Confused; Disorientated; Sleeping a lot/Groggy; Headache; Felt very weak, felt very tired; felt very panicky; Dizziness; Felt like she had the flu; Chills; pain in her neck; she was cold; This is a spontaneous report from a contactable consumer (patient).  This 89-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Lot number PFREL1283, Expiration Date 30Apr2021), via intramuscular, on 15Jan2021 (at 12:00) at a single dose on the left arm for COVID-19 immunisation. Relevant medical history included ongoing lymphoedema (she gets water in her legs), ongoing severe arthritis of both knee caps (she had a cortisone shot and lidocaine in her knees), and dust allergy. Historical vaccine included flu vaccine received in Jan2020 and in Oct2020 (with terrible reaction: pain in arm, numb in arm and muscle pain arm for 6 weeks). Past drug history included allergy to lidocaine (her face swelled up), and hydrocortisone (CORTISONE). She was in a wheelchair. Surgical history included 2 hip replacements. Relevant concomitant medications included drug for lymphoedema. The patient stated she started having side effects almost immediately after receiving the COVID-19 vaccine. She felt very panicky, felt very weak, felt very tired. She had like a headache. Some of the symptoms started the day she got the shot and then more symptoms arose the day after. She was very tired and was sleeping a lot the next day. She felt very like groggy. In fact, she was so groggy, she pressed the wrong button in her chair. She clarified she has lymphedema and she has to be in a lift chair to keep her legs elevated. When she needs to get up, she presses a certain button to raise and lift the chair into a sitting position. However, that day, her doorbell rang (her meals are delivered to her) and she was so groggy and confused, that she pressed the button that put her straight out into a lying position instead of a sitting position. She ended up sliding off the chair and onto the floor. She had to call for assistance (there is an emergency button she can press). She had to be lifted off the floor. She explained to them she didn't end up on the floor from walking, she slid off the chair. She was so disoriented she pressed the wrong button. She felt like she had the flu, she was cold, she had the chills. She was laying down, covered up with 2 blankets. She couldn't move. It was terrible. At the time, she slid off the chair, she had to go the bathroom. She is on a water pill which makes things worse, but she has a bedside commode close to her lift chair. When she was trying to get off the chair go to the bathroom (which is only 4 or 5 steps away from the commode), she was so disoriented, she pressed the wrong button. She has had this chair for 5 years.  She slid off the chair and ended up hitting the floor with her rear end. She remained on the nice cold floor (its a ceramic tile floor) until they came to pick her up. She mentioned she has had 2 hip replacements and once she is on the floor, she can't get up. Once assistance from where she lives came to pick her up, she was asked if she need to go the hospital or call ambulance. She explained to them she didn't fall. She slid off the chair. She is a very active person. Although she is almost 90, year is not senile. She slid off the chair, she didn't fall. The patient stated that she got the flu shot this past October and had a terrible reaction to that, too. Therefore, she doesn't know if it's just her system. She has had a flu shot every single year for the past 10-15 years and she has never had a reaction at all. She received the regular flu shot at her doctor's office in Oct2020 had a terrible reaction, she had severe pain in her arm where they gave her the shot, the pain wasn't at the injection site, the shot was high up the arm, her arm was numb and she couldn't raise it; she had muscle problems with the arm, she had trouble with her arm for 6 weeks. She has been taking naproxen sodium (ALEVE) for the headache. She has just been treating it symptomatically. No fever and she has just felt cold. The patient stated she really is not sick. She went to pick up dog medicine from the vet and when she leaves her facility, her temperature is always checked when she comes back. She was told her temperature was 97 something. So, she wasn't running any temperature prior to the vaccine. The patient was planned for the second dose on 05Feb2021. The patient stated her symptoms are not so severe it affects her breathing or something serious. It's just a pain in her neck to walk around with a headache. The outcome of the events was unknown.