sweat started pouring out; weak; felt like she was going to faint and fall down; This is a spontaneous report from a contactable consumer. A 84-year-old female patient received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot Number: EL9262), via an unspecified route of administration, administered in Arm Left on 27Jan2021 (age at vaccination) as DOSE 2, SINGLE for covid-19 immunisation. Medical history included ongoing Heart failure, Diagnosed a few years ago. A year to 2 years ago maybe, Artificial Heart valve, Said that it is called a TEVA Valve. Has had it about a year (ongoing). The patient concomitant medications were not reported. The patient previously received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot Number: EL3246), via an unspecified route of administration, administered in Arm Left on 06Jan2021 (at the age of 84-year-old) as DOSE 1, SINGLE for covid-19 immunisation and experienced she thinks she had no reaction to the first shot. On an unspecified date in 2021, the patient felt like she was going to faint and fall down. On Feb2021, sweat started pouring out, weak. Caller stated that 2 to 3 days after her second dose she was doing a puzzle and sweat started pouring out of her like she got rained on all of sudden. Caller states the sweating stopped and she got weak and felt like she was going to faint and fall down so she sat and let it pass. Caller asks if this has been reported. Caller states she is afraid to get a booster and doesn't want to go through that experience again with a third dose and asks if this is a contraindication to getting the vaccine. Caller stated she spoke with her doctor who stated it was probably just the vaccine kicking in. Caller stated she had no reaction to the first shot, and last year she had heart failure and a heart valve put in so now she do not know what to do. She said that she had a reaction 3 days after the second dose. She was afraid to have a 3rd booster dose if it is needed. Caller clarified that sweat came down that was pouring out of her like rain. She got so weak she had to sit there because she knew she would fall if she got up. She said that she just wanted to know if this has been reported. Caller said that her symptoms started and then they just stopped. Caller said that she got the vaccines about 6 months ago. Caller also said that she has a artificial heart valve. She asked her physician about her symptoms and he said that it probably means that it took. She said that she does not think that he knows though. Caller do not have the physician address or email to provide. She felt like it was raining on her, her hair was soaked, and her blouse was soaked. It was water dripping off of her. She said that this occurred the 2nd or 3rd day after her 2nd vaccination. She stated that it went away like 10 minutes afterward and she was fine. She said that she thought she would faint if she stood up and sat there for 15-20 minutes because she became so weak. She was doing a puzzle and it came on her like rain dripped off of her. It lasted a few minutes and then it stopped and she got so weak and could not stand up, but after that she was fine. She has not seen any reactions like that when she looked it up. Her doctor said that it was probably because the vaccine took. The clinical outcome of events felt like she was going to faint and fall down was recovered on an unspecified date in 2021, sweat started pouring out, weak were recovered on Feb2021.  Follow-up attempts are completed. No further information is expected.