Dizzy; I didn't have a balance; Felt lethargic like sleepy and took a short nap that was late in the afternoon.; Felt lethargic like sleepy and took a short nap that was late in the afternoon.; she feel nauseous; she threw up and  came back and  recline her sofa and lay down and try to get up from the seat; Leg cramps like in the side of my legs from the knees, both knees, Had severe leg cramps, it went up to my shoulders; High pulse rate,Rapid heartbeat; Had severe leg cramps, it went up to my shoulders and I felt like my chest was tight and had very high pulse,rapid heartbeat.; Couldn't stand up; Problem with breathing; This is a spontaneous report from a contactable consumer (patient). This is the first case out of the 2 cases. A 65-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot number: FA6780), dose 2 via an unspecified route of administration on 16Jul2021 at 06:00 PM as a single dose for (at the age of-65 year) COVID-19 immunisation. Medical history included ongoing stomach cancer, ongoing Type 2 diabetes, and ongoing BP/blood pressure. Concomitant medication(s) included isosorbide '3' mg (Not appropriately clarified hence dose was not captured in tab), omeprazole, 80 mg taken for stomach cancer (take total 80 mg); sertraline taken for blood pressure; propranolol, 40 mg; insulin (43 Units Insulin, the pen) taken for diabetes (at bed time in the night); vitamin d3, 5 Units. The Oncologist put me on (incomprehensive voice) 5 Units, IU of Vitamin 'D3'." Historical vaccine included BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot number: FA6780), dose 1 via an unspecified route of administration on 25Jun2021 (at the age of-65 year) as a single dose for COVID-19 immunisation. She didn't have any side effect from the first shot. No other vaccine prior to 4 weeks of COVID Vaccine. On 16Jul2021 patient had the shaky experience few minutes ago because like she said after she walks from the pharmacy they kept her for few minutes under the observation and when she got up from the seat she felt dizzy, like she didn't have a balance, when she came home she felt lethargic like sleepy and took a short nap that was late in the afternoon (probably 5 in the afternoon), then she felt nauseous, she threw up and came back and reclined in sofa and lay down and she tried to get up from the seat and she had leg cramps like in the side of legs from the knees, both knees. She had severe leg cramps, it went up to shoulders and felt like her chest was tight and had very high pulse, rapid heartbeat and her husband was in the bedroom and he came and thought that (incomplete sentence). So she couldn't stand up and her husband brought the spray Biofreeze (Treatment). She felt dizziness and took up little aspirin (treatment) and now she was having some relief. She still has a little problem with breathing. Patient was advised to reach out to nearest Emergency room in case of any medical emergency. She was am disabled. (Further not clarified if consumer was financially or physically disabled, hence not captured in tab). She is a cancer patient but on 'remission' so she does not take any treatment anymore and 'radiation therapy'. Now just the doctors, the oncologist was observing her. She had Laboratory test in the three months, couple days ago. She meet her oncologist. It was 15 days ago. Yesterday's two week back." (Further clarification was unknown). She was just wondering what to do in case she has the leg cramps. The outcome of events was unknown.  No follow-up attempts are completed. No further information is expected.