felt faint like about to fall forward and the weird thing is it happens every time get the shot; woke up convulsing with chills; woke up convulsing with chills, cold; woke up convulsing with chills, cold, shaking; Headache; nauseous; dizzy; got sick again; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 54-year-old male patient received bnt162b2, bnt162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 01Oct2022 as dose 4 (booster), single (Lot number: GJ5342) at the age of 53 years for covid-19 immunisation. The patient's relevant medical history was not reported. Concomitant medication(s) included: LANTUS; HUMALOG. Vaccination history included: moderna vaccine (DOSE 1, SINGLE, Batch/Lot number: 011L20A), administration date: 06Jan2021, for COVID-19 immunisation, reaction(s): "I felt faint like I am about to fall forward and the weird thing is it happens every time I get the shot", "I woke up convulsing with chills", "I woke up convulsing with chills, cold", "I woke up convulsing with chills, cold, shaking", "nauseous", "dizzy", "I got sick", "Headache"; moderna vaccine (DOSE 2, SINGLE, Batch/Lot number: 939902), administration date: 07Sep2021, for COVID-19 immunisation, reaction(s): "dizzy", "Headache", "nauseous", "I woke up convulsing with chills, cold, shaking", "I woke up convulsing with chills, cold", "I woke up convulsing with chills", "I got sick", "I felt faint like I am about to fall forward and the weird thing is it happens every time I get the shot"; Bnt162b2 (DOSE 3 (BOOSTER), SINGLE), for COVID-19 immunisation, reaction(s): "woke up convulsing with chills", "dizzy", "Headache", "got sick again", "Moderna Vaccine: Date: 07Sep2021/04Feb2021 Name and Dose of Vaccine: Consumer stated, "It is the Pfizer."", "woke up convulsing with chills, cold", "nauseous", "felt faint like about to fall forward and the weird thing is it happens every time get the shot", "woke up convulsing with chills, cold, shaking". The following information was reported: SYNCOPE (medically significant), outcome "unknown", described as "felt faint like about to fall forward and the weird thing is it happens every time get the shot"; CHILLS (non-serious), outcome "unknown", described as "woke up convulsing with chills"; NASOPHARYNGITIS (non-serious), outcome "unknown", described as "woke up convulsing with chills, cold"; TREMOR (non-serious), outcome "unknown", described as "woke up convulsing with chills, cold, shaking"; HEADACHE (non-serious), outcome "unknown"; NAUSEA (non-serious), outcome "unknown", described as "nauseous"; DIZZINESS (non-serious), outcome "unknown", described as "dizzy"; ILLNESS (non-serious), outcome "unknown", described as "got sick again". The patient underwent the following laboratory tests and procedures: lab test: (Jul2023) unknown results. Therapeutic measures were taken as a result of syncope, chills, nasopharyngitis, tremor, headache, nausea, dizziness, illness. Clinical course: Consumer stated that after recent dose (Dose 5) 12 hours later around 3:15 in the morning he woke up convulsing with chills, cold, shaking. He had to use four blankets to warm up and then around at 7, he got hot and took it off and then around 07:30 got cold again and had been in bed all day covered with the three big heavy blankets and he was nauseous, had headache, was dizzy, felt faint like he was about to fall forward and the weird thing was it happened every time he got the shot, every time he got a COVID shot. The first two were Moderna (Moderna COVID-19 Vaccine) and for Pfizer he had the similar side effects, so the last three he took Pfizer because they were out of Moderna, they were doing one of the other so they said either one would work, it was okay to mix them and so the patient took it and got sick again. Patient was 54 and it started with the 53, 52, 51 four shots. Every time they put he had one. He was roughly 315 (Pounds).; Sender's Comments: Linked Report(s) : US-PFIZER INC-202300312081 Same patient/product, different dose (dose 5)/events.;US-PFIZER INC-202300312096 Same patient/product, different dose (dose 3)/events.;