Indigestion; some irregularity in bowel moments; change in color of the bowel; very drowsy had certain effect and I just can't keep my eyes open well enough.; Height less than it was the end of last year; I had a loss in weight; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  An 82-year-old male patient received bnt162b2 omi xbb.1.5 (COMIRNATY (2023-2024 FORMULA)), in 2023 as dose 1, single (Batch/Lot number: unknown) at the age of 82 years for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (DOSE NUMBER UNKNOWN, SINGLE, Batch/ Lot number not reported), administration date: Aug2022, when the patient was 81 years old, for COVID-19 immunization. The following information was reported: DYSPEPSIA (non-serious), outcome "unknown", described as "Indigestion"; BOWEL MOVEMENT IRREGULARITY (non-serious), outcome "unknown", described as "some irregularity in bowel moments"; FAECES DISCOLOURED (non-serious), outcome "unknown", described as "change in color of the bowel"; SOMNOLENCE (non-serious), outcome "unknown", described as "very drowsy had certain effect and I just can't keep my eyes open well enough."; BODY HEIGHT DECREASED (non-serious), outcome "unknown", described as "Height less than it was the end of last year"; WEIGHT DECREASED (non-serious), outcome "unknown", described as "I had a loss in weight". The events "indigestion", "some irregularity in bowel moments", "change in color of the bowel", "very drowsy had certain effect and i just can't keep my eyes open well enough.", "height less than it was the end of last year" and "i had a loss in weight" required physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of dyspepsia, bowel movement irregularity, faeces discoloured, somnolence, body height decreased, weight decreased.  Additional Information: Patient stated, "I just would like to report that side effect that I have the shot on the first of the month and it's now test of the month and I don't know if this could be case or not but I have had some indigestion and some irregularity in bowel moments and change in color of the bowel." When confirmed if side effects caused after Comirnaty shot: Consumer stated, "Yes and I also very drowsy had certain effect and I just can't keep my eyes open well enough." Regarding Height and Weight: patient stated, "My height is about 5 feet 9 and weight is about 120. Yes, that is less than it was the end of last year and I had a loss in weight and also I had just a whole change in me and then doctor can't find what is wrong with me." When enquired for vaccination card handy: Patient stated, "Done in first of the month. Yes, I do. All right the last time we don't have the records on the many more in united states but the last it was a year and half ago, let says that was in late Aug2022 and I was hospitalized because of this COVID." It was confirmed if Comirnaty shot was administered in Aug2022. Regarding Lot, Expiration, NDC and UPC:  Patient stated, "What is this you want again? LOT# well okay, don't see it all, on the back side of the card. I don't. I am already on the back side of the card, just a minute, XBB.1.5. A phone#? That's on the back side, just a minute here. There's several up here upper portion or lower portion or which portion? My vaccination card, that personal vaccination just a moment please. Okay, I am looking at the card it says reminder return to a second dose, is that right? Pfizer GH looks like 9694 and then the date is '24Aug2022' (as reported). Regarding Other Medical conditions or Concomitant medication: Patient stated, "No, I am not." Treatment: Patient stated, "Well, I have not had any since 01Nov." Any Prior vaccination: Patient stated, "No, as 01Nov was the first time I had the shots."  The information on the batch/lot number for bnt162b2 omi xbb.1.5 has been requested and will be submitted if and when received.