Her stool has not been normal; couldn't eat, nothing was appetizing; messed with her stomach, it's off balance/stomach does not feel balanced; tired/exhausted; Feels like she is starving; nauseated/stomach is so nauseous; diarrhea; throwing up; Can't eat normal portions; This is a spontaneous report from a contactable consumer (patient). A 31-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: EW0162), dose 1 via an unspecified route of administration, administered in Arm Left on 15Apr2021 09:00 as 1st dose, single (Not sure of the dose, but the injection was very fast) for covid-19 immunisation.  Medical history included hiv from 2015 and ongoing (diagnosed in 2015, and has undetectable, CD4 count has been great. Ongoing but, undetectable). Concomitant medications included abacavir sulfate, dolutegravir sodium, lamivudine (TRIUMEQ) taking for over 6 years, still currently taking. States there is only one dosage, there's no milligram or anything, and she has to take it; estradiol valerate (ESTRADIOL VALERATE) this medication not injected into the same site as the COVID vaccine. She has been taking for the past 8 months and is still taking it.. The patient stated he had the first dose of the Pfizer covid 19 vaccine on 15Apr2021. Since the she has been starving because she can't eat. The patient stated she was HIV undetectable, takes Triumeq, had monoclonal antibody treatment and had covid. She stated she did not know if her side effects are related to the vaccine, an interaction between the vaccine and his medication or because she had covid and/or took monoclonal antibody treatment. The patient stated her stomach does not feel balanced. She stated she took one or two bites then she felt like she can not eat anymore. The patient stated she was eating a quarter of the normal portions. The patient stated she is nauseated and having diarrhea. The patient stated it was affecting her daily life noting she feels cranky and tired because he was not getting enough food in her system. The patient stated she we starving when she ate stating the food goes right through her. The patient stated she was going through horrible side effects. She cannot eat. The patient stated that she saw his PCP, an immediate care and the ER. The patient stated that none of them have any information on how to treat her symptoms. Her stomach is so nauseous and when she eats it goes right through her. She has been to the ER and to her doctor about this, and everyone says they just know much about the vaccine, which is scary to her, that no one can treat her, they don't know if this is a side effect or anything and she doesn't know what to do. She reports she is trying to stay awake but, she does not feel like she is getting the proper nutrition. She is very tired and she can force herself to stay up but she's hungry, and does not want to eat because, if she does, she has got to be in the restroom with in 10 minutes. Her stool has not been normal since the vaccine. It's messed up, the day she got the vaccine, she ate beforehand, just toast, and after getting it she wasn't hungry she could drink fluids but she would throw it up, even if it was just water. The next day she couldn't eat at all, she reports having a fruit smoothie but couldn't keep it down, had diarrhea all day. That day she was in bed all day. She reports she can't eat normal portions because she feels full after a few bite and the is right back in the restroom again. The patient wants to know if this is a normal side effect of the vaccine and if it has been reported? Also, she wants to know what she can do to soothe her stomach she wonders? She isn't looking for something to boost her appetite, because it's there, but wondering if something with the vaccine has messed with her stomach, it's off balance. She got the vaccine at 9 am (15Apr2021 09:00) at 3 o'clock (15Apr2021 15:00) she started feeling nauseous and couldn't eat, nothing was appetizing, so she got a smoothie and it went on from there. She is questioning if she should get the second dose, it is scheduled on 06May021. About 5 years ago, after her HIV diagnosis she stopped getting flu vaccine because of a horrible reaction to it, she was sick for 2 weeks, she felt like she was dying, couldn't eat, she couldn't keep anything down, she was exhausted. She could at least keep something down at that time like the brat diet. Right now she can't eat anything and nothing is absorbing. She doesn't think she is getting the proper nutrition in because everything is coming out liquid, she knows that is disgusting but, that is how it. Her husband had the vaccine the same day she did and he was fine, she doesn't understand. On 16Apr2021, she is very tired and trying to stay awak and feels like she is starving. Can't eat anything because of feeling nauseous and when she eats it goes right through. Has been throwing up and having diarrhea. The AEs require a visit to Emergency Room and Physician Office. There is prior Vaccinations (within 4 weeks). AEs following prior vaccinations was Flu vaccine. The outcoem of the events was not resolved.