Vertigo; She had crystals in ear 10 hours after getting the shot.; Then at 5am she got up to go to the bathroom and fell to ground; She could not stand and had to crawl to her cell phone after laying there; She could not stand and had to crawl to her cell phone after laying there; was throwing up violently; The caller states that her friend has gained weight.; eating too much; stressing; drinking too much; This is a spontaneous report from a contactable consumer (patient's friend). A 72-years-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, batch/lot number was not reported) via an unspecified route of administration, administered in arm on Feb2021 (at the age of 72-years-old) as DOSE 1, SINGLE for COVID-19 immunisation. The patient's medical history included breast cancer, she had this when she was young but was history now and little overweight. The patient's concomitant medications were not reported and no other products reported. No history of all previous immunization with the Pfizer vaccine. No additional vaccines administered on same date of the Pfizer suspect. No prior vaccinations (within 4 weeks). No adverse events following prior vaccinations. It was reported that, the caller, who was reporting for her friend regarding the Pfizer COVID vaccine and the first dose, for her best friend. It was explained that she received the first dose in Feb2021 and was in the hospital for intense vertigo for 4 days in Feb2021. Her friend never called to report the reaction and so she was calling today to try and help her friend to know what to do about a second shot. The patient wants to get the second shot but was terrified. She has question about getting the second dose in relation to her friend and the side effect. Her friend tried to call but gave up due to long hold times. It was stated that there was no explanation for the vertigo, they didn't find any reason for it other than she had crystals in ear 10 hours after getting the shot. The vertigo was lasted 6 weeks, the patient had to go by ambulance to the hospital. At 2:00 pm on a Thursday had injection, she went with sister-in-law. The caller spoke with her that night and she was good and happy that night that she did it. Then at 5 am she got up to go to the bathroom and fell to ground, she could not stand and had to crawl to her cell phone after laying there. The patient reported she had to call an ambulance and had to plead with them to take her because they were blaming it on the shot; she told them she was not ok and was throwing up violently. She was admitted to the hospital for 4 days. Afterward she went to doctor and was told the cause was whatever the crystal stones in her ear are. She couldn't leave house, couldn't drive and then 6 weeks it resolved and did not returned. Patient has no diabetes or high blood pressure, she was just a little overweight. It was stated that the patient does have allergies, but the caller does not know specifically what they are. She thought maybe she was given something and had a reaction, but she is not sure. The caller asks if Dilaudid was a medication. Callers ask who valid do we take the information she was reporting. Should she contact the CDC regarding this, who can help her get answers. The caller states that her friend has gained weight. When asked if this was after the first dose but she explains this has been during COVID, she was eating too much and stressing and drinking too much like everyone else (in 2021). The adverse events vertigo, foreign body in ear, fall, movement disorder, difficulty in standing and vomiting required emergency room and physician office visit. Reporter seriousness for vertigo was hospitalization. The outcome of drinking too much, eating too much, stressing and weight gain was unknown and the outcome of all other events was recovered on an unspecified date in 2021.     Information about lot/batch number has been requested.