MedDRA preferred term

Intermenstrual bleeding: adverse event reports recording this term

5,085 reports to FDA record it, 2011–2026; 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.

5,085
reports recording the term: 0% of all reports; 1,411
reports, 12 months to June 2026: 1,107 in the 12 months before; 31.1%
marked serious by the reporter: 57.4% across all reports; 0.2%
record death among outcomes, as reported: 9.1% across all reports

5,085 reports in FDA's adverse event database record the MedDRA term "Intermenstrual bleeding": 0% of all reports received between August 2011 and June 2026. Coders pick the term that best matches the reporter's description.

1,411 reports recorded it in the 12 months to June 2026, up 27% from 1,107 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, 31.1% are marked serious, 0.2% include death among the outcomes and 6.4% include hospitalisation, as reported.

The drugs listed most often as suspect products in those reports are Slynd, ParaGard T 380A and Mirena. 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
Slynd	—	1,536	39.4%
ParaGard T 380A	Copper-containing intrauterine device	669	1.6%
Mirena	Progestin	242	0.2%
Nexplanon	Progestin	185	0.4%
Opill	—	181	14.1%
Myfembree	Gonadotropin releasing hormone receptor antagonist	118	8%
Twirla	Estrogen	106	10.5%
CombiPatch (estradiol/norethindrone acetate transdermal system)	Estrogen	74	2.1%
Liletta	Progestin	65	0.6%
Mounjaro	GLP-1 receptor agonist	63	0.1%
Estradiol	Estrogen	62	0.4%
Annovera	Estrogen	40	12%
Rituximab	CD20-directed cytolytic antibody	38	0%
Kyleena	Progestin	37	0.5%
Lo Loestrin Fe	—	35	2%
Hemlibra	—	34	0.3%
Levonorgestrel	Progestin	33	1.2%
Progesterone	Progesterone	33	0.6%
Etonogestrel	Progestin	31	1.5%
Orilissa	Gonadotropin releasing hormone receptor antagonist	30	0.9%
Dupixent	Interleukin-4 receptor alpha antagonist	29	0%
Humira	—	28	0%
Estradiol Transdermal System	Estrogen	27	0.5%
Oriahnn	—	26	4.4%
Ethinyl Estradiol Norelgestromin	—	25	0.7%

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
Copper-containing intrauterine device	669	1.5%	0.8%
Progestin	649	0.2%	0.1%
Estrogen	331	0.3%	0%
Gonadotropin releasing hormone receptor antagonist	150	0.5%	0.6%
GLP-1 receptor agonist	122	0%	0%
Corticosteroid	67	0%	0%
Serotonin reuptake inhibitor	63	0%	0%
CD20-directed cytolytic antibody	55	0%	0%
Nonsteroidal anti-inflammatory drug	41	0%	0%
Anti-epileptic agent	37	0%	0%

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%0

2 to 110.4%18

12 to 172.6%133

18 to 4427.2%1,385

45 to 647.2%368

65 to 740.4%20

75 and over0.6%31

Age not given61.6%3,130

Patient sex

Female62.6%3,182

Male0.4%18

Not given37.1%1,885

Grey bar: all 20,646,523 reports in the database. 83.3% of these reports give the United States as the country.

Questions about "Intermenstrual bleeding"

What does "Intermenstrual bleeding" 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 intermenstrual bleeding?

5,085 reports through June 2026 (0% of all reports), 1,411 of them in the latest 12 months.

Which drugs appear most often in these reports?

Slynd (1,536), ParaGard T 380A (669), Mirena (242), Nexplanon (185) and Opill (181). 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.