Covid-19 vaccines: exacerbated menstrual irregularities recognized as a potential adverse effect

The National Agency for the Safety of Medicines (ANSM) presented its conclusions regarding menstrual disorders reported after vaccination with RNA messenger vaccine (eg Pfizer-BioNTech and Moderna vaccine).

Many women have already reported problems after vaccination. A monitoring committee has been set up at the national and European level. Since last July, the women concerned have had to report them using the pharmacovigilance guide.

More than 3400 cases

Between July and September 2022, 2,952 cases of menstrual irregularities have been reported with Comirnaty (Pfizer/BioNTech), and 515 with Spikevax (Moderna) vaccine.. The majority of these statements were made directly by patients. Some of the statements relate to very previous events, probably dating back to the spring of 2021. The menstrual disorders were declared mainly concern Changes in the duration and severity of bleeding, with or without pain. In addition, we note that these effects may persist in some patients over a period of up to about 6 months.

undesirable effect

Thus, the Pharmacovigilance Committee concluded on Friday, October 28, 2022 that heavy menstrual bleeding It could be considered a potential adverse effect of the Comirnaty and Spikevax vaccines. Reported cases are the most Often “not serious” and transient. Heavy menstrual bleeding will be added to summaries of product characteristics (SPC) and packaging leaflets for these two vaccines.

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“There is no indication that menstrual disorders that affect some people have any effect on reproduction or fertility.”However, he reassures the European Commission, as stated in the newspaper the scientist who determines “The available data confirm that the benefits of these vaccines far outweigh the risks.”

ANSM recommends that women with severe menstrual irregularities after vaccination against Covid-19 consult their doctor for additional examinations if necessary.