diarrhea; vomiting; nausea; headache; chills; Feverish; achiness; she had difficulty walking on her feet because of achiness; This is a spontaneous report received from contactable reporter(s) (Other HCP) from medical information team. The reporter is the patient.  A 61 year-old female patient received bnt162b2 (BNT162B2), administration date 01Apr2021 (Lot number: ER8733) at the age of 61 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "over the counter supplement" (unspecified if ongoing); "boost her immune system" (unspecified if ongoing). Concomitant medication(s) included: FISH OIL taken for supplementation therapy, start date: Jan2019; KYOLIC taken for immunisation, start date: Jan2019; VITAMIN D NOS taken for supplementation therapy, start date: Jan2019. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE, Batch/lot number: EN6199, Dosage text: first dose injected in her arm), administration date: 11Mar2021, when the patient was 62 years old, for COVID-19 Immunization, reaction(s): "increased heart rate", "Tingling". The following information was reported: PYREXIA (non-serious) with onset 01Apr2021, outcome "unknown", described as "Feverish"; PAIN (non-serious) with onset 01Apr2021, outcome "unknown", described as "achiness"; HEADACHE (non-serious) with onset 02Apr2021, outcome "unknown", described as "headache"; CHILLS (non-serious) with onset 01Apr2021, outcome "unknown", described as "chills"; VOMITING (non-serious) with onset 02Apr2021, outcome "unknown", described as "vomiting"; DIARRHOEA (non-serious) with onset 02Oct2021, outcome "unknown", described as "diarrhea"; GAIT DISTURBANCE (non-serious) with onset 01Apr2021, outcome "unknown", described as "she had difficulty walking on her feet because of achiness"; NAUSEA (non-serious) with onset 02Apr2021, outcome "unknown", described as "nausea". The events "feverish", "achiness", "headache", "chills", "vomiting", "diarrhea", "she had difficulty walking on her feet because of achiness" and "nausea" were evaluated at the emergency room visit. The patient underwent the following laboratory tests and procedures: body temperature: (01Apr2021) fever. Therapeutic measures were taken as a result of pyrexia, pain, headache, chills, vomiting, diarrhoea, gait disturbance, nausea.  Additional information: The patient concomitant medication Fish oil, Vitamin D and Multivitamin for over the counter supplement and Kyolic to boost her immune system. The patient was calling for a question regarding the booster dose of the Pfizer Biontech COVID19 vaccine. She stated she already received 2 doses of the vac-cine for over 6 months. The patient reported that on her first dose, she had no reaction and had a little bit in the beginning but immediately went away then for second dose of vaccine she had vomiting, diarrhea, and headache and had to go to an emergency care. Agent reports that the patient said she also had the usual aches, chills, and being feverish from second dose. Agent reports that patient was scheduled for booster dose. During joined call, caller asks transferring agent about how some people said you should not take Tylenol or Advil if you have a reaction if you want to have antibodies, and agent said it is ok to take some are allowed to take after vaccination, and referred caller to provider for information for treatment of side effects. The patient stated neither dose has NDC/EXP provided on the vaccine card. She said there was no treatment done, it was while she was still there at vaccination site, so they had her stay there for a little bit longer. The patient reported that two hours after her second dose in the evening she had general achiness, chills, and was probably a little feverish. She said she had difficulty walking on her feet because of achiness and by the next morning when she woke up she had headache, nausea, vomiting, and diarrhea. She said she couldn't keep anything down so she went to the urgent care and they gave her Toradol and probably Phenergan by injection. She reported that she thinks the Toradol was for headache or pain, she can't remember. She stated that there was no other treatment done and she was fine the next day. Toradol and Phenergan dosage unknown. She said that she would say her side effects were not serious. The patient said she is more concerned about going to get the booster, so she called to find out side effects of booster. She said she felt like she should be more prepared for side effects after the second dose it was kind of a doozy.  Follow-up attempts are completed. No further information is expected.