Day Study of Testosterone Co-administered With Dutasteride in Hypogonadal Men NCT00398580 | GlaxoSmithKline | Phase 2 |
| Completed | Study On Bioavailability And Pharmacokinetics Of Various Doses Of Testosterone Administered With And Without D NCT00400335 | GlaxoSmithKline | Phase 1 |
| Completed | Use of Nebido® to Assess Tolerability and Treatment Outcomes in Daily Clinical Practice NCT00410306 | Bayer | — |
| Completed | Pharmacokinetics of Testosterone Lotion in the Treatment of Hypogonadal Males NCT00372008 | Acrux DDS Pty Ltd | Phase 2 |
| Completed | Effects of Testosterone Gel on Carbohydrate and Lipid Metabolism In Elderly Obese Men NCT00365794 | University of Southern California | Phase 2 |
| Completed | Testosterone for Men With Insulin Treated Type 2 Diabetes NCT00349362 | Barnsley Hospital | Phase 4 |
| Completed | Effects of Testosterone Replacement on Pain Sensitivity and Pain Perception NCT00351819 | Boston University | Phase 2 |
| Completed | Long-term Safety Study of Intramuscular Injections of 750 mg and 1000 mg Testosterone Undecanoate in Hypogonad NCT00467870 | Endo Pharmaceuticals | Phase 3 |
| Withdrawn | Does Testosterone Improve Function in Hypogonadal Older Men NCT00304213 | North Florida Foundation for Research and Education | Phase 4 |
| Completed | A Preliminary Clinical Study to Evaluate Fispemifene in the Treatment of Hypogonadism NCT00290134 | QuatRx Pharmaceuticals Company | Phase 2 |
| Completed | Testosterone for Peripheral Vascular Disease NCT00504712 | Barnsley Hospital | Phase 4 |
| Completed | Cycled Testosterone Replacement Study NCT00957528 | The University of Texas Medical Branch, Galveston | Phase 1 |
| Completed | Transdermal Testosterone Gel/Effect on Erection Quality as Measured by DIR NCT00425568 | Lamm, Steven, M.D. | — |
| Completed | Study of 3 Doses of ARD-0403 in Testosterone Deficient Men NCT00597051 | Ardana Bioscience Ltd | Phase 2 |
| Completed | Co-Administering Testosterone With PDE5 Inhibitors in ED Patients Non Responders to PDE5 Inhibitors Alone NCT00244023 | SELARL du Dr Jacques BUVAT | Phase 3 |
| Unknown | The Effect of IM Testosterone Undecanoate on Biochemical and Anthropometric Characteristics of Metabolic Syndr NCT00696748 | Russian Academy of Medical Sciences | Phase 3 |
| Completed | Efficacy of Nebido on Bone Mineral Density (BMD) in Hypogonadal Paraplegic Patients With Confirmed Osteoporosi NCT00838838 | Bayer | — |
| Completed | Older Men and Testosterone NCT00119483 | University Hospital of North Norway | N/A |
| Terminated | A Study to Test a Measure of Symptoms of Older Men With Low Testosterone On and Off Testosterone Replacement T NCT00254553 | Merck Sharp & Dohme LLC | Phase 2 |
| Completed | Bone Density and Serum Testosterone in Male Methadone Maintained Patients NCT00170339 | Hennepin Healthcare Research Institute | — |
| Completed | Oral Androgens in Man-3 (ORAL T-3) Pharmacokinetics of Oral Testosterone NCT00161421 | University of Washington | Phase 2 |
| Completed | TRADE-Testosterone Replacement and Dutasteride Effectiveness NCT00194675 | University of Washington | Phase 4 |
| Terminated | TOM: Testosterone in Older Men With Sarcopenia NCT00240981 | Boston Medical Center | Phase 4 |
| Completed | Exercise and Testosterone Therapy in Elderly Men With Physical Frailty NCT00345969 | Washington University School of Medicine | Phase 3 |
| Completed | Efficacy and Safety of Androgel in the Treatment of Hypogonadal and Low Testosterone Men With Type 2 Diabetes NCT00141492 | Solvay Pharmaceuticals | Phase 2 |
| Completed | Anastrozole Administration in Elderly Hypogonadal Men NCT00136695 | Massachusetts General Hospital | Phase 2 |
| Completed | Study of DHT-Gel to Treat the Symptoms of Low Testosterone in Men 55-80 NCT00163566 | ASCEND Therapeutics | Phase 2 |
| Completed | Testosterone Replacement in Older Men and Atherosclerosis Progression NCT00287586 | Brigham and Women's Hospital | Phase 4 |
| Completed | The Effects of Testosterone on Prostate Tissue (ACYP-1) NCT00161486 | University of Washington | Phase 1 |
| Completed | Testosterone and Growth Hormone for Bone Loss in Men NCT00080483 | University of Pennsylvania | Phase 2 |
| Completed | Effects of Aromatase Inhibition Versus Testosterone in Older Men With Low Testosterone: Randomized-Controlled NCT00104572 | National Institute on Aging (NIA) | Phase 2 |
| Completed | A Study Using Recombinant Human Luteinizing Hormone (r-hLH, Luveris®) in the Treatment of Chinese Women With H NCT01084265 | Merck KGaA, Darmstadt, Germany | Phase 3 |
| Completed | Steady-State Feedback Actions of Testosterone on Luteinizing Hormone Secretion in Young and Older Men NCT00431197 | Mayo Clinic | Phase 1 |
| Completed | Testosterone Replacement in Metabolic Syndrome and Inflammation NCT01123278 | University of Roma La Sapienza | Phase 4 |
| Completed | Testosterone Replacement Therapy in Chronic Spinal Cord Injury NCT00266864 | VA Office of Research and Development | Phase 2 / Phase 3 |
| Completed | Assessment of Long Term Treatment With Testosterone Undecanoate in Males With Hypogonadism NCT00220298 | Bayer | Phase 3 |
| Unknown | Three-Year Trial on a New Testosterone Gel NCT00204269 | University Hospital Muenster | Phase 3 |
| Completed | The Effect of Testosterone on Mood and Quality of Life NCT00202462 | Seattle Institute for Biomedical and Clinical Research | N/A |
| Completed | Effect of Varying Testosterone Levels on Insulin Sensitivity in Normal and IHH Men NCT00470990 | National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) | N/A |
| Completed | Prevention of Osteoporosis in Men With Prostate Cancer NCT00048841 | National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) | Phase 3 |
| Terminated | Prevalence of Secondary Hypogonadism in Male Patients on Chronic Opioid Therapy for Cancer-Related Pain Syndro NCT00529230 | M.D. Anderson Cancer Center | — |
| Completed | Effects of Andriol Testocaps in Symptomatic Late-Onset Hypogonadism (43203) NCT00434824 | Merck Sharp & Dohme LLC | Phase 2 |
| Completed | Provocative Testing Using LHRH and hCG of the Pituitary-Gonadal Axis in Persons With Spinal Cord Injury. NCT00223860 | US Department of Veterans Affairs | N/A |
| Completed | Treatment of Sexual Dysfunction in Hypogonadal Men With Epilepsy With Testosterone and Either Anastrozole or P NCT00179517 | Beth Israel Deaconess Medical Center | Phase 2 |
| Terminated | Follicle Stimulating Hormone (FSH) to Improve Testicular Development in Men With Hypogonadism NCT00064987 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | Phase 2 |
| Completed | Estrogen Treatment (Oral vs. Patches) in Turner Syndrome NCT00140998 | Nemours Children's Clinic | Phase 3 |
| Completed | Leuprolide in Treating Adults With Hypogonadotropism NCT00004438 | University of Chicago | N/A |
| Completed | Safety of Testosterone Undecanoate i.m. in Hypogonadal Men NCT00452322 | University Hospital Muenster | Phase 2 |
| Completed | Investigating the Regulation of Reproductive Hormones in Adult Men NCT00392457 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | N/A |
| Completed | Leuprolide in Determining the Cause of Gonadotropin Deficiency NCT00004426 | University of Chicago | N/A |
| Completed | Effects on the Brain of Lupron Induced Hypogonadotropic Hypogonadism With and Without Testosterone Replacement NCT00001412 | National Institute of Mental Health (NIMH) | — |
| Completed | Study of Gonadotropin-Releasing Hormone Pulse Frequency in Sexual Maturation and in the Menstrual Cycle NCT00004335 | National Center for Research Resources (NCRR) | — |
| Completed | Ovarian Follicle Function in Patients With Primary Ovarian Failure NCT00001275 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | — |
| Withdrawn | Influence of Administration Route of Testosterone on Male Fertility NCT00705796 | Acerus Pharmaceuticals Corporation | Phase 1 |