Started getting tired and sleepy; A lot of sleeping; This is a spontaneous report from a contactable consumer. This 78-year-old female consumer (patient) reported that.  A 78-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, Batch/Lot number was not reported), dose 2 via an unspecified route of administration, administered in Arm Right on 04May2021 14:00 as (At the age of 78-years) DOSE 2, SINGLE for covid-19 immunisation.  Medical history included sulfa allergy, Usually has trouble sleeping from an unknown date and unknown if ongoing. The patient's concomitant medications were not reported. No Prior Vaccinations within 4 weeks. No Additional Vaccines Administered on Same Date of the Pfizer Suspect. No AE following prior vaccinations. No Family Medical History Relevant to AE. No Relevant Tests was performed. The patient previously took first dose of BNT162B2 on 04Apr2021 in right arm, at 2:00pm for COVID-19 immunization. On an unspecified date in May2021 patient experienced Started getting tired and sleepy and A lot of sleeping. It was reported that Caller is a 78-year-old consumer who is asking about side effects from the Pfizer COVID-19 vaccine. She states that she has no problems with her first dose of the vaccine. Per her report, it went perfect, no problems. The caller states that after her second dose she initially had no side effect for 4 or 5 days but then she started getting tired and sleepy. She states that she usually has trouble sleeping but she has been so tired and sleepy that her son and daughter came into her house and it did not even wake her up which was concerning to her. She states, she trying to keep awake right now, it's hard though because his doctor wants to keep his feet elevated so when she sits in the recliner with his feet up then she falls asleep She did call her doctor and she was told that this was probably side effects from the vaccine, however, she would like to know if other people have reported this side effect. Upon Follow-up it was reported that the caller has one question. She says she received the last dose of the Pfizer shot, confirmed later as the Pfizer COVID-19 vaccine, on 04May2021, and for 4 days she was fine but then all of the sudden she was doing a lot of sleeping which she usually doesn't do. She asks has anyone else reported that they they are sleeping a lot. The caller is not sure about her height and weight and gives a guess. She says years ago in the 60's she worked at a nursing home. She says she was not a registered nurse; she was a medical assistant. She says she was concerned about the sleeping, as long as she stays up, when she sits down, she falls asleep. She says she mentioned it to her doctor who said might be the shot. The caller says she is not sure start date of doing a lot of sleeping. She says other people have slept a lot too. She says they slept about a week; this has been 2 weeks, so she is concerned. Potential clone identified after the call; no further information provided about the other people who experienced sleeping a lot. She says today she busy doing stuff, she sat down for a minute at like 1:00 then the next thing she knew it was 1:45. She says she fell asleep that quick. The caller says that's what made her ask the doctor about it. The caller says she changed her medications and thought it might have been the medicine, but the doctor said it was probably the shot. The caller later denies being on any medications that we should include in this report; no further information obtained about the medication. The caller does not take any medications, have any conditions, or have any medical results that she thinks we should include on this report. She says it might be the shot. She says she went to her doctor on 20May2021, and she told her she was still sleeping so she just thought to call Pfizer. The events were assessed as non serious by reporter.  The outcome of event started getting tired and sleepy was unknown, and the outcome of event a lot of sleeping was not recovered.  Information about batch/lot number has been requested.