slept 24/7 and was unable to get out of bed; getting tired and exhausted; weight loss/lost 10-15lbs; This is a spontaneous report from a contactable consumer or other non-healthcare professional. A 91-years-old male patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, Lot number was not reported), via an unspecified route of administration, administered in Arm Left on 05Feb2021 (age at the time of vaccination was 91 years) as DOSE 1, SINGLE for covid-19 immunisation at Hospital. Medical history included COPD from 2001 and ongoing. There were no concomitant medications and other Products. Historically, the patient received flu shot in Oct2020 and did not have any reactions to it. History of all previous immunization with the Pfizer vaccine considered as suspect and additional vaccines administered on same date of the pfizer suspect was reported as none. Prior Vaccinations (within 4 weeks) were reported as none. On an unspecified date in Feb2021, the patient experienced weight loss/lost 10-15lbs. On 07Feb2021, the patient experienced getting tired and exhausted. On 09Feb2021, the patient slept 24/7 and was unable to get out of bed. Reportedly, the adverse events were After the vaccine he was getting tired and exhausted, weight loss. It was reported that, the reporter was calling for her husband who has taken prednisone and albuterol yesterday (24Feb2021). He was scheduled for his second shot of the Pfizer BioNTech COVID-19 vaccine tomorrow (26Feb2021). The reporter wanted to know Pfizers recommendation if he should take the vaccine tomorrow as scheduled. The reporter mentioned that her husband's doctors do not know the answer. If no one has information, the reporter said her husband was most likely getting the vaccine as scheduled. He had adverse events from the first shot of the Pfizer COVID-19 vaccine. The reporter was speaking on behalf of her husband. He received the first dose of the Covid-19 vaccine on 05Feb2021. The day after, he had a reaction. He had been tired a few days before getting the vaccine. After the vaccine he was getting tired and exhausted. All of his vital signs were good. They checked with his primary care provider, pulmonologist and cardiologist. In the last two weeks her husband has lost 10-15lbs. On 11Feb2021, her husband went to the emergency room. His vital signs were good. Yesterday he went to the emergency room. They gave him Prednisone and Albuterol. He was flying high today. It was probably from the medicine. When the medication was gone, they will see. The second dose was due tomorrow. She was asking if he should get the vaccine. She had called his doctors at least twice. The doctor would not advise if he should take the vaccine or not. She enquired if they would give him the vaccine if he was taking Prednisone and Albuterol. She stated he was so exhausted that he slept 24/7. That was when she took him to the emergency room. She was unable to get him out of bed. She was only able to get him up to eat. He had a flu shot Oct2020. He did not have any reactions to it. Reportedly, he had X-rays, labs, CT scan, heart monitor and everything else. At the emergency room, her husband was prescribed Prednisone 20 mg 2 tablets daily and an Albuterol inhaler, 2 puffs, 4 times daily. The AE(s) did not require a visit to Physician Office but required as visit to Emergency Room for the events tired and exhausted and sleeping 24/7. Serious was reported as no. On an unspecified date, the patient underwent lab tests and procedures which included CT scan: unknown results, heart monitor: unknown results, vital signs: good, weight: 10-15 lbs (lost), x-rays: unknown results. Therapeutic measures were taken as a result of getting tired and exhausted and slept 24/7 and was unable to get out of bed which included prednisone 20 mg 2 tablets daily and an albuterol inhaler, 2 puffs, 4 times daily. The outcome of the event weight loss/lost 10-15lbs was unknown. The outcome of the event getting tired and exhausted was recovered on 25Feb2021. The outcome of the event slept 24/7 and was unable to get out of bed was recovered on 23Feb2021.  No follow-up attempts are possible; information about lot/batch number cannot be obtained.