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Fluoxymesterone Side Effects

The most commonly reported side effects of fluoxymesterone include drug abuse, intentional product misuse, and autoimmune thyroiditis, based on 87 FDA adverse event reports from 2004 to 2023.

Fluoxymesterone side effects

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

1
Drug Abuse18.4%16
2
Intentional Product Misuse16.1%14
3
Autoimmune Thyroiditis10.3%9
4
Diabetes Mellitus10.3%9
5
Secondary Hypogonadism10.3%9
6
Multiple Organ Dysfunction Syndrome9.2%8
7
Hepatic Neoplasm9.2%8
8
Off Label Use8.0%7
9
Haematocrit Increased8.0%7
10
Performance Enhancing Product Use8.0%7
11
Intra-abdominal Haemorrhage8.0%7
12
Poisoning8.0%7
13
Glucose Tolerance Decreased6.9%6
14
Blood Glucose Increased6.9%6
15
Product Use In Unapproved Indication6.9%6

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

Report severity

86.2%Serious75 reports
58.6%Hospitalizations51 reports
23.0%Fatal20 reports

Seriousness is determined by the reporter, not by OpenClaim.

Fluoxymesterone drug interactions

Other drugs that appear in adverse event reports alongside fluoxymesterone. 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
Stanozolol33.3%29
2
Testosterone24.1%21
3
Somatropin18.4%16
4
Spironolactone18.4%16
5
Levothyroxine-sodium16.1%14
6
Anastrozole14.9%13
7
Aspirin11.5%10
8
Furosemide11.5%10
9
Cabergoline11.5%10
10
Liothyronine-sodium11.5%10
11
Pseudoephedrine10.3%9
12
Diazepam10.3%9
13
Dromostanolone-propionate9.2%8
14
Insulin8.0%7
15
Eculizumab8.0%7

Taken alongside

1
Aspirin11.5%10
2
Insulin10.3%9
3
Acetaminophen10.3%9
4
Prednisone10.3%9
5
Levothyroxine-sodium9.2%8
6
Anastrozole8.0%7
7
Spironolactone8.0%7
8
Stanozolol8.0%7
9
Hydrochlorothiazide6.9%6
10
Furosemide6.9%6
11
Paclitaxel6.9%6
12
Nandrolone6.9%6
13
Testosterone6.9%6
14
Verapamil-hydrochloride5.7%5
15
Celecoxib5.7%5

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 fluoxymesterone side effects

20.7% of fluoxymesterone adverse event reports involve female patients and 71.3% involve male patients. The largest age group is adult at 78%. These figures reflect who reports side effects, not underlying risk.

Sex

Female20.7%
Male71.3%
Unknown8.0%

Age group

< 20.0%
2–110.0%
12–170.0%
18–6477.6%
65+22.4%

What is fluoxymesterone used for

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

Aplastic AnaemiaBlood Testosterone DecreasedBreast CancerCancer Hormonal TherapyDrug AbuserDrug Use For Unknown IndicationHormone Replacement TherapyIntentional Product MisuseMedical Anabolic TherapyMuscle Building TherapyNeoplasm MalignantPancytopeniaParoxysmal Nocturnal HaemoglobinuriaPerformance Enhancing Product UseProduct Used For Unknown Indication

Showing 15 of 20 indications

Fluoxymesterone brand names and reporting trend

Fluoxymesterone is sold under the brand name Halotestin.

Brand names

Halotestin48

Quarterly reports (20042023)

20052010201520202023

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

Taking fluoxymesterone with another medication?

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