arm pain from first dose; headache from first dose; This is a spontaneous report received from contactable reporter(s) (Consumer or other non-HCP).  A 71-year-old male patient received bnt162b2 (BNT162B2), administered in arm right, administration date 18Mar2021 17:00 (Lot number: EP6955) at the age of 70 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "End stage renal disease" (ongoing), notes: Verbatim: End stage renal disease. The patient's concomitant medications were not reported. The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 18Mar2021, outcome "unknown", described as "arm pain from first dose"; HEADACHE (non-serious) with onset 18Mar2021, outcome "recovered" (19Mar2021), described as "headache from first dose". The events "arm pain from first dose" and "headache from first dose" were evaluated at the emergency room visit. Relevant laboratory tests and procedures are available in the appropriate section.  Additional Information: The reporter stated that he was diagnosed with end stage renal disease for 21 years and it might be a record. The patient calling in about the Pfizer COVID-19 vaccine. She stated that she was calling in regard to her husband. She wanted to report a severe adverse reaction to the second dose of the vaccine that her husband ended up in the emergency room and admitted to the hospital. She stated she had her shot at 4 pm and patient had his at 5 pm. She stated that everything was going good until Sunday at 3:29 am. She stated that her husband woke up shivering, quaking, and he was freaking out repeating oh my god, so she called 911. When the paramedics came, which were two young fellows by the names of (name) and (name), (name) stated to the reporter that her husband's reaction was a side effect of the vaccine. He had it and he got over it in 2 days. The reporter stated that she told the paramedic that you are 25 and her husband was 71 and was a kidney dialysis patient. She stated that when her husband found out that she couldn't get into the ambulance with her husband and ride to the hospital, so her husband refused to go to the hospital. She stated that her husband also felt nauseous and vomited in this period of time. She stated that he had no fever, though. She stated so fast forward to 8:30 am, and her husband was having difficulty breathing, and she called 911 again and this time they had 7 paramedics come out to the house. She stated that all of them were very nice. She stated they did an EKG because he stated that he had a soft pain in his left side of his chest. She stated that everything was cool with that, except his pulse rate was high. She stated that he also had low blood oxygen level.  She stated that they strapped in her husband in and drove him to the hospital to the ER. At the ER they discovered that potassium level increased, and she said that he had some extra fluid in his body. He was a dialyses patient, so they gave him dialysis on Sunday evening. He had calmed down at that point and they were constantly taking blood from him. She stated that she found out about the COVID vaccine was it has Potassium and phosphate as active ingredients, and her husband shouldn't have that.  She stated that her husband stayed in the hospital until Tuesday evening and was doing a lot better. She stated that she wanted to report this because it's important especially for dialysis patients in particular. The reporter stated he was shrinking; omg he is down to 5'5. The reporter stated that his Primary care doctor is Dr. (name) but he didn't know that her husband was hospitalized so she declines to give his information at this point because he was unaware. The reporter stated that they had to give him a tranquilizer because he was having a panic attack during this whole episode. She says that they gave him alprazolam. She stated that he didn't know exactly when the side effects went away because he didn't have a clock or a phone. She clarified that he vomited twice before going to the hospital but then he felt like like he had to vomit afterwards but he did not. She stated that his breathing problems didn't stop when paramedics came and gave him oxygen. She stated they made it to their house by 840 am, and he still had low oxygen level, they were still giving oxygen the whole time he was in the hospital, he was discharged on Tuesday 13Apr2021 at 7 pm and that's when he was taken off oxygen.  She stated that gave him dialysis on the 13Apr2021. She clarified the chest pain as he pointed to left side of his chest and the paramedics asked how the pain feel did was it hard or soft and he said soft, like it felt like gas. The reporter stated that he has completely recovered from all side effects. The reporter stated that the second dose was given on 10Apr2021. She confirmed it was the Pfizer BioNTech vaccine. She stated that the way the person wrote on the vaccine card made it very hard to read. She stated that the only thing she can get was at the end it looks like a 51. She stated seriously she didn't know what it said and nor does her husband. She stated that it could be BUR or BW for the second dose. She stated that maybe it's an EW#, or maybe it an FW#. She thinks it is EW#. The reporter confirmed that there was no doing information, expiration date, or NDC number on the vaccine card for either dose.  She stated that the person who wrote on the card has fancy handwriting, but she cannot read it, and that was not good.  She stated that the 1st dose lot number is EP given on 18Mar2021. She stated that his only side effects from the first dose was pain at the injection site, and he had a little headache. She stated that he always has a headache. She states that he gives her a headache. She stated that the headache went away 19 MAR 2021, but the arm pain lasted about a week. First one was around approximately 4 pm, and the second one was at 5 pm. Vaccine given on his right arm because of left arm has a dialysis fistula. The reporter's husband stated when he thinks about that feeling he had when the symptoms started, he still gets a little scared and nervous. No History of all previous immunization with the Pfizer vaccine considered as suspect. No Additional Vaccines Administered on Same Date of the Pfizer Suspect. No Prior Vaccinations (within 4 weeks). No AE(s) following prior vaccinations. Investigation Details: The reporter stated that they do not have any results from the tests they performed while in the ambulance and hospital. She states that he went to the. She states that he went to dialysis yesterday, and everything worked out okay.   No follow-up attempts are possible. No further information is expected.