didn't feel very well afterwards; Tired/He was mostly tired; Slept the whole day on Friday; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team.  A 78 year-old male patient received bnt162b2 (BNT162B2), administered in arm right, administration date 19Aug2021 10:30 (Lot number: FD8448) at the age of 78 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "breast cancer" (unspecified if ongoing), notes: He  is taking Ibrance and that his cancer markers went from 368 to 178 from Feb 2020 to Jun 2021. They dropped 190 points.; "removed a lymph node" (unspecified if ongoing). Concomitant medication(s) included: IBRANCE taken for breast cancer (ongoing). Vaccination history included: Bnt162b2 (First Dose, lot number: FAC780, anatomical lotion: right arm, time: 1030 am.), administration date: 30Jul2021, when the patient was 78 years old, for Covid-19 Immunization, reaction(s): "chills", "fever". The following information was reported: MALAISE (non-serious) with onset 20Aug2021, outcome "unknown", described as "didn't feel very well afterwards"; FATIGUE (non-serious) with onset 20Aug2021, outcome "recovered" (Aug2021), described as "Tired/He was mostly tired"; HYPERSOMNIA (non-serious) with onset 20Aug2021, outcome "unknown", described as "Slept the whole day on Friday". Relevant laboratory tests and procedures are available in the appropriate section. Additional information: The patient's wife was on the line reporting for her and her husband. Her and her husband got the vaccine on 19Aug2021. They both didn't feel well over the weekend. She called about booster dose questions. Her husband is 78. She also shared with her that he was taking Ibrance and that his cancer markers went from 368 to 178 from Feb2020 to Jun2021. They dropped 190 points. On Thursday, he got the second vaccine right after she did. Friday he was just tired. He was mostly tired. He slept the whole day on Friday. He was wiped out. That had went away, and he was up to par again. Question: Also, when the caller spoke to med info before "there wasn't any information" about a conflict taking Ibrance and the Pfizer covid vaccine. "Do you have any more information now". Patient History: No. Investigation Assessment: No. He did not have to go the doctor or ER. History of all previous immunization with the Pfizer vaccine considered as suspect: not provided. Additional Vaccines Administered on Same Date of the Pfizer Suspect: not provided. Did any AE(s)require a visit to: Emergency Room: no. Physician Office: no. prior Vaccinations (within 4 weeks): not provided. Patient's  Medical History (including any illness at time of vaccination): Provide other relevant medical history including but not limited to these conditions: diagnosed allergies, compromised immune status, respiratory illness, genetic/chromosomal abnormalities, endocrine abnormalities (including diabetes) and obesity: not provided. Relevant Tests: List other relevant diagnostic and confirmatory test results for event(s), for example, from blood tests, cerebrospinal fluid culture, bacterial sero-type, diagnostic imaging, (e.g., chest X-ray, MRI): Not provided. Patient had to get both vaccines in his right arm because when he was diagnosed with breast cancer, they removed a lymph node and he cannot had a blood test or shots done in the arm. Patient's wife doesn't had the NDC/lot/expiration for his Ibrance 75mg. He just threw it out because he was done with that cycle.   No follow-up attempts are possible. No further information is expected.