chills and shaky; chills and shaky; very sore arm; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 56 year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 31Mar2021 16:00 (Lot number: EP7533, Expiration Date: Jul2021) at the age of 56 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Tennis elbow" (unspecified if ongoing), notes: tennis elbow: Left Arm; "moderate carpal tunnel" (unspecified if ongoing), notes: Moderate carpal tunnel: both right and left; "Arthritis" (unspecified if ongoing), notes: arthritis in her shoulder. Concomitant medication(s) included: TYLENOL. Past drug history included: Flagyl, reaction(s): "Rash", notes: she had a rash and it was so many years ago probably 10 -15 years ago. Vaccination history included: Bnt162b2 (Dose: 1, Batch/lot number: EN6199 , Right arm, Expiry date: Jun2021), administration date: 11Mar2021, when the patient was 56 years old, for Covid-19 Immunization, reaction(s): "Sore Arm". The following information was reported: CHILLS (non-serious), TREMOR (non-serious) all with onset 01Apr2021 07:50, outcome "recovered" (01Apr2021 09:00) and all described as "chills and shaky"; PAIN IN EXTREMITY (non-serious) with onset 31Mar2021, outcome "not recovered", described as "very sore arm". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of chills, tremor, pain in extremity.  Additional details: Patient had chills and shakiness during the night that woke me up and it started about 7:50 AM and lasted to about 9 AM. Patient stated she stayed at the injection facility for 30 minute plus and had nothing. Patient stated the chills and shaking stopped at 9am. Patient experienced very sore arm immediately after she got the shot. Patient stated that she had no obvious fever and that her arm hurts now and wouldn't want to do anything and doesn't want to do anything. Patient stated is one medication from her doctor for arthritis in her shoulder but she doesn't take it regularly. Patient stated she took one of that, 2 days before getting the 2nd Covid vaccine and she takes it in the evening. Patient stated for both Covid vaccine doses she took Tylenol 500 mg, not like a couple days before and she also received Vitamins. Patient reported that the only difference between the 2 Covid vaccines is the 1 medication pills she took 2 night before. Patient stated she heard different things about taking things like Tylenol and when she asked nurses they said it's ok to take them more after and not to take them before and not to take anti-inflammatories like Aleve. Patient stated that she had the medication in her purse to take with her when she went to get the 2nd Covid vaccine as she had taken it a couple nights before and she told them at the site and they said it was ok to take and she is over cautious about taking medications. Caller reported the one she found in her purse is the one she takes twice a day and not the one she takes in the evening, that she had 2 medications, and the other one is as needed in the evening and she is not sure where it is and stated that this one in her purse she had not been taking, that she had only been taking Tylenol. Caller declines to provide further information as she was not taking this medication. Caller does not have the name of the medication she took 2 nights before the 2nd vaccine. Caller stated that she received one before bed as needed and was issued the prescription Dec2020. Caller does not have dose, NDC, lot or expiry date to provide. Patient received no other additional vaccines on the same date as of Pfizer suspect. The adverse events did not require emergency room or physician office visit. Patient stated no prior vaccines other than dose 1 received within 4 weeks and stated that she did not receive the flu shot, and she hasn't had one in over 10 years or more. Patient stated the shakiness alarmed her a little but she heard that other people had experienced chills. Patient reported that she had no difficulty breathing, no swelling in her face or throat, no fast heart beat, no bad rash, no dizziness or weakness or feeling like she is going to faint.  No follow-up attempts are needed. No further information is expected.