reduced urine output; upper R flank; Proteinuria, Transient leucocyte esterase in urine; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 67 year-old female patient received bnt162b2 (BNT162B2), intramuscular, administered in deltoid left, administration date 30Mar2021 08:18 (Lot number: ER8732) at the age of 67 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Nocturnal Polyuria", start date: Jan2019 (ongoing); "OSteoporosis", start date: 2015 (unknown if ongoing). Concomitant medication(s) included: ELIQUIS taken for anticoagulant therapy, start date: 23Oct2020 (ongoing); DENOSUMAB taken for osteoporosis (ongoing). Vaccination history included: Covid-19 vaccine (Event verbatim: kidney stone , Onset date: 12-MAR-2021 00:00, Outcome: Recovering/Resolving, Lot: EN6204), administration date: 09Mar2021, for COVID-19 immunization, reaction(s): "kidney stone", "very tired", "severe pain", "reduced urine output". The following information was reported: URINE OUTPUT DECREASED (non-serious), outcome "unknown", described as "reduced urine output"; FLANK PAIN (non-serious), outcome "recovered", described as "upper R flank"; PROTEINURIA (non-serious), outcome "unknown", described as "Proteinuria, Transient leucocyte esterase in urine". The events "reduced urine output" and "upper r flank" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of urine output decreased, flank pain, proteinuria.  Additional Information: It was reported that upper right flank 10+ pain on 09Mar2021: 11.14 p.m. On 10Mar2021 to 12Mar2021, intermittent R/L flank discomfort. On 12Mar2021: supine (a.m.) 10+ pain 30 min upper right (interior posterior) flack (kidney area) Reported to PCP urine analysis ordered re kidney stone. On 15Mar2021: PCP was low. No kidney stone urine protein 1+ Ph 9.0 (H) suspect side effects result of Pfizer covid vaccine 09Mar20213 days earlier both findings described as potential adverse effects of this vaccine. On 16Mar2021: post 12Mar2021 eventually resolved. Federal urine output: 26Feb2021 to 08Mar2021: pre-vaccination Fluid balance total input: 56.82g, total output: 87.72g, diurnal output: 46.08g, natural output: 44.64g. On 09Mar2021 to 02Apr2021: Pfizer 1, 2: fluid balance: 23.80g/-9.38g, total input: 60.71g/3.35g, total output: 82.35g/ -7.37, diurnal output: 45.03/-79, natural output: 38.95/5.69g. Enclosures: 1: On 23Mar2021 patient fax to Pfizer safety reporting, 2 On 04Mar2021 and 30Mar2021 patient vaccination card (completed) CDC card. Reporter reports that After speaking with his P.C.P I reported what I am under impression were side effects related to the aforenoted on 18Mar2021 I reported theses AE to Pfizer representative at (number). She advised I would be receiving follow up regarding said. Since I have not received any follow up through, please be informed accordingly. On 10Mar2021 to 12Mar2021 Intermittent R/L upper flank Discomfort. On 12Mar2021 Supine (am0 10+ Pain, 30 Min, Upper right (internal Posterior Flank (Kidney area), 09Mar2021, 3day earlier Both finding described as potential adverse effect of this vaccine. On 14Mar2021 post 12Mar2021 eventually resolve  For reduction urine output 26Jan-8Mar2021 PRE Vaccination Fluid balance ..33.18, total 56.82oz/day total output 88.72, diornol output 46.08, nocturnal output 44.6 On 09Mar to 2Apr2021 Pfizer 1 and 2. Fluid balance 23.8oz/9.38oz T.I 60.71/+3.35oz to 82.35oz74, No 38,/56. It was reported that the patient is overall fine, the case is non serious because of that the follow-up activity are closed. Lab data include Basic Metabolic Profile, Normal range- (3.5-5.2) Result- K5.5, (Was not on any ACE-I oz ARB) Date 19Mar2021. Urinalysis On 12Mar2021 Result- (PH 9.0, Otherwise negative), On 19Mar2021 Result- (1 + Proteins otherwise negative), On 23Mar2021 Result- (1 + Proteins otherwise negative), On 27MAR2021 Result (1 + leukocyte esterase, otherwise negative), On 29Mar2021 Result- (1 + leukocyte, trace ketones, otherwise negative) 24-hour urine on 29Mar2021 Result- total volume is 2300ml, creatinine timed 782 osmolality timed 262, potassium random 30.9, potassium timed 71.1, sodium random 36 sodium timed 83 urea nitrogen random 386, urea nitrogen time 8878.  No follow-up attempts are possible. No further information is expected.