having lots of Gastrointestinal issues/have gastrointestinal stuff going on; up in the middle of the night; body aches/achy; chills (no fever); nausea; got the sore arm; diarrhea; This is a spontaneous report from a contactable consumer (patient). A 66-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: EN5318 (not clarified further)), via an unspecified route of administration on 03Feb2021 at single dose for COVID-19 immunisation and loratadine (CLARITIN), via an unspecified route of administration from 03Feb2021 at an unspecified dose for unspecified indication. Medical history included ongoing High cholesterol and Sleep disorder, both from unknown date. Concomitant medication included alprazolam (XANAX), calcium (CALCIUM), cyanocobalamin (VITAMIN B12), Multivitamin, taking a statin to prevent high cholesterol and L-methylfolate, stated it is like a folic acid drug. Because the patient really can't take anti-depressant she reacted to them all (Unspecified Medications), so that worked for her and helped her to keep up her spirit. The patient reported her side effects. She didn't want to interfere with anything but she was having lots of Gastrointestinal issues which were inconvenient. She was up in the middle of the night, happened not within 48 hour after the first dose of the Pfizer vaccine but around 60 hours after the vaccine, early this morning (06Feb2021) like around 2 am. The patient was having a reaction after the vaccine but they seemed to be like delayed reactions. Not anything with breathing, she had gastrointestinal stuff going on. The patient had chills, no fever, body aches and she was really going to the bathroom nonstop in the night. It seemed to have been like 2 days after she got the shot like they were worst yesterday (05Feb2021). And she experienced achy, chills, nausea, diarrhea and sore arm in Feb2021. She would like to take TYLENOL and IMODIUM and she didn't know what she could take because she didn't want anything to interfere with that as she had been reading a lot. The patient wanted information on IMODIUM to prevent diarrhea, TYLENOL for body aches, chills (no fever), and FLONASE for sinus. The patient did not receive any treatment for the events. The patient actually didn't even take, that morning that day when she was getting the shot, she called the pharmacist to see if she could spray her nose with the FLONASE for sinus and he told her that he didn't think it was a good idea and that maybe she should just take CLARITIN, so she did. But she took CLARITIN that morning (03Feb2021) and she was hoping that didn't interfere. She was just nervous about it as she didn't want that to interfere with the work that it was. The patient was still suffering, less, like she didn't have the diarrhea anymore. She still had a little achy. She did get the sore arm but only for one day, so it wasn't so bad. The action taken in response to the events for loratadine was unknown. The outcome of event diarrhea and got the sore arm was recovered on an unspecified date in Feb2021, of event achy was recovering, of other events was unknown.   Information on the lot/batch number has been requested.