Back pain was reported as worsened; he was about knocked off of his feet; muscle pain at his left-side back/His back is sore; arm hurt at first and still hurts a little bit.; had a hard time even walking and even staying stable on his feet; felt tired and fatigued; he slept for 18 hours; He said that he was not hungry at all; This is a spontaneous report from a contactable consumer or other non-health care professional (patient). A 80-years-old male patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Lot number: EL9266), via an unspecified route of administration (at the age of 80-years), administered in arm left on 16Feb2021 as dose 1, single for COVID-19 immunization. Medical history included cholesterol, blood pressure, covid-19 caller reported that he and his wife both had Covid-19 and he went to the hospital twice with it, but she had Covid and she had no effect and showed no effect at all, pain he has had the pain for probably 20 years on and off, but was amplified as of this morning and no medical history from an unknown date and unknown if ongoing.Concomitant medications included garlic [allium sativum] (GARLIC) taken as 1 tablet in the evening for cholesterol, metoprolol (METOPROLOL) taken as 50mg twice a day by mouth for blood pressure , atorvastatin calcium (ATORVASTATIN CALCIUM) taken as 40mg every 3rd day by mouth for cholesterol and vitamin supplement from an unspecified start date and ongoing.On an unspecified date in on Feb2021, the patient experienced he slept for 18 hours , felt tired and fatigued, he said that he was not hungry at all. On 16Feb2021, experienced muscle pain at his left-side back/his back is sore, arm hurt at first and still hurts a little bit, had a hard time even walking and even staying stable on his feet. On an unspecified date, experienced back pain was reported as worsened. On 17Feb2021, experienced he was about knocked off of his feet. It was further stated that yesterday (17Feb2021), caller stated that something knocked me off my feet and he slept for 18 hours. He was wondering if it was a normal reaction after the first dose of the Pfizer COVID-19 vaccine and how long would it last. He wanted to know if it will worsen with the second dose. He said it might be muscle pain at his left-side back (as said by his doctors). His back was sore and he was thinking the vaccine may have triggered it. He also said he felt tired and fatigued. He mentioned that he (80 yrs old) and his wife (78 yrs old) had COVID-19 and he developed worse adverse effects than her. He said he does not know if it is because of the medications she is taking. He said his wife has osteoporosis. He said that his wife did not get any ill effect from the COVID-19 shot. He stated that he did not take garlic pill yesterday. He was not sure if he took metoprolol on Wednesday morning because he was in his easy chair most of the day. In a pharmacy vial. He took atorvastatin calcium sometimes every 2nd day. Caller was a consumer that was calling about the Covid-19 Vaccine and reported that he got his his first shot on the 16Feb2021. He heard the first shot is minor and the second shot is suppose to give you problems. He said that yesterday he was about knocked off of his feet. He was in his easy chair about 18 hours out of 24 hours. He said that he slept 18 hours yesterday. His arm hurt at first and still hurts a little bit. He had a hard time even walking even staying stable on his feet. He heard that the shots were mixed up and some people got the second shot first was there any truth to that? Is that normal for a first shot to affect you in this manner? Is the second one is supposed to be worse? The funny part was he and his wife got the shot and she had no effect at all with it. She got the shot, but only had a little bit of a sore arm. He said that her arm hurt a little, but not a lot. The caller reported that he and his wife both had Covid and he went to the hospital twice with it, but she had Covid and she had no effect and showed no effect at all. He reported that his arm started hurting on Tuesday evening before he went to bed. He said that he does not sleep good and started feeling not stable on his feet when he would get up to go to the bathroom during the night. The caller said that him being unstable on his feet eased off as of yesterday evening 17Feb2021. He said that he was not hungry at all and his wife made him eat something and then he felt a little better. He had back pain and it's in a weird location up above his kidneys and that amplified and this morning was a lot worse. He said that he has had a CT scan and x-rays that showed nothing, but he thinks he needs a MRI. He said that it is like a knife is stuck in his back. He has had the pain for probably 20 years on and off, but was amplified as of this morning. He said that it has happened before like this, but seems to be sharper than usual. He said that he eased off some of his pills, but he was taking his blood pressure pill. Today he took a vitamin supplement. He takes a garlic pill for his cholesterol. He said that every 3rd day he takes a statin, but he has not taken any of that. The patient underwent lab tests and procedures which included computerised tomogram: showed nothing , x-ray: showed nothing on an unspecified date. The clinical outcome of the events he slept for 18 hours, felt tired and fatigued, Back pain was reported as worsened, He said that he was not hungry at all was reported as unknown for event muscle pain at his left-side back/His back is sore was reported as not recovered, for event arm hurt at first and still hurts a little bit, he was about knocked off of his feet was reported as recovering and for the event had a hard time even walking and even staying stable on his feet was reported as recovered on 17Feb2021.  No follow-up attempts are possible. No further information is expected