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Ospemifene Side Effects

The most commonly reported side effects of ospemifene include off label use, hot flush, and headache, based on 2,609 FDA adverse event reports from 2009 to 2025. 3.6% of reports found the drug to be ineffective.

Ospemifene side effects

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

1
Off Label Use17.4%454
2
Hot Flush14.3%374
3
Headache8.0%210
4
Muscle Spasms7.4%194
5
No Adverse Event6.6%173
6
Vaginal Haemorrhage5.7%150
7
Vaginal Discharge5.1%134
8
Labelled Drug-drug Interaction Medication Error4.3%111
9
Nausea4.2%110
10
Hyperhidrosis4.1%107
11
Drug Ineffective3.6%93
12
Rash3.3%87
13
Fatigue3.3%86
14
Pain In Extremity3.0%77
15
Therapeutic Response Unexpected2.9%75

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

Report severity

18.3%Serious477 reports
4.5%Hospitalizations117 reports
0.2%Fatal4 reports

Seriousness is determined by the reporter, not by OpenClaim.

Ospemifene drug interactions

Other drugs that appear in adverse event reports alongside ospemifene. 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
Sodium-oxybate1.2%31
2
Adalimumab1.0%25
3
Estradiol0.8%20
4
Etanercept0.5%13
5
Estrogens0.3%9
6
Apremilast0.3%9
7
Pregabalin0.3%9
8
Lenalidomide0.3%9
9
Mirabegron0.3%8
10
Dupilumab0.3%8
11
Tofacitinib0.3%7
12
Bupropion0.2%6
13
Gabapentin0.2%6
14
Dalfampridine0.2%6
15
Teriflunomide0.2%4

Taken alongside

1
Levothyroxine-sodium9.9%258
2
Ergocalciferol7.3%190
3
Estradiol5.7%148
4
Omeprazole4.6%119
5
Calcium4.5%118
6
Aspirin3.5%91
7
Gabapentin3.4%89
8
Atorvastatin-calcium3.4%88
9
Acetaminophen3.2%83
10
Fluticasone3.0%77
11
Lisinopril2.9%76
12
Alprazolam2.7%71
13
Fish2.5%65
14
Estrogens2.5%64
15
Simvastatin2.4%63

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 ospemifene side effects

94.6% of ospemifene adverse event reports involve female patients and 0.3% involve male patients. The largest age group is adult at 67%. These figures reflect who reports side effects, not underlying risk.

Sex

Female94.6%
Male0.3%
Unknown5.1%

Age group

< 20.0%
2–110.0%
12–170.0%
18–6467.4%
65+32.6%

What is ospemifene used for

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

Accidental Exposure To ProductAmnesiaArtificial MenopauseAtrophic VulvovaginitisAtrophyAtrophic VulvovaginitisAtrophyBladder DiscomfortBladder DisorderBladder DysfunctionBladder OperationBladder PainBladder ProlapseBladder SpasmBlood Disorder

Showing 15 of 128 indications

Ospemifene brand names and reporting trend

Ospemifene is sold under the brand name Ospemifene.

Brand names

Ospemifene33

Quarterly reports (20092025)

20092016202020242025

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

Taking ospemifene with another medication?

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