hasn't felt right; 2nd dose- had high temperatures to where he was sweating; felt like he was going to pass out/2nd dose- dizziness and a couple hours after that he almost fainted; dizzy/2nd dose- dizziness and a couple hours after that he almost fainted; had high temperatures; nauseous; tired; diarrhea; This is a spontaneous report from a contactable consumer.   A 47-year-old male consumer (patient himself) reported received second dose of COMIRNATY (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number-30130BA) via an unspecified route of administration, administered on 07Sep2021 as Dose 2, single (age at vaccination was 47-years-old) for covid-19 immunisation. The patient medical history little sore throat, tired ear ache, little cough. Patient concomitant medication not reported. Historical vaccine included first dose of COMIRNATY (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot number-FD8448) via an unspecified route of administration, administered on 17Aug2021 as Dose 1, single for covid-19 immunisation.  Since his 2nd dose, Ever since he had the COVID vaccine, starting on 08Sep2021, he was dizzy, felt like he was going to pass out, he had high temperatures, felt nauseous, tired, and he was also had diarrhea as well. Patient stated , "After the second shot, I ran 5 miles. I felt great. And the next morning, I had 0 symptoms. It was weird, I thought I would have some symptoms earlier, like 20-24 hours. He had the 1st dose at 5:00 at night and when he got home he felt tired and just went to bed right away. Normally he stays up later than just 6:00 to 7:00. When he woke up he was tired.  For these two weeks after the 1st dose he was tired, had a little sore throat, a little bit of an ear ache, a little cough and that was it with the 1st dose. Then when he woke up the next day he felt great and he started having the symptoms that afternoon of dizziness and a couple hours after that he almost fainted. He was dizzy that next night and then half of today he had still been dizzy. It had started to go away. He had the dizziness, he had high temperatures to where he was sweating, he was nauseous and he has had diarrhea. He confirms that his side effects after the 2nd dose began the next day, confirmed to 08Sep2021. He just didn't feel right and he thought that he just had the common cold after the 1st dose because it wasn't that bad but with the 2nd dose it ramped up on the following day about mid-day. He was 47-years-old and he had never felt dizzy and passed out in his entire life, which was a little odd. He confirms that he was still experiencing all of this side effects but they had improved some. When he got up this morning he figured he was going to be fine but he still felt dizzy. He was able to walk but he was a little dizzy and his high temperatures had went away. He was still having nausea and he still feels tired. It seems like from this morning he does feel better than how he did when he woke up around 6:00 to 7:00 this morning. He was hoping that it all goes away and he would feel normal tomorrow. Everywhere he reads it says that you may have 2 to 3 days of side effects, Inquired if he recovered completely from the side effects experienced after the 1st dose and he says yes. He had those for a week to a week and a half and he didn't feel good but he definitely could function. He felt a touch of something and it had went away and then he felt normal. Then he had the 2nd dose and the 2nd dose really felt worse than having COVID. He might of gotten dizzy when he had COVID but it was not every time that he stood up to where he couldn't walk. He would sit down and then get up and be dizzy to where he couldn't walk and that went on for about 5 to 6 hours. He has never experienced anything like that in his life. This has been the third day since the 2nd dose and he feels better today. The patient underwent lab test included body temperature was increased on 08-sep-2021.  The outcome of dizziness, diarrhea, nausea, high temperatures, sweating was not recovered. The outcome of event malaise, fatigue, loss of consciousness were unknown.