sore arm; tired; This is a spontaneous report received from a non-contactable reporter(s) (Consumer or other non-HCP) from medical information team for a Pfizer sponsored program. The reporter is the patient.  A female patient received bnt162b2 (BNT162B2) (Batch/Lot number: unknown) as dose 1, single for covid-19 immunizations. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: PAIN IN EXTREMITY (non-serious), outcome "unknown", described as "sore arm"; FATIGUE (non-serious), outcome "unknown", described as "tired".  Additional information: Caller who does not wish to provide call back number had the booster dose yesterday with her parents who had a scheduled appointment to receive theirs. The caller states that for the 1st and 2nd dose she had heard to not take Advil before the vaccination due to it may having an effect on the effectiveness of the vaccination. Because of this guidance, the caller did not take the medication before or after the vaccination for her 1st or 2nd doses. However, yesterday about 1.5 hours before she got her booster dose, the caller states she began having a headache and she took 2 Advil. Now she is afraid it will affect the effectiveness of the vaccine dose she received. The caller states she was not planning on getting the booster dose this day, but they had an extra dose when she went with her parents to receive theirs, so she ended up taking it while she was there with her parents. It was not until later, 2 hours, she remembered she took the Advil, and she became "stressed" over it. Caller states that her father takes Tylenol on a daily basis, 2 times a day. He had not taken it because she had advised him to stop taking it the morning before he received his booster dose, but the caller would like to know when he can resume taking the Tylenol. The Tylenol is given due to orthopedic concerns and a recent surgery he has had and not due to any effects noted from the vaccination. Caller states that she heard the guidance on the news regarding not taking medication before the vaccine. She feels that this should be information that is blasted as it could affect the effectiveness of the vaccine. She questions if this may be a cause to some of the breakthrough cases. Could those who are experiencing break through cases be those who took pain relievers prior to their injections and there effected the effectiveness of the vaccine. Due to her taking the Advil prior to her vaccine, she is worried now that the vaccine will not be as effective or how well it will work for me. Product: COMIRNATY Question: Caller states with her 2nd vaccine, the next day she had a low-grade fever with achiness of her joints and muscles. She is unsure which of the 2 may have been sore. She also notes that she was tired and so forth. Her arm was also sore. She states it seems that after her booster dose now she is having very similar symptoms she had after her 2nd dose. She is hoping the immune system is working as strongly as it was working beforehand. She states some people do not have any symptoms. After her 1st vaccine the caller notes having a sore arm and not much else, maybe tired. The 2nd vaccine hit much harder, sore for several days, headache that night and low-grade fevers. The caller did not take any medication due to her side effects and noted that coffee worked. She reports having achiness for several days after the vaccine. Caller also notes that her sore arm was not as bad as the first injection and last night her arm was very sore Caller notes that they have been so careful about 1.5 years and just hearing about breakthrough cases. I know some where people have died. Caller is hoping that the vaccine is working as efficiently as expected despite her taking 2 Advil prior to the injection for a headache she was developing prior to the vaccine administration. Caller is somewhat rest assured as she did not take Advil before her 1st and second doses, and she is having similar reaction this time around as she was after her 2nd dose.   No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.