MedDRA preferred term

Blood testosterone decreased: adverse event reports recording this term

6,811 reports to FDA record it, 2004–2026; 0% of the database.

Read first · FDA's statement on these data

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product. openFDA, FDA

FDA adds: "There is no certainty that the reported event (adverse event or medication error) was actually due to the product. FDA does not require that a causal relationship between a product and event be proven, and reports do not always contain enough detail to properly evaluate an event." The information in these reports "cannot be used to estimate the incidence of these events."

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

6,811
reports recording the term: 0% of all reports; 170
reports, 12 months to June 2026: 261 in the 12 months before; 30.6%
marked serious by the reporter: 57.4% across all reports; 1%
record death among outcomes, as reported: 9.1% across all reports

"Blood testosterone decreased" is a MedDRA preferred term recorded in 6,811 adverse event reports received by FDA, 0% of the database, from January 2004 to June 2026. The term is chosen by whoever codes the report to match what the reporter described.

170 reports recorded it in the 12 months to June 2026, down 35% from 261 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Of reports recording this term, 30.6% are marked serious, 1% include death among the outcomes and 8% include hospitalisation, as reported.

The drugs listed most often as suspect products in those reports are Androgel, Cialis and Axiron. That order mostly follows how many reports each drug has overall; the table also gives the term's share within each drug's own reports. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

Reports by month, five years

FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

Drugs listed as suspect products in these reports

Drug	Class	Reports with this term	Share of the drug's own reports
Androgel	—	1,660	9.5%
Cialis	Phosphodiesterase 5 inhibitor	621	4.1%
Axiron	—	583	9.2%
Propecia	5-alpha reductase inhibitor	293	6.8%
Testosterone	Androgen	214	3%
Finasteride	5-alpha reductase inhibitor	145	0.9%
Androgel 1%	—	117	20.1%
Viagra	Phosphodiesterase 5 inhibitor	102	0.4%
OxyContin	Opioid agonist	99	0.1%
Humira	—	91	0%
Revlimid	Thalidomide analog	86	0%
Oxycodone hydrochloride	Opioid agonist	85	0.1%
Androgel 1 62%	—	75	26.4%
Orgovyx	Gonadotropin releasing hormone receptor antagonist	71	0.3%
Testosterone cypionate	Androgen	71	2.3%
Proscar	5-alpha reductase inhibitor	63	3.7%
Aveed	Androgen	61	4.7%
Testim	Androgen	57	1.8%
Enbrel	Tumor necrosis factor blocker	54	0%
Xtandi	Androgen receptor inhibitor	50	0.1%
Testopel	Androgen	48	3.3%
Risperdal	Atypical antipsychotic	45	0.1%
Xyrem	Central nervous system depressant	44	0.1%
Androderm	—	43	1.6%
Suboxone	Opioid antagonist	42	0.2%

Drugs with a page on this site, ordered by the number of their reports recording this term. The last column is the term's share within that drug's own reports, against 0% across the whole database. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

By pharmacologic class

Class	Reports with this term	Share of class reports	Median drug in class
Phosphodiesterase 5 inhibitor	729	0.8%	0%
5-alpha reductase inhibitor	503	2%	0.9%
Androgen	486	2.4%	2.1%
Opioid agonist	477	0%	0%
Atypical antipsychotic	171	0%	0%
Thalidomide analog	92	0%	0%
Gonadotropin releasing hormone receptor antagonist	71	0.3%	0%
HMG-CoA reductase inhibitor	66	0%	0%
Tumor necrosis factor blocker	63	0%	0%
Androgen receptor inhibitor	61	0.1%	0.1%

Classes ordered by count. Class shares follow the class's overall report volume as much as anything else.

Patients in these reports

Patient age

Under 20%2

2 to 110.1%4

12 to 170.7%48

18 to 4412.1%822

45 to 6425.8%1,756

65 to 747.8%532

75 and over3.1%208

Age not given50.5%3,439

Patient sex

Female2.5%172

Male92.1%6,272

Not given5.4%367

Grey bar: all 20,646,523 reports in the database. 90.5% of these reports give the United States as the country.

Questions about "Blood testosterone decreased"

What does "Blood testosterone decreased" mean in an adverse event report?

It is a MedDRA preferred term, the dictionary FDA uses to code what a reporter described. The report's own description is not published by openFDA and is not shown here.

How many reports record blood testosterone decreased?

6,811 reports through June 2026 (0% of all reports), 170 of them in the latest 12 months.

Which drugs appear most often in these reports?

Androgel (1,660), Cialis (621), Axiron (583), Propecia (293) and Testosterone (214). Drugs with many reports overall lead almost every term's list. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Does a drug appearing here mean it was responsible for this reaction?

No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

I have this symptom. What should I do?

This site cannot assess anyone. A pharmacist or clinician can; for an emergency, call the local emergency number. Nothing on this page is medical advice.

Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. Terms are pooled across spelling and capitalisation variants of one MedDRA preferred term. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.