it gave me a fibro flare-up; worsening of my fibromyalgia; extreme fatigue; muscle pain; Headache; just feeling lousy; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) for a Pfizer sponsored program. The reporter is the patient.  A 66 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 31Aug2021 (Lot number: FC3182) at the age of 65 years as dose 2, single for covid-19 immunization. Relevant medical history included: "Fibromyalgia" (unspecified if ongoing); "Osteoporosis" (unspecified if ongoing); "Chronic fatigue syndrome" (unspecified if ongoing). Concomitant medication(s) included: AMITRIPTYLINE; CLONAZEPAM; METOPROLOL; NABUMETONE. Vaccination history included: Bnt162b2 (DOSE: 1, LOT #: FA6780, Anatomical site of vaccination: Left arm), for COVID-19 immunization, reaction(s): "had some minor side effects after the first dose". The following information was reported: FIBROMYALGIA (non-serious) with onset 2021, outcome "recovering", described as "it gave me a fibro flare-up; worsening of my fibromyalgia"; FATIGUE (non-serious) with onset 2021, outcome "recovering", described as "extreme fatigue"; MYALGIA (non-serious) with onset 2021, outcome "recovering", described as "muscle pain"; HEADACHE (non-serious) with onset 2021, outcome "recovering", described as "Headache"; FEELING ABNORMAL (non-serious) with onset 2021, outcome "recovering", described as "just feeling lousy".  Additional Context: Call was transferred from (withheld) by (Name) Transferring agent stated, "We have a caller on the other line her name is (Name). So in regards this (Name) mentioned that, after getting her second dose from Pfizer, she had some side effects so in regards with this she is also planning to have her booster shot. So, we are reporting a side effect that she got after getting the second dose."When paraphrased the concern: Consumer stated, " Yes." When probed for the side effects: Consumer stated, " Well, it lasted for seven days after the second shot. I have fibromyalgia, so that does not help, it gave me a fibro flare-up, extreme fatigue, muscle pain and fatigue, headache, just feeling lousy. So, for 7 days I just laid around, you know instead, eventually this has to get better, it did. It started after the 7 days, I start to feel some relief. I had some minor side effects after the first dose (further clarifcation unknown hence event captured as per verbatim) but the second was the one that really put me down for 7 days and I think a part of it is due just because I have fibromyalgia so that will tend to flare-up (further clarification unknown) when any new thing is introduced in to my body but you know I go for my booster February second. That will be the 5 months, because I know your policy is they are saying 5 months rather than 6 months, so and I will take the booster and you know we will see if I am down for 7 days or not, I just do not know but (Incomplete sentence), so that kind of what I have experienced, it was the worsening of my fibromyalgia, muscle ache, headache, extreme fatigue and then as I said after 7 days it slowly just got better."When asked for permission to file a safety report: Consumer stated, "Sure, so what does that mean then, when you file that because you know I am going continue to get the Pfizer booster, you know I put up with the side effects but (incomplete sentence)."Consumer was informed about the role of Pfizer Drug Safety department. Reporter type: Consumer stated, "Nope, I am just a regular person."When probed if the consumer called Pfizer drug safety for the first time: Consumer stated, "No, I reported it to my doctor, the side effects that I had after the second shot cause I think they have to then send that information cause they keep doing stuff like that. So, but I have, first time calling Pfizer itself." (Further clarifications unknown hence captured as initial report) Height and Weight: Consumer stated, " I am about 5 (feet) 5 and a half (inches) tall and weight is probably about 125 (pounds)." (Further clarifications unknown hence not captured in tab)  Follow-Up (19Jan2022): Follow-up attempts are completed. No further information is expected.  No follow-up attempts are possible. No further information is expected.