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Clomiphene Side Effects

The most commonly reported side effects of clomiphene include drug exposure during pregnancy, exposure during pregnancy, and nausea, based on 1,919 FDA adverse event reports from 2004 to 2025. 3.5% of reports found the drug to be ineffective.

Clomiphene side effects

Percentages show how often each reaction appears relative to total reports for clomiphene.

1
Drug Exposure During Pregnancy6.9%132
2
Exposure During Pregnancy4.6%88
3
Nausea4.4%84
4
Off Label Use4.2%81
5
Abortion Spontaneous4.0%77
6
Headache3.9%75
7
Drug Ineffective3.5%67
8
Fatigue3.3%63
9
Foetal Exposure During Pregnancy3.2%61
10
Abortion Spontaneous3.2%61
11
Vomiting3.1%59
12
Maternal Exposure During Pregnancy3.1%59
13
Diarrhoea3.0%57
14
Insomnia2.3%45
15
Pregnancy2.2%43

These are voluntary reports and do not establish that clomiphene caused these reactions.

Report severity

72.7%Serious1,396 reports
24.3%Hospitalizations466 reports
4.6%Fatal88 reports

Seriousness is determined by the reporter, not by OpenClaim.

Clomiphene drug interactions

Other drugs that appear in adverse event reports alongside clomiphene. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Metformin7.8%150
2
Sodium-oxybate5.4%104
3
Follitropin-alfa-beta4.5%87
4
Menotropins-fsh4.1%79
5
Testosterone3.1%60
6
Gonadotropin-chorionic2.4%47
7
Letrozole2.3%44
8
Progesterone1.9%36
9
Venlafaxine1.8%34
10
Choriogonadotropin-alfa1.7%32
11
Anastrozole1.5%29
12
Certolizumab-pegol1.5%28
13
Citalopram-hydrobromide1.4%26
14
Dupilumab1.4%26
15
Leuprolide1.3%25

Taken alongside

1
Ergocalciferol8.3%160
2
Acetaminophen6.6%127
3
Levothyroxine-sodium5.4%104
4
Progesterone5.0%96
5
Aspirin4.9%94
6
Metformin4.7%90
7
Folic-acid4.6%89
8
Prednisone3.9%75
9
Omeprazole3.6%70
10
Albuterol3.3%63
11
Cyclobenzaprine-hydrochloride3.2%62
12
Pantoprazole-sodium3.2%61
13
Ibuprofen3.1%59
14
Fluticasone3.0%58
15
Atorvastatin-calcium3.0%57

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports clomiphene side effects

60.7% of clomiphene adverse event reports involve female patients and 31.5% involve male patients. The largest age group is adult at 89%. These figures reflect who reports side effects, not underlying risk.

Sex

Female60.7%
Male31.5%
Unknown7.8%

Age group

< 26.5%
2–110.6%
12–170.4%
18–6488.6%
65+3.9%

What is clomiphene used for

Conditions and purposes for which patients were taking clomiphene when the adverse event was reported.

AmenorrhoeaAndrogen DeficiencyAndropauseAnovulatory CycleArtificial InseminationArtificial Insemination By PartnerAssisted FertilisationAssisted Reproductive TechnologyAsthenospermiaAtrophyAzoospermiaAndrogen DeficiencyAnovulatory CycleArtificial InseminationAssisted Fertilisation

Showing 15 of 123 indications

Clomiphene brand names and reporting trend

Clomiphene is sold under the brand name Milophene.

Brand names

Milophene1,068

Quarterly reports (20042025)

20052010201520202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking clomiphene with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.