This is a spontaneous report received from a contactable consumer (patient) and other HCP. A 51-year-old non-pregnant female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot number: EW0150), via an unspecified route of administration, administered in arm left on 09Apr2021 at 01:00 PM (at the age of 51-year-old) as dose 1, single for COVID-19 immunization on public health clinic/veterans administration facility. The patient medical history included high blood pressure (patient says that this was diagnosed a few years back, over ten years ago), has a heart condition with heart palpitations that she just started having three months ago now, diagnosed during 2021 and sleep apnea. The patient's concomitant medications include one medication for her high blood pressure. The patient past drug included Motrin and experienced allergy (Allergies to medications, food, or other products: Motrin). If COVID prior vaccination was unknown and no COVID tested post vaccination. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine and not received any other medications within 2 weeks of vaccination. Since the vaccination, the patient had not been tested for COVID-19. On an unspecified date in 2021, the patient experienced nauseous right after the injection. On 09Apr2021 at 01:00 PM, the patient experienced severe constipation, stomach pain was balling up in knots and it is still balled up in knots and chest pains. Ae resulted in emergency room/department or urgent care. Adverse event: Abdominal stomach pain constipation chest pains. Patient calling about the Pfizer COVID-19 vaccine who says she had her first dose April 9th, and ever since she got the vaccine, she has been having severe constipation and stomach pains. Patient only got the first dose so far. She says NDC/EXP were not provided on the vaccine card. She says her first dose was injected on her left arm at 01:00 PM on April 9th. AE: severe constipation and stomach pain: Patient says the stomach pains started as soon as she got the first dose of the vaccine, she was nauseous right after the injection. She says her stomach was balling up in knots and it is still balled up in knots. AE treatment: Patient says she took some some laxatives, but she still hasn't been, she is about to go back the ER for this. She says that she has been drinking a lot of water, changed her diet, she has took stomach Mylanta (documented as provided), and she took what the hospital had given her, which was a medication for nausea. No further details provided about her nausea medicine. She says she was not admitted, she just went to the ER, she went April 9th and they did an EKG on her, she is not sure if they did labs, she doesn't think so. EKG results not provided. She says she will probably go back to the ER again since she is not able to make a bowel movement. She says she took some MiraLAX as well for constipation. Mylanta UPC: 1990301028, LOT: 79962, EXP: Dec2022. Patient says she took a half a teaspoon full of Mylanta, one time. MiraLAX: LOT: 005124, EXP: Sep2022 UPC: Unknown, Patient says this is covered by a prescription label. Patient says she just took that one time, a spoon full or half a capsule full, documented as provided. Concomitant Medications: Patient says she had no other vaccines given that day she got the Pfizer COVID-19 vaccine or in the four weeks prior. She says she has started no new meds; she only takes one medication for her high blood pressure. No further details provided about her high blood pressure medication. The patient underwent lab tests and procedures which included EKG results not provided. The patient received treatment for the events constipation, stomach pain, nauseous. Outcome of the event nausea was unknown; outcome of remaining all events was not recovered.  No follow-up attempts are needed. No further information is expected.