he was injured after getting a second dose of Pfizer-BioNTech COVID-19 vaccine; sick for 10 days in bed with severe flu-like symptoms; sick for 10 days in bed with severe flu-like symptoms; stomach issues, stomach pain, hurting and started having reflux; couldn't eat a meal/ negatively impacted my ability to eat; lost about 20 pounds/ went from 180 lbs before the vaccination to 157labs as of today (08Dec2021); his ears started ringing real loud; Sinus infection; Nausea; Muscle spasm in stomach; Stomach discomfort; still I am not well.; reflux/stomach issues, stomach pain, hurting and started having reflux/ Bad indigestion, later diagnosed as GERDS; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team and product quality group for a Pfizer sponsored program. The reporter is the patient.  A 73 year-old male patient received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 14Feb2021 14:30 (Lot number: EN6200) at the age of 73 years as dose 2, 0.3 ml, single for COVID-19 immunization. Relevant medical history included: "Allergies" (ongoing); "Blood pressure" (unspecified if ongoing). Family history included: "High blood pressure" (ongoing); "Seasonal allergy" (unspecified if ongoing). Concomitant medication(s) included: LISINOPRIL taken for hypertension, start date: 2000 (ongoing); HCTZ taken for hypertension, start date: 2000 (ongoing); MONTELUKAST taken for hypersensitivity, start date: 2010 (ongoing); LISINOPRIL HCTZ taken for blood pressure abnormal, start date: 2000 (ongoing). Vaccination history included: Bnt162b2 (Dose 1, Single, Time: 13:30, lot-EL3247, Vaccine location: Left arm, Route: Intramuscular, Pfizer CVVAC0.3 ML/ BUD6HR@RT/ LotEL3247), administration date: 24Jan2021, when the patient was 73 years old, for COVID-19 immunization, reaction(s): "no side effects at first". The following information was reported: GASTROOESOPHAGEAL REFLUX DISEASE (non-serious) with onset 15Feb2021, outcome "not recovered", described as "reflux/stomach issues, stomach pain, hurting and started having reflux/ Bad indigestion, later diagnosed as GERDS"; ILLNESS (non-serious) with onset 15Feb2021 02:00, outcome "recovered" (25Feb2021 02:00), INFLUENZA LIKE ILLNESS (non-serious) with onset 15Feb2021, outcome "recovered" (Feb2021) and all described as "sick for 10 days in bed with severe flu-like symptoms"; ABDOMINAL PAIN UPPER (non-serious) with onset 15Feb2021, outcome "not recovered", described as "stomach issues, stomach pain, hurting and started having reflux"; EATING DISORDER (non-serious) with onset 15Feb2021, outcome "recovering", described as "couldn't eat a meal/ negatively impacted my ability to eat"; WEIGHT DECREASED (non-serious) with onset 15Feb2021, outcome "unknown", described as "lost about 20 pounds/ went from 180 lbs before the vaccination to 157labs as of today (08Dec2021)"; TINNITUS (non-serious) with onset 15Feb2021, outcome "not recovered", described as "his ears started ringing real loud"; SINUSITIS (non-serious) with onset 15Feb2021, outcome "recovered" (Mar2021), described as "Sinus infection"; NAUSEA (non-serious) with onset 15Feb2021, outcome "not recovered", described as "Nausea"; MUSCLE SPASMS (non-serious) with onset 15Feb2021, outcome "recovering", described as "Muscle spasm in stomach"; ABDOMINAL DISCOMFORT (non-serious) with onset 15Feb2021, outcome "not recovered", described as "Stomach discomfort"; MALAISE (non-serious) with onset 15Feb2021, outcome "not recovered", described as "still I am not well."; INJURY (non-serious), outcome "unknown", described as "he was injured after getting a second dose of Pfizer-BioNTech COVID-19 vaccine". The events "reflux/stomach issues, stomach pain, hurting and started having reflux/ bad indigestion, later diagnosed as gerds", "sick for 10 days in bed with severe flu-like symptoms", "sick for 10 days in bed with severe flu-like symptoms", "stomach issues, stomach pain, hurting and started having reflux", "couldn't eat a meal/ negatively impacted my ability to eat", "lost about 20 pounds/ went from 180 lbs before the vaccination to 157labs as of today (08dec2021)", "his ears started ringing real loud", "sinus infection", "nausea", "muscle spasm in stomach" and "stomach discomfort" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of gastrooesophageal reflux disease, illness, influenza like illness, abdominal pain upper, eating disorder, weight decreased, tinnitus, sinusitis, nausea, muscle spasms, abdominal discomfort.  Additional Information: Pfizer-BioNTech COVID-19 vaccine a Pfizer product. Vaccine Administered at a Facility: no   No follow-up attempts are possible. No further information is expected.