he was needing a little extra coffee because he was so tired during that 5 days; he was drinking like 3 cups of coffee daily; Suddenly he kind of went back to normal but felt very energetic; Felt tired for 5 days after the vaccine; Has had headaches; Stuffy nose; This is a spontaneous report from a contactable consumer (patient) via Medical information team. A 64-year-old male patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Lot Number: EL9261), via an unspecified route of administration, administered in right arm on 20Jan2021 at 14:00(at the age of 64-year-old) as 1st dose, single dose for Covid-19 immunization. The patient's medical history included Prediabetes from unknown date and was ongoing. The patient had diabetes-went diet, lost 60lbs- pretty much reversed it. Now in Prediabetes. A1C was going down point every month from 11 something, to 6.7,6.3. Lost 15lbs by skipping breakfast, 5 weeks later down 35 lbs pretty much held off; gained 15lbs had rash put him on steroids, got very serious about fasting, not cheating down 65lbs at about 60lbs down now. Got a little stuffy sometimes with allergies from unknown date and ongoing, allergies in the air, pollens and stuff; he thinks there's some foods; He did not want to get all the needles for allergy tests to check again; he had one when he was young but does not remember the results, his mom does not remember results; allergic to all this regular stuff that was unknown. The patient's medical history does not include diagnosed allergies, compromised immune status, respiratory illness, genetic / chromosomal abnormalities, endocrine abnormalities (including diabetes) and obesity. The patient's family history was reported as none. Past medications included: Pneumococcal vaccine a few months back. Prior vaccination the patient was little leery of vaccines because he had gotten a little sick from flu vaccine in the past for a day or two. The patient's concomitant medications included tamsulosin (TAMSULOSIN) 0.4mg extended released capsule taken once daily for prostatectomy, finasteride (FINASTERIDE) 5mg tablet one by mouth daily taken for prostatectomy, cyclobenzaprine (CYCLOBENZAPRINE) 10mg-prescribed was for 1, twice daily as needed usually takes 1 night for leg cramps previously. Now taking 5mg sometimes 1-2 5mg, daily. The patient's doctor just upped to 10mg which was his previous dose. Vaccination facility type was reported as hospital clinic. No additional vaccines were administered along with Covid vaccine on the same day. The patient was neither visited emergency room/visited physician office nor hospitalized. On 21Jan2021 kind of early that daytime, he experienced onset of feeling tired which continued for about 5 days; On 27Jan2021, he then suddenly he kind of went back to normal but felt very energetic. He also had onset of headaches which are ongoing-not sure which date (in Jan2021) these started other than toward the end of the 5 days of feeling tired. He was not sure if the headaches are due to a stuffy nose, or because he was needing a little extra coffee because he was so tired during that 5 days; he was drinking like 3 cups of coffee daily. The reporter stated that, he was going to see his mom and dad who are 93 years old; he did not want to end up doing anything to them, so he got vaccination. The reporter wants to know the expected immunity level following the first dose. The reporter wanted to know if the side effects from the second dose are expected to be the same or worse as the first. The outcome of the event tired was recovered on 26Jan2021, the outcome of headaches, stuffy nose was not recovered and unknown for rest of the events.  Follow-up (03Feb2021): This is a follow-up spontaneous report from a contactable consumer (patient) via Pfizer Sponsored program. Added patient's demographics, medical history, concurrent conditions, concomitant medication details, suspect drug details, events details, and reporter comments.  Follow-up (14May2021): Follow-up attempts completed. No further information expected.