delirious: incapable of sleeping, insomnia and inability to be awake and aware; high, over the top blood pressure; Sweating; on and off chills; she gets warm and cold, hot and cold; concerned about one kidney/ was dehydrated; affecting her kidney; incapable of sleeping, insomnia; she was weak; feeling like she would slip onto the floor; she is still not clear headed; she is woozy, like foggy; she is still not clear headed, she is woozy, like foggy; arm is still sore from second vaccine; This is a spontaneous report from a contactable consumer (patient). An 86-year-old female patient received the second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; lot number EL9262 expiry date 21May2021), via an unspecified route of administration on 12Feb2021 (at the age of 86 years old) at single dose in right arm for COVID-19 immunisation. Historical vaccine included first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; lot number EL8982) on 22Jan2021 at single dose in upper right arm and on 22Jan2021 experienced severe headache and arm hurting. Relevant medical history includes ongoing compromised immune system diagnosed many years ago, and ongoing one kidney functioning. The patient received no concomitant medications. On 13Feb2021 the patient experienced high, over the top blood pressure, delirious incapable of sleeping, insomnia and inability to be awake and aware which both required hospitalization from 13Feb2021 to 14Feb2021. It was also reported they were concerned about one kidney/ was dehydrated in 13Feb2021. On 13Feb2021 unspecified blood labs showed kidney was extremely dehydrated and Chest X-ray was good. Clinical course was reported as follows: she was just released from hospital yesterday, she took the second Pfizer COVID shot, on 12Feb2021, and became so very very ill, she expected some side effects, the first shot wasn't bad, the first all she had was a severe headache and arm hurting, but that was 3 weeks ago, and the second one she can't say how horrible it was: she had to get the paramedics there, she was very very ill. It was the worst night she has had, and she is 86 years old, and has had a multitude of serious issues but that shot was the worst. It was a combination of high blood pressure, over the top, and insomnia like she couldn't budge and open her eyes, she couldn't see anything but squares, it was like a horrible, if there is such a thing as a trip, a horrible trip, something she can't imagine wishing on anyone. The county administered it, she has several doctor, she initially provides her primary care doctor, for consent to contact, but says her nephrologist would be better, as she hasn't seen her primary care doctor in some time. Her primary care doctor doesn't know she had this, another doctor gave her permission, her nephrologist. States they were more concerned in the hospital about her kidney, she has one kidney functioning and, on mistake of the hospital, they didn't connect her to hydration, the night nurse didn't, and she was dehydrated and it was affecting her kidney. Her husband tried to call Saturday, when she had this reaction at like 06:30/07:00, but there was a huge long wait, he was calling to see about side effects, but they were beyond waiting, had to get the paramedics, her blood pressure was 178/113 and heart rate was 103. First shot was 3 weeks back. It looks like she had it on 22Jan2021, the headache and arm hurting started towards the evening, the shot was taken earlier in the day, and they started in the evening, her headache was quite severe, but with Tylenol it went away, the arm is still sore from the second vaccine, but is slightly better. Clarifies she was hospitalized for the blood pressure and delirium, like, it is best explained, like delirious: incapable of sleeping, insomnia and inability to be awake and aware, all she could see was, like if she talked about people who did LSD and trips, it was a bad trip, it was squares, she wanted to open her eyes, but could only see squares. She fell asleep Friday night about 11PM, and felt this at 04:00, and she pulled off her sleep apnea mask, she had to run to the restroom, she was weak, feeling like she would slip onto the floor, and had to get right in bed, and the insomnia continued until about 7AM, that was when she started to be able to focus on like words, she was able to say words in her mind, it was like a bad nightmare. She was admitted to the hospital, she was in the emergency room (ER), the paramedics took her there Saturday, about 07:30, took her to the hospital after immediate heart checking, an intravenous (IV) of some kind, and brought her to the hospital and she was in X-rays and what not, they did procedures in the ER, and they suggested her to be observed overnight, they watched her and things started to become more normal, but she is still not clear headed, she is woozy, like foggy. High, over the top blood pressure outcome: It has been back to a good blood pressure. Insomnia is ok- she slept ok last night. What is left: the night she woke up, so early Sunday morning, in the hospital, she was profusely sweating like someone came to her room and showered her bed with water, her sheets and blankets were soaked and this morning she woke, she got up, was still very woozy, and asked her husband to help get her out of bed, and she changed her nightgown and after an hour she got in the shower, as she was sweating again, not sweating, but occasionally on and off chills, she is taking off her nightshirt and putting on a bed jacket, she gets warm and cold, hot and cold. She had blood labs a chest X-ray, heart monitor the whole time until she was discharged, and everything was good except the kidney was extremely dehydrated. This was all on Saturday as well. On her first visit to get the vaccine, at that time, the facility was a big mall, and they handed her what to look for after the injection, and she didn't notice until this morning, it says if you have an immune system that is compromised, it could affect it, and she has immune system that is compromised diagnosed many years ago. Over the top blood pressure and insomnia had resolved, arm sore was resolving, dehydrated and affecting kidney had not resolved, final outcome of the remaining events was unknown.