Received Sep 25, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| COVID19 | COVID19 (COVID19 (MODERNA MNEXSPIKE)) | MODERNA | UNK | — | IM |
pelvic pain; large golf ball size clots; abnormally heavy bleeding; I experienced severe headache; Started menstruating 2 days later than usual (Tuesday); This spontaneous case was reported by a consumer and describes the occurrence of PELVIC PAIN (pelvic pain), MENSTRUAL CLOTS (large golf ball size clots), MENSTRUATION DELAYED (Started menstruating 2 days later than usual (Tuesday)), HEAVY MENSTRUAL BLEEDING (abnormally heavy bleeding) and HEADACHE (I experienced severe headache) in a female patient of an unknown age who received mRNA-1273.251 (Spikevax LP.8.1 PFS) for COVID-19 prophylaxis. No Medical History information was reported. On 12-Sep-2025, the patient received dose of mRNA-1273.251 (Spikevax LP.8.1 PFS) (Intramuscular use) 1 dosage form. On 16-Sep-2025, after starting mRNA-1273.251 (Spikevax LP.8.1 PFS), the patient experienced MENSTRUATION DELAYED (Started menstruating 2 days later than usual (Tuesday)). On 17-Sep-2025, the patient experienced PELVIC PAIN (pelvic pain), MENSTRUAL CLOTS (large golf ball size clots), HEAVY MENSTRUAL BLEEDING (abnormally heavy bleeding) and HEADACHE (I experienced severe headache). The patient was treated with Ketorolac tromethamine (Toradol) at an unspecified dose and frequency. At the time of the report, PELVIC PAIN (pelvic pain), MENSTRUAL CLOTS (large golf ball size clots), MENSTRUATION DELAYED (Started menstruating 2 days later than usual (Tuesday)), HEAVY MENSTRUAL BLEEDING (abnormally heavy bleeding) and HEADACHE (I experienced severe headache) had resolved. No concomitant medications were provided. Patient received vaccine on 12-Sep-2025 (Friday morning). Patient started menstruating 2 days later than usual on 16-Sep-2025 (Tuesday and Wednesday). The patient experienced severe headache and pelvic pain, abnormally heavy bleeding and large golf ball size clots. Patient was sent to the emergency room by an urgent care doctor. Patient received IV fluids and Toradol. It was unknown if the patient experienced any additional symptoms/events.