Flu like symptoms; Weakness; Headache; Tiredness; just sleeping /. She slept it off for a couple of days./felt very sleepy; she could feel her heart racing; had a heavy feeling on her head; This is a spontaneous report from a contactable consumer (patient) or other non hcp.  A 78-year-old female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number and Expiration date were unknown), via an unspecified route of administration on 26Jan2021 10:00 (at the age of 78-years-old) as 1ST DOSE, SINGLE for covid-19 immunisation.  Medical history included asthma and chronic obstructive pulmonary disease from an unspecified date, diagnosed many years ago. Broken collarbone and Broken wrist on 28Dec2020. It was reported that she had three broken bones in her wrist, she can't lay in bed anyway, so she sleeps on the sofa, getting constipated on an unspecified date, The patient was allergic to Benadryl. It was also reported that she doesn't sleep too well, due to the sitting up in the chair business. concomitant medications were not reported. On 26Jan2021, 2-3 hours after, she felt very sleepy, had a heavy feeling on her head that was almost flu-ish but had no fever nor chills, and she felt that her heart was racing Influenza like illness, weakness, headache, and tiredness. She slept it off for a couple of days. She was enquired if she can still take the 2nd dose of the vaccine given these side effects. It was reported that she had her first dose of the shot on the 26th of Jan and thinks she had a reaction, though it was not enough to go to her doctor or anything, she was too weak. She said she didn't have chills, was not nauseous, had no fever, she feels like she had the flu, and. She said that she gets up and eats then goes back to sleep or does whatever else she had to do. she can't lay in bed anyway so she sleeps on the sofa. she did get up the next day and all the time had a headache. She says she doesn't take the flu shot because her older brother had a terrible reaction to that, none of her siblings take that shot, but she knows what it feels like to have a bad cold with your head heavy, that kind of feeling, she imagines that is what the flu feels like. The patient received treatment with Tylenol for headache. The patient underwent lab tests and procedures which included blood pressure (blood pressure measurement): 110/70 mmHg on an unspecified date, blood test: unknown on an unspecified date, Pulse (heart rate): pulse was ok on an unspecified date. Caller said that she was so surprised when she went to her doctor's appointment that her heart was racing, and she thought her blood pressure would be sky high, but the bottom number was 70 something, which is low for her, and the top number was 110, so it was perfect, which she doesn't usually have. She said that her pulse was ok and everything else was ok, and she had blood work taken that day but they didn't get those results back yet, so she doesn't know what they are. The outcome of the events was unknown.  Information on the lot/batch number has been requested.  Follow-up (13May2021): Follow-up attempts completed. No further information expected.