I have a little more energy and that was really interesting; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) for a Pfizer sponsored program (005570). The reporter is the patient.  A 75 year-old patient received bnt162b2 (BNT162B2) (Batch/Lot number: unknown) at the age of 75 years as dose number unknown, single for covid-19 immunisation. Relevant medical history included: "epilepsy" (unspecified if ongoing), notes: had epilepsy, absent seizures. was prescribed to me a long time they can't take me off; "Brain injury" (unspecified if ongoing), notes: had 3 brain injuries, first one was caused by a drunk driver; "Allergies" (unspecified if ongoing), notes: I have a lot of chronic conditions,, Allergies.; "Asthma" (unspecified if ongoing), notes: I have a lot of chronic conditions,, Asthma.; "absent seizures" (unspecified if ongoing). The patient's concomitant medications were not reported. Past drug history included: D3 for osteopenia, notes: took D3 and calcium. My D3 level is high so that is a good thing; Calcium for osteopenia, notes: took D3 and calcium. My D3 level is high so that is a good thing. The following information was reported: ENERGY INCREASED (non-serious), outcome "unknown", described as "I have a little more energy and that was really interesting". Relevant laboratory tests and procedures are available in the appropriate section.  Additional Information: Patient called for assistance with Dilantin. Patient stated "I have epilepsy, absent seizures. I'm a senior and the medication that was prescribed to me a long time they can't take me off its been to long." Explained how medication was to expensive "I thought, I know I'm not suppose to, I thought I could try the generic and I know that but its not working. What the pharmacy is giving me is an orange pill and I think its phenytoin and you know but I'm not clear and I'm forgetting and I know that I need that pill, Dilantin." Patient stated wants to get back on Dilantin and knows the side effects "one of them the worst side effect I think is (inaudible) I was right on the line of osteopenia and healthy because what I do is take D3 and calcium and My D3 level is high so that is a good thing I think." Patient stated "I'm not myself I know that, without it. What this is doing is making me more irritable and frustrated. I do a lot of work to take care of myself and I wasn't like this before and than I can't think clearly and I'm forgetting this week. I've been on it a month so that should tell you. I knew right away. Why am I forgetting I never forgot. I had a photo graphic memory but now, I know I'm older but I still had it, it just doesn't go away in a day. I just notice a big difference. I asked the pharmacy but I think I need regular Dilantin." Patient shared "I have conditions that exacerbate this I think. I have 3 brain injuries and the first one was caused by a drunk driver and I think that is not helping either. I don't have seizures yet but I do notice, I have absent seizures, Yesterday when I was watching TV I missed a whole segment of something. I was watching the news...I must of had an absent seizure. When I start having that I start getting stressed because the possibility of having grand mal cause I've had those. So I think I need to go back on the Dilantin." Patient also shared "I have a lot of chronic conditions, Allergies, asthma its just all kind of..." Patient explained again "I don't feel myself." At end of call patient shared "I started on one and it just didn't work. The 3 I take work." Patient also shared on call "The Pfizer vaccine, for some reason it helped me with, I think I had something, I didn't have Covid But I knew I had something in my body and its gone and I think it was the vaccine. I have a little more energy and that was really interesting."  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.