Had diarrhea all day that seemed to cure everything; Had little concentration; Nauseated/A little nauseous; Severe Headache/slight headache; Felt weak/Very weak; Fuzzy brained, foggy; Couldn't do anything and went back to bed.; Had chills and could not get warm; Really tired; Arm really sore, Left arm; Muscles weren't as sore; This is a spontaneous report received from a contactable reporter (Consumer). The reporter is the patient.  A female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), administered in arm left, administration date 23Mar2021 (Lot number: EN6208) as dose 1, single for COVID-19 immunisation. Relevant medical history included: "Rheumatoid Arthritis" (unspecified if ongoing); "Low thyroid" (unspecified if ongoing). Concomitant medications included: ARMOUR THYROID taken for hypothyroidism; PLAQUENIL [HYDROXYCHLOROQUINE PHOSPHATE] taken for rheumatoid arthritis; VITAMIN C [ASCORBIC ACID]. The following information was reported: FATIGUE (non-serious) with onset 23Mar2021, outcome "recovered" (Mar2021), described as "Really tired"; VACCINATION SITE PAIN (non-serious) with onset 23Mar2021, outcome "recovered" (Mar2021), described as "Arm really sore, Left arm"; NAUSEA (non-serious) with onset 24Mar2021, outcome "recovered" (Mar2021), described as "Nauseated/A little nauseous"; HEADACHE (non-serious) with onset 24Mar2021, outcome "recovered" (Mar2021), described as "Severe Headache/slight headache"; ASTHENIA (non-serious) with onset 24Mar2021, outcome "recovered" (Mar2021), described as "Felt weak/Very weak"; FEELING ABNORMAL (non-serious) with onset 24Mar2021, outcome "recovered" (Mar2021), described as "Fuzzy brained, foggy"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious) with onset 24Mar2021, outcome "recovered" (Mar2021), described as "Couldn't do anything and went back to bed."; CHILLS (non-serious) with onset 24Mar2021, outcome "recovered" (Mar2021), described as "Had chills and could not get warm"; DISTURBANCE IN ATTENTION (non-serious) with onset 26Mar2021, outcome "recovered" (Mar2021), described as "Had little concentration"; DIARRHOEA (non-serious) with onset 27Mar2021, outcome "recovered" (Mar2021), described as "Had diarrhea all day that seemed to cure everything"; MYALGIA (non-serious) with onset Mar2021, outcome "recovered" (Mar2021), described as "Muscles weren't as sore". Therapeutic measures were not taken as a result of fatigue, vaccination site pain, nausea, headache, asthenia, feeling abnormal, loss of personal independence in daily activities, chills, disturbance in attention, diarrhoea, myalgia. Additional information: Patient reported taking the vaccine because she did not want to spend the rest of her life in her home wearing a mask. If she lives through this social event, it will be a social benefit. They did not share the dose information with her.  Patient stated that nowhere was it said you can get the COVID by taking multivitamins. Patient declined to provide supplements. She also reported taking multivitamins as concomitant medication. She mentioned she was getting old and no other medical conditions. Patient has been taking Armour Thyroid for about 20 years, and started taking Plaquenil about 1.5-2 years ago. Patient reported that she had kind of a long and nasty reaction with the first vaccine. This was something she thought would happen on the second shot. She reported that it was pretty messy on her 2nd day (24Mar2021). On Thursday (25Mar2021), she felt a little better. On Friday (26Mar2021), she thought she was feeling a little better but had a little concentration, very weak and a little nauseous. She felt like herself on Sunday (28Mar2021), and stated she felt better back among the living. Patient was asking if it will get worse the second time she gets a vaccine. That was why she stated most people said the first shot wasn't bad at all, and why she was concerned about the 1st shot. Patient was also asking if she has to get the second dose within 3 weeks or if it can be extended out. Her side effects were better now, completely recovered from everything as far as she knows. Patient did not want to continue filling out the reports and stated she just wanted her questions answered.  No follow-up attempts are needed. No further information is expected.