Back ache; Platelets low; Headache; This is a spontaneous report received from a contactable reporter (Consumer). The reporter is the patient.  A 76-year-old female patient received BNT162B2 (BNT162B2), administered in arm left, administration date 02Apr2021 09:00 (Lot number: ER8733, Expiration Date: 31Dec2022) at the age of 76 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "COPD" (unspecified if ongoing), notes: 2017 or 2018 diagnosed.; "Breast cancer operation for a lumpectomy on right breast", start date: 2019 (unspecified if ongoing); "Removal of lymph nodes out of right arm", start date: 2019 (unspecified if ongoing); "Pulmonary embolism", start date: 19Jan2013 (unspecified if ongoing), notes: She is a miracle and had an pulmonary embolism in 19 Jan 2013.; "High blood pressure" (ongoing); "Diverticulitis" (ongoing); "She started having headaches after breast Cancer operation Aug 2019", start date: 2019 (unspecified if ongoing); "Before she took shot, she was having hose bleeds about twice a month" (unspecified if ongoing); "Her blood pressure had been very high.  It has been running high because of anxiety" (unspecified if ongoing). Concomitant medication(s) included: LOSARTAN taken for hypertension; HYDROCHLOROTHIAZIDE taken for hypertension; DICYCLOMINE taken for diverticulitis, start date: May2019. The following information was reported: HEADACHE (non-serious) with onset 05Apr2021, outcome "not recovered", described as "Headache"; PLATELET COUNT DECREASED (non-serious) with onset 14Apr2021, outcome "unknown", described as "Platelets low"; BACK PAIN (non-serious), outcome "not recovered", described as "Back ache". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of back pain. Additional Information: The patient was taking Losartan and Hydrochlorothiazide for a year and a half or maybe more, and Dicyclomine, she was to take three times daily and she only took one tablet at 5pm before she took half of Losartan. She was a miracle and had a pulmonary embolism in 19 Jan 2013. The patient had been on oxygen but not 24 hours. She did not start on 24 hours until 2019, when she took the breast cancer operation for a lumpectomy on right breast and removal of lymph nodes out of right arm. She confirmed that she was on oxygen and had COPD prior to the vaccine. She had been having headaches and backaches after the first shot. The headaches are excruciating. Before she took shot, she was having nose bleeds about twice a month. They were not severe. She was 5'1". She lost that before the vaccine. She has been eating pound cake and does not know what she is. This pandemic has her eating. She cannot do anything else. She started having headaches after breast cancer operation Aug2019. They were not bad. During her breast cancer surgery, on her right arm, they took lymph nodes, and she has a port on right side near shoulder. It was supposed to be for chemo but she did not take any. She took radiation. All were prior to the vaccine. She did put some Lidocaine on her arm so she would not feel it before she got the vaccine injection. She had it from when she was getting treatment for breast cancer. She was taking INR every week. She just rubbed the Lidocaine on it and told the person who gave the injection that she had put it on there. He said she would not feel it anyway. She said her blood pressure may go down to 119 and it may go up to 180's to 190's. Then they said 119 is too low.  She does not drink or smoke. She does not know what makes her blood pressure go up besides fussing. Her blood pressure had been very high. It has been running high because of anxiety. That started before the vaccine. She does not smoke or drink, so she doesn't know what is causing it. Back aches started a week ago. She was told to drink more water. She is drinking more water and taking her medication. They will give her something when she sees her doctor for the backaches. She had the patches to put across back and they work pretty good. She had to go to her oncologist tomorrow before she goes in. With her having the headaches, they were planning on doing an MRI on her brain. She was having them prior and now has had the headaches really bad. They want her to come in tomorrow for blood test. Her primary care just did blood test on everything. They told her she had low blood platelets. She went to her on 07 Apr 2021 and later stated it was 14Apr2021. Her oncologist wants her to come in and recheck blood work to check platelets on 02May2021.   No follow-up attempts are possible. No further information is expected.