Ringing in my right ear; Patient adminstered dose1, dose2 and dose3 moderna vaccine and 4th dose was Pfizer vaccine; This is a spontaneous report received from a contactable reporter(s) (Physician). The reporter is the patient.  A 79-year-old male patient received BNT162b2 (BNT162B2), on 11Mar2022 as dose 4 (booster), single (Lot number: FK9895) at the age of 79 years for covid-19 immunisation. The patient's relevant medical history included: "Diabetes" (unspecified if ongoing), notes: Diabetes; "Glaucoma" (unspecified if ongoing), notes: Glaucoma; "Hypercholesteremia" (unspecified if ongoing), notes: Hypercholesteremia; "Gout" (unspecified if ongoing), notes: Gout; "hypothyroidism" (unspecified if ongoing), notes: Low thyroid. Concomitant medication(s) included: LATANOPROST; LIPITOR; ELIQUIS; COQ-10. Vaccination history included: Moderna covid-19 (The first one was 012L20A), for COVID-19 immunization; Moderna covid-19 (second one was 016M20A), for COVID-19 immunization; Moderna covid-19 (third (Booster) one was 017EZ1A), for COVID-19 immunization.  The following information was reported: TINNITUS (non-serious), outcome "unknown", described as "Ringing in my right ear"; INTERCHANGE OF VACCINE PRODUCTS (non-serious), outcome "unknown", described as "Patient administered dose1, dose2 and dose3 moderna vaccine and 4th dose was Pfizer vaccine". Therapeutic measures were not taken as a result of tinnitus.  Additional Information: Reporter said I had 3 Moderna and 6 months later, a Pfizer, fourth. Reporter stated, "So, I was calling to report tinnitus post vaccine." then said "I thought you would be interested in hearing about the another statistics. Tinnitus, ringing in my right ear.""It says FK9895. This was the second booster but I have got nothing. But I had 3 Moderna and 6 months later, a Pfizer, fourth."When confirmed for the previous doses of the Moderna COVID vaccine: Reporter stated, "And booster, Six months later a Pfizer. "Physician stated, "The first one was 012L20A and the second one was 016M20A. And the third (Booster) one was 017EZ1A. Reporter stated, "No vitamins, Thyroid medication (As the name of medication was not clarified hence not captured), Gout medication (As the name of medication was not clarified hence not captured)." Causality was yes. Reporter stated, "Perhaps a Flu shot, I don't remember (Later clarified by Physician that there was no Prior vaccination)."When confirmed it was Moderna COVID Vaccine: Reporter stated, "Until the Pfizer Booster. "Expiration Date (Moderna COVID Vaccine): Reporter stated, "No, they have no expiration date listed out." Prior vaccination (Within 4 weeks): Reporter stated, "I am not sure. I got the last Moderna in August and the Pfizer in March. Now, may be the answer is yes. We got the Flu shot in February of this year and I got the Pfizer on March 11. No, the answer is no. No previous Flu shot this year. "When paraphrased to clarify that there was nor prior vaccination: Reporter stated, "Correct. That's correct. No prior vaccinations within 4 weeks." ): Reporter stated, "No, they didn't write that down. No, I don't have it. I went to a Pharmacy, they gave me the shot.   No follow-up attempts are possible. No further information is expected.