primary immunisation: non-pfizer vaccine; booster: comirnaty; primary immunisation: non-pfizer vaccine; booster: comirnaty; dizziness; headache; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp) from the regulatory agency (ra). the reporter is the patient. regulatory number: gb-mhra-webcovid-202202151536067270-me6ha (ra). other case identifier(s): gb-mhra-adr 26607744 (ra). a 54 year-old female patient received bnt162b2 (comirnaty), administration date 15jan2022 (batch/lot number: unknown) at the age of 54 years as dose 3 (booster), single for covid-19 immunisation. relevant medical history included: "fibromyalgia" (unspecified if ongoing); "stomach ache" (unspecified if ongoing); "chronic fatigue syndrome" (unspecified if ongoing); "pain" (unspecified if ongoing); "pain relief" (unspecified if ongoing); "anxiety" (unspecified if ongoing). concomitant medication(s) included: celecoxib taken for analgesic therapy, start date: 01jan2005; codeine taken for pain, start date: 01jan2012; diazepam taken for anxiety; hydroxychloroquine taken for chronic fatigue syndrome, start date: 01jan2010; omeprazole taken for abdominal pain upper, start date: 01jan2005; pregabalin mylan taken for fibromyalgia, start date: 20jan2012; sertraline taken for anxiety. vaccination history included: covid-19 vaccine (dose 2; manufacture unknown), for covid-19 immunisation; covid-19 vaccine (dose 1; manufacture unknown), for covid-19 immunisation. the following information was reported: off label use (disability), interchange of vaccine products (disability) all with onset 15jan2022, outcome "unknown" and all described as "primary immunisation: non-pfizer vaccine; booster: comirnaty"; dizziness (disability) with onset 15jan2022, outcome "not recovered", described as "dizziness"; headache (disability) with onset 15jan2022, outcome "not recovered", described as "headache". the patient underwent the following laboratory tests and procedures: sars-cov-2 test: no - negative covid-19 test. clinical course: patient had no symptoms associated with covid-19. reactive started approx. 15 mins after booster jab and she was still struggling with dizziness and headaches. patient had not tested positive for covid-19 since having the vaccine. patient was not enrolled in clinical trial. no follow-up attempts are possible; information about lot/batch number cannot be obtained. no further information is expected