Androxal in Male Infertility
Baylor College of Medicinen = 022 Sept 2014 to 2 Aug 2016
Infertility
PepBank has 48 enclomiphene studies with results. 46 of them gave enclomiphene, with 153 results, grouped by what the studies measured. In each group, results from studies in people come first. Data as of 2026-10-30.
Searches 153 results and 80 papers. Newer studies from Europe PMC
Identifiers, parent molecule, targets and development stage, from curated data.
Enclomiphene is a defined small molecule with E geometry at its central double bond. Clomiphene is a mixture of enclomiphene and zuclomiphene. This record covers isolated enclomiphene, including its citrate salt. EMA describes blockade of estrogen feedback to restore gonadotrophin release. Its EnCyzix decision cites absent symptom evidence and venous thromboembolism risk. It refused authorisation on 6 April 2018.
| Target | Action | Evidence |
|---|---|---|
| Estrogen receptor | Selective estrogen receptor modulator | curated database or regulator descriptionSource (opens in a new tab) |
Structure from the identity record.
Draws the structure in your browser with RDKit (about 2.3 MB, loaded once).
SMILES fromPubChem CID 1548953(opens in a new tab)
CCN(CC)CCOC1=CC=C(C=C1)/C(=C(\C2=CC=CC=C2)/Cl)/C3=CC=CC=C3People first in each area, then animals, then lab cells. Counts are exact and come from studies that gave the peptide.
PepBank reads each paper before it shows the results. This search looks in Europe PMC for newer papers that PepBank has not read yet.
Counts are exact and come from studies that gave the peptide.
Studies by year
48 of 80 studies have results (60%), published 1977 to 2026. Top row: every study. Bottom row: studies with results about Enclomiphene, by class. The rows use different scales.
Studies80 in all, 1977 to 2026
Studies with results48 in all, 1977 to 2026
Retracted studies are left out. A study with results in two classes counts in both.
AI wrote and checked these results. AI can make mistakes, so check important results against the source.
Registered trials that test the peptide, with phase, status and dates. A dot marks trials with posted results.
25 trials match. Highest phase first. Data from ClinicalTrials.gov.
25 trials · 24 completed · 1 stopped early · 10 with posted results
Study to Evaluate the Safety and Efficacy of Androxal™ Treatment in Men With Secondary Hypogonadism
NCT00962637Mar 2006 to May 2007
To Evaluate Sperm Parameters in Men With Secondary Hypogonadism Previously Treated With Topical Testosterone
NCT00706719Jun 2008 to Aug 2009
Study to Evaluate the Efficacy of Androxal in Controlling Blood Glucose in Men With Type-2 Diabetes Mellitus
NCT01191320Oct 2010 to Dec 2011
Normalization of Morning Testosterone Levels in Men With Secondary Hypogonadism
NCT01270841Jan 2011 to Dec 2011
The Effect on Androxal Versus Androgel on Morning Testosterone in Men With Secondary Hypogonadism (Low Testosterone)
NCT01386606Jun 2011 to Oct 2011
A One Year Open Label Study for the Treatment of Hypogonadism (Low Testosterone) in Men Who Have Completed ZA-203
NCT01386567Jul 2011 to Jan 2013
Safety Study of Enclomiphene Citrate in the Treatment of Men With Secondary Hypogonadism
NCT01534208May 2012 to Oct 2013
Phase III Study to Evaluated Morning Testosterone Normalization in Men With Secondary Hypogonadism
NCT01532414Aug 2012 to Mar 2013
Assessment of the Effects of Enclomiphene Citrate on Bone Mineral Density in Men With Secondary Hypogonadism
NCT01619683Sept 2012 to Sept 2014
25 trials · 24 completed · 1 stopped early · 10 with posted results · source ClinicalTrials.gov (opens in a new tab)
Baylor College of Medicinen = 022 Sept 2014 to 2 Aug 2016
Infertility
Repros Therapeutics Inc.n = 151Aug 2012 to Mar 2013
Secondary Hypogonadism
Repros Therapeutics Inc.n = 181Nov 2012 to Sept 2013
Secondary Hypogonadism
Repros Therapeutics Inc.n = 300Sept 2012 to Sept 2014
Effect of Treatment on Bone Mineral Density
Repros Therapeutics Inc.n = 120Jan 2014 to Sept 2014
Secondary Hypogonadism
Repros Therapeutics Inc.n = 120Jan 2014 to Aug 2014
Secondary Hypogonadism
Repros Therapeutics Inc.n = 499May 2012 to Oct 2013
Secondary Hypogonadism
Repros Therapeutics Inc.n = 104Mar 2006 to May 2007
Secondary Hypogonadism
Repros Therapeutics Inc.n = 300Nov 2012 to Apr 2014
Secondary Hypogonadism
Repros Therapeutics Inc.n = 194Mar 2006 to May 2007
Secondary Hypogonadism
Repros Therapeutics Inc.n = 5011 Jan 2016 to 2 May 2017
Acquired Hypogonadotropic Hypogonadism · Obesity
Repros Therapeutics Inc.n = 60Jun 2011 to Oct 2011
Secondary Hypogonadism
Repros Therapeutics Inc.n = 17Jun 2008 to Aug 2009
Secondary Hypogonadism
Repros Therapeutics Inc.n = 83Jan 2011 to Dec 2011
Secondary Hypogonadism
Repros Therapeutics Inc.n = 102Oct 2010 to Dec 2011
Type 2 Diabetes Mellitus · Secondary Hypogonadism
Repros Therapeutics Inc.n = 48Jul 2011 to Jan 2013
Hypogonadism · Low Testosterone
Repros Therapeutics Inc.n = 1631 Dec 2013 to 31 Dec 2013
Bioequivalence
Repros Therapeutics Inc.n = 6Dec 2014 to Jan 2015
Secondary Hypogonadism
Repros Therapeutics Inc.n = 24Aug 2014 to Aug 2014
Pharmacokinetics
Repros Therapeutics Inc.n = 26Aug 2013 to Aug 2014
Secondary Hypogonadism
Repros Therapeutics Inc.n = 9Oct 2013 to Nov 2013
Pharmacokinetics · Tolerability
Repros Therapeutics Inc.n = 30May 2014 to Jul 2014
Drug-drug Interaction
Repros Therapeutics Inc.n = 12Jun 2014 to Jul 2014
Normal Volunteers
Repros Therapeutics Inc.n = 54Apr 2014 to May 2014 (primary)
Healthy
Repros Therapeutics Inc.n = 19Aug 2013 to Jan 2014
Secondary Hypogonadism
Studies on this peptide. Some have results. The others have none yet.
80 studies match. Retracted studies are left out.
Showing 25 of 80 studiesquery qry_b7b490cb68f08156c379924b
48 studies in all, 18 on this page
Animal study (in vivo) · mouse · 1990
Gottardis et al. 1990Cancer researchcited by 63
PMID 2334915PUB-02334915
Randomized controlled trial · 2016
Kim et al. 2016BJU internationalcited by 54
PMID 26496621DOI 10.1111/bju.13337PUB-26496621
Animal study (in vivo) · rat · 1981
Jordan et al. 1981Endocrinologycited by 53
PMID 6781873DOI 10.1210/endo-108-4-1353PUB-06781873
Randomized controlled trial · 2013
Kaminetsky et al. 2013The journal of sexual medicinen = 7cited by 52
PMID 23530575DOI 10.1111/jsm.12116PUB-23530575
Randomized controlled trial · 2014
Wiehle et al. 2014Fertility and sterilitycited by 49
PMID 25044085DOI 10.1016/j.fertnstert.2014.06.004PUB-25044085
In vitro (cells) · 2016
Nelson et al. 2016Virusescited by 38
PMID 27490565PMC4997570DOI 10.3390/v8080206PUB-27490565
In vitro (cells) · 2001
Maertens et al. 2001British journal of pharmacologycited by 31
PMID 11156570PMC1572544DOI 10.1038/sj.bjp.0703786PUB-11156570
Randomized controlled trial · 2013
Wiehle et al. 2013BJU internationalcited by 31
PMID 23875626PMC4155868DOI 10.1111/bju.12363PUB-23875626
In vitro (cell-free) · rat · 1984
Hiemke et al. 1984Journal of steroid biochemistrycited by 30
PMID 6098784DOI 10.1016/0022-4731(84)90028-1PUB-06098784
In vitro (cells) · 1983
Murphy et al. 1983The Journal of clinical endocrinology and metabolismcited by 28
PMID 6408114DOI 10.1210/jcem-57-2-373PUB-06408114
In vitro (cells) · rat · 1999
Fitzpatrick et al. 1999Endocrinologycited by 27
PMID 10465261DOI 10.1210/endo.140.9.7006PUB-10465261
In vitro (cells) · mouse · 1986
Schmidt et al. 1986American journal of obstetrics and gynecologycited by 26
PMID 3083679DOI 10.1016/0002-9378(86)90444-8PUB-03083679
Animal study (in vivo) · acanthopagrus schlegeli · 2001
Lee et al. 2001Comparative biochemistry and physiology. Part B, Biochemistry & molecular biologycited by 24
PMID 11399474DOI 10.1016/s1096-4959(01)00337-2PUB-11399474
In vitro (cells) · rat · 1977
Dannies et al. 1977Endocrinologycited by 21
PMID 908269DOI 10.1210/endo-101-4-1151PUB-00908269
In vitro (cell-free) · calf · 1982
Sasson et al. 1982The Journal of biological chemistrycited by 21
PMID 7118895DOI 10.1016/s0021-9258(18)33795-5PUB-07118895
Animal study (in vivo) · mouse · 1991
Jordan et al. 1991Annals of the New York Academy of Sciencescited by 19
PMID 1905895DOI 10.1111/j.1749-6632.1991.tb37886.xPUB-01905895
Animal study (in vivo) · rat · 1985
Kronenberg et al. 1985Endocrinologycited by 19
PMID 2411529DOI 10.1210/endo-117-4-1480PUB-02411529
Animal study (in vivo) · rat · 1998
Turner et al. 1998Endocrinologycited by 19
PMID 9724022DOI 10.1210/endo.139.9.6177PUB-09724022
31 studies in all, 7 on this page
PubMed tag: none · 2007
Teramoto et al. 2007Reproductive biomedicine onlinecited by 80
PMID 17697488DOI 10.1016/s1472-6483(10)60701-8PUB-17697488
PubMed tag: none · 1999
Young et al. 1999Fertility and sterilitycited by 73
PMID 10202872DOI 10.1016/s0015-0282(98)00537-8PUB-10202872
PubMed tag: none · 2009
Kaminetsky et al. 2009Expert opinion on investigational drugscited by 23
PMID 19938905DOI 10.1517/13543780903405608PUB-19938905
PubMed tag: Clinical Trial · 2009
Ghobadi et al. 2009Journal of clinical pharmacologycited by 22
PMID 19033451DOI 10.1177/0091270008328096PUB-19033451
PubMed tag: none · 1991
Fritz et al. 1991American journal of obstetrics and gynecologycited by 21
PMID 1906682DOI 10.1016/0002-9378(91)90247-oPUB-01906682
PubMed tag: Review · 2016
Rodriguez et al. 2016Expert opinion on pharmacotherapycited by 20
PMID 27337642PMC5009465DOI 10.1080/14656566.2016.1204294PUB-27337642
PubMed tag: Review · 2009
Hill et al. 2009IDrugs : the investigational drugs journalcited by 19
PMID 19204885PUB-19204885
Page 1 of 1
Kaminetsky J · The journal of sexual medicine · 2013
Randomized controlled trial · 8 results
Kim ED · BJU international · 2016
Randomized controlled trial · 4 results
Wiehle RD · Fertility and sterility · 2014
Randomized controlled trial · 5 results
Wiehle R · BJU international · 2013
Randomized controlled trial · 17 results
Saffati G · Translational andrology and urology · 2024
Observational study · 6 results
Thomas J · Cureus · 2023
Observational study · 7 results
Tariq MN · Cureus · 2026
Case report or series · 2 results
Schramm RD · Journal of animal science · 1991
Animal study (in vivo) · cow · 8 results
Chang CF · Journal of animal science · 1987
Animal study (in vivo) · cow · 4 results
Gregg DW · Journal of animal science · 1990
Animal study (in vivo) · sheep · 12 results
Gottardis MM · Cancer research · 1990
Animal study (in vivo) · mouse · 1 result
Jordan VC · Endocrinology · 1981
Animal study (in vivo) · rat · 1 result
Lee YH · Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology · 2001
Animal study (in vivo) · acanthopagrus schlegeli · 1 result
Turner RT · Endocrinology · 1998
Animal study (in vivo) · rat · 2 results
Jordan VC · Annals of the New York Academy of Sciences · 1991
Animal study (in vivo) · mouse · 1 result
Kronenberg MS · Endocrinology · 1985
Animal study (in vivo) · rat · 4 results
Wing LY · Endocrinology · 1988
Animal study (in vivo) · rat · 3 results
Fontenot GK · BJU international · 2016
Animal study (in vivo) · mouse · 8 results
Clark JH · Journal of steroid biochemistry · 1983
Animal study (in vivo) · rat · 6 results
Burghardt RC · Biology of reproduction · 1987
Animal study (in vivo) · rat · 2 results
Ghraf R · Journal of neurochemistry · 1982
Animal study (in vivo) · rat · 6 results
Kirchhoff J · Brain research · 1983
Animal study (in vivo) · rat · 5 results
Weissenberg R · Andrologia · 1992
Animal study (in vivo) · rat · 9 results
Burghardt RC · Biology of reproduction · 1984
Animal study (in vivo) · rat · 5 results
Franz-Odendaal TA · Plastic surgery (Oakville, Ont.) · 2023
Animal study (in vivo) · danio rerio · 2 results
Westfahl PK · Experientia · 1989
Animal study (in vivo) · guinea pig · 2 results
Racowsky C · Journal of reproduction and fertility · 1989
Ex vivo tissue · hamster · 1 result
Nelson EA · Viruses · 2016
In vitro (cells) · 2 results
Maertens C · British journal of pharmacology · 2001
In vitro (cells) · 1 result
Murphy LC · The Journal of clinical endocrinology and metabolism · 1983
In vitro (cells) · 8 results
Fitzpatrick SL · Endocrinology · 1999
In vitro (cells) · rat · 2 results
Schmidt GE · American journal of obstetrics and gynecology · 1986
In vitro (cells) · mouse · 6 results
Dannies PS · Endocrinology · 1977
In vitro (cells) · rat · 6 results
Huang ES · Endocrinology · 1983
In vitro (cells) · sheep · 4 results
Marth C · Biochemical pharmacology · 1984
In vitro (cells) · 2 results
Opsahl MS · Human reproduction (Oxford, England) · 1996
In vitro (cells) · ovine · 6 results
Hiemke C · Journal of steroid biochemistry · 1984
In vitro (cell-free) · rat · 3 results
Sasson S · The Journal of biological chemistry · 1982
In vitro (cell-free) · calf · 3 results
Ghobadi C · Drug metabolism and pharmacokinetics · 2008
In vitro (cell-free) · 5 results
Kneussl ES · American journal of obstetrics and gynecology · 1982
In vitro (cell-free) · 2 results
Ruenitz PC · Drug metabolism and disposition: the biological fate of chemicals · 1981
In vitro (cell-free) · rabbit · 4 results
Riley D · General and comparative endocrinology · 1988
In vitro (cell-free) · nerodia · 1 result
Clark JH · Journal of steroid biochemistry · 1987
In vitro (cell-free) · rat · 1 result
Bitonti AJ · Anticancer research · 1996
In vitro (cell-free) · 1 result
Lopes MC · The Journal of steroid biochemistry and molecular biology · 1991
In vitro (cell-free) · 1 result
Okulicz WC · Journal of steroid biochemistry · 1988
In vitro (cell-free) · hamster · 1 result
Warren S · Cureus · 2026
Not a test of Enclomiphene alone · 3 results
Pakrasi PL · Life sciences · 2006
Not a test of Enclomiphene alone · 1 result
Approval and sport status, and the safety outcomes reported in study results. Laws and labels change, so check the regulator for the current status.
| Jurisdiction | Body | Status | As of | Source |
|---|---|---|---|---|
| US | FDA | The openFDA active ingredient search returned no matches. This confirms no matching entry in this database, not worldwide absence of approval. | 21 Oct 2026 | api.fda.gov (opens in a new tab) |
| EU | EMA | EnCyzix, enclomifene citrate, refusal dated 6 April 2018. | 21 Oct 2026 | ema.europa.eu (opens in a new tab) |
| Sport | WADA | Banned in sport (WADA S4.2) S4.2 prohibits anti-estrogens and SERMs at all times. | 2026 List | wada-ama.org (opens in a new tab) |
| Russia | Note | National medicinal registration was not established for this product. | 21 Oct 2026 | Not recorded |
18 safety results for Enclomiphene.
In hypogonadal men, decreased libido was less frequent with enclomiphene than clomiphene.
Observational studyn = 66
In hypogonadal men, reduced energy was less frequent with enclomiphene than clomiphene.
Observational studyn = 66
In hypogonadal men, mood changes were less frequent with enclomiphene than clomiphene.
Observational studyn = 66
In hypogonadal men, enclomiphene was associated with lower adverse event odds than clomiphene.
Observational studyn = 66
In a man with prior mitral valve repair, atrial flutter was detected after enclomiphene dose escalation, without established causality.
Case report or seriesn = 1
In athymic mice with human endometrial carcinoma, enclomiphene supported tumor growth as actively as tamoxifen.
Animal study (in vivo)mouse
In male mice, isolated enclomiphene did not affect testicular histology.
Animal study (in vivo)mouse
In male mice, profound Leydig cell effects were associated only with zuclomiphene, rather than enclomiphene.
Animal study (in vivo)mouse
In male mice, profound epididymal effects were associated only with zuclomiphene, rather than enclomiphene.
Animal study (in vivo)mouse
In male mice, profound seminal vesicle effects were associated only with zuclomiphene, rather than enclomiphene.
Animal study (in vivo)mouse
In male mice, profound kidney effects were associated only with zuclomiphene, rather than enclomiphene.
Animal study (in vivo)mouse
In zebrafish exposed at 5.5 mm SL, enclomiphene increased interfrontal suture fusion compared with controls.
Animal study (in vivo)Danio rerio
In cultured mouse oocytes, enclomiphene adversely affected fertilization rates in a dose-dependent manner.
In vitro (cells)mouse
In cultured mouse embryos, enclomiphene adversely affected blastocyst formation rates in a dose-dependent manner.
In vitro (cells)mouse
In cultured mouse embryos, enclomiphene adversely affected degeneration rates in a dose-dependent manner.
In vitro (cells)mouse
In cultured mouse oocytes, fertilization rates did not differ significantly between enclomiphene and zuclomiphene.
In vitro (cells)mouse
In cultured mouse embryos, blastocyst formation rates did not differ significantly between enclomiphene and zuclomiphene.
In vitro (cells)mouse
In cultured mouse embryos, degeneration rates did not differ significantly between enclomiphene and zuclomiphene.
In vitro (cells)mouse
The doses that these studies used. They are not recommendations.
25 mg dailyHuman
6.25, 12.5 and 25 mgHuman
50 mg daily instead of 25 mg dailyHuman
three implants each containing 150 mgAnimal
30-cm implantAnimal
10 mgAnimal
6 of 27 shown
PepBank is a research reference. Talk to a doctor before you use any peptide.
Data version, change history and code for this peptide.
curl -s https:// pepbank.io/ v1/ briefs/ enclomipheneEvidence summary for Enclomiphene: counts by class, key results with sources, notices, data version.
In PepBank now:147 peptides, 6 blends and 13 other compounds97,577 study results from 17,383 studies8,473 clinical trialsUpdated
Top outcomes
The 8 outcome groups with the most study results, by evidence class.
Data version 308560. Bar length is the number of results, not the size of an effect.
Evidence matrix
Study results by outcome and evidence class. Arrows show how the measured outcome moved, not whether the change is good.
| Outcome group | Human | Animal | Lab | Computer model | Total |
|---|---|---|---|---|---|
| Sex hormones and fertilityReproductive and sexual health | Human: 32 results from 7 studies: 24 increase, 1 decrease, 6 no significant change, 1 not reported. Strongest design: Randomized controlled trial | Animal: 40 results from 12 studies: 6 increase, 16 decrease, 16 no significant change, 1 mixed, 1 not reported. Strongest design: Animal study (in vivo) | Lab: 17 results from 5 studies: 4 increase, 8 decrease, 5 no significant change. Strongest design: Ex vivo tissue | No results | 89 |
| Adverse eventsWhole body | Human: 5 results from 2 studies: 4 decrease, 1 not reported. Strongest design: Observational study | No results | No results | No results | 5 |
| Stress hormonesEndocrine and hormones | Human: 2 results from 1 study: 2 no significant change. Strongest design: Randomized controlled trial | No results | No results | No results | 2 |
| Bone and jointMusculoskeletal | Human: 1 result from 1 study: 1 no significant change. Strongest design: Randomized controlled trial | Animal: 1 result from 1 study: 1 increase. Strongest design: Animal study (in vivo) | No results | No results | 2 |
| Growth hormone and IGF-1Endocrine and hormones | Human: 1 result from 1 study: 1 decrease. Strongest design: Randomized controlled trial | No results | Lab: 1 result from 1 study: 1 increase. Strongest design: In vitro (cells) | No results | 2 |
| LipidsMetabolic and weight | Human: 1 result from 1 study: 1 no significant change. Strongest design: Randomized controlled trial | No results | No results | No results | 1 |
| Thyroid functionEndocrine and hormones | Human: 1 result from 1 study: 1 no significant change. Strongest design: Randomized controlled trial | No results | No results | No results | 1 |
| Receptor activity and mechanismWhole body | No results | Animal: 19 results from 8 studies: 3 increase, 7 decrease, 6 no significant change, 3 not reported. Strongest design: Animal study (in vivo) | Lab: 16 results from 11 studies: 8 decrease, 5 no significant change, 3 not reported. Strongest design: In vitro (cells) | No results | 35 |
| Tumor growthCancer | No results | Animal: 2 results from 2 studies: 1 increase, 1 not reported. Strongest design: Animal study (in vivo) | Lab: 5 results from 2 studies: 2 decrease, 3 mixed. Strongest design: In vitro (cells) | No results | 7 |
| PharmacokineticsPharmacology | No results | No results | Lab: 6 results from 2 studies: 1 decrease, 1 no significant change, 4 not reported. Strongest design: In vitro (cell-free) | No results | 6 |
| Antiviral activityInfection | No results | No results | Lab: 2 results from 1 study: 2 decrease. Strongest design: In vitro (cells) | No results | 2 |
| Kidney functionKidney and urinary | No results | Animal: 1 result from 1 study: 1 no significant change. Strongest design: Animal study (in vivo) | No results | No results | 1 |
12 outcome groups shown of 12 · 153 study results
Data version 308560. Shade grows with the number of results. Every cell shows the exact count.
Trials by phase
25 registered trials, grouped by phase and shown by status.
Source: ClinicalTrials.gov, data version 308560. Status is the registry status.