Within an hour she had diarrhea/explosive diarrhea; Chills; She has the hiccups; This is a spontaneous report received from a contactable reporter(s) (Other HCP) from medical information team. The reporter is the patient.  A 64 year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 14Apr2021 10:30 (Lot number: ER8737) at the age of 64 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Stroke" (unspecified if ongoing), notes: about 10 years ago; "anxiety" (unspecified if ongoing), notes: after having stroke; "depression" (unspecified if ongoing), notes: after having stroke; "Severe indigestion" (unspecified if ongoing); "Burping all the time" (unspecified if ongoing); "Sleep" (unspecified if ongoing). Family history included: "Alzheimer's" (unspecified if ongoing), notes: Her mother had Alzheimer's and breast cancer and passed away; "breast cancer" (unspecified if ongoing), notes: Her mother had Alzheimer's and breast cancer and passed away. Concomitant medication(s) included: PAXIL [PIROXICAM] taken for anxiety, depression; TRAZODONE taken for sleep disorder; PRILOSEC [OMEPRAZOLE] taken for dyspepsia, eructation. Vaccination history included: Bnt162b2 (Lot: EP7534, first vaccine was in her left upper arm. It was a little bit sore last week still. Then it stopped hurting), administration date: 24Mar2021, when the patient was 64 years old, for COVID-19 immunization, reaction(s): "Left upper arm sore after first injection"; Flu vaccine (probably was about 4 months ago or something). The following information was reported: DIARRHOEA (non-serious) with onset 14Apr2021, outcome "unknown", described as "Within an hour she had diarrhea/explosive diarrhea"; CHILLS (non-serious) with onset 14Apr2021, outcome "recovered" (14Apr2021), described as "Chills"; HICCUPS (non-serious) with onset 14Apr2021, outcome "unknown", described as "She has the hiccups". Therapeutic measures were not taken as a result of diarrhoea, chills, hiccups.   Additional information: The patient received her second dose of the Pfizer BioNTech Covid19 vaccine around 10:30 today. Within an hour she had diarrhea. The diarrhea started 1 hour and 10 minutes after the second shot. The patient was not sure if it was still going on, she had diarrhea twice today. She was just laying down now. She was not dehydrated. Patient also later mentioned that she has the hiccups and she was an HCP but the job she provided was not clear, so she put her as non HCP.  The patient added that she also got wet when she got the second vaccine, and that might be she had the chills because it was raining. She was bundled up, but it was pouring down rain and was cold so that was probably part of the problem. Caller added this started after she got home. Caller added that it was not bad, there were no problems breathing or anything. She was not nauseated. She did not want anything else to eat, she was craving tacos so she got tacos but it was not settling with her to eat them. The patient has not taken anything as treatment medication, she added that her body said it needed to get something out of her like poison. The patient added that the arm soreness from the first vaccine pretty much has gone away but she was a side sleeper and she stayed off of it. In the middle of the night, she rolled over on it and said it was still sore so she got the second dose in her right arm. Patient had been on  Prilosec for over 10 years and tablet Trazodone 20 mg, caller corrected to 100 mg tablets and said she did not take a whole one/she would take a quarter of the pill. The caller would take a piece of it to see if she could get some sleep. She clarified she would take a quarter of the pill because she could not take a full one, it drugs her and if she does not get at least 8 hours of sleep, it would be in her system.    No follow-up attempts are possible. No further information is expected.