they were told they were getting the Moderna vaccination but she was given the paperwork for the Pfizer Covid 19 vaccine; sore arm/arm is continuing to hurt and her lump is bigger and now it's getting red; increased redness at the injection site; The pain is also described as hurting up into the shoulder; arm is continuing to hurt and her lump is bigger and now it's getting red; arm is getting redder and larger and it hurts up into her shoulder and down to her elbow; arm is getting redder and larger and it hurts up into her shoulder and down to her elbow; mother has back problem and she is having back pain now too; This is a spontaneous report from a contactable consumer (Patients daughter) reporting for her mother. A 93-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot number and Expiration date was not reported), dose 1 via an unspecified route of administration on 22Mar2021 11:30 (at the age of 93 years) as dose 1, single for covid-19 immunisation; covid-19 vaccine mrna (mrna 1273) (MODERNA COVID-19 VACCINE), via an unspecified route of administration on an unspecified date, at dose number unknown, single for an unspecified indication. Medical history included dementia (Verbatim: dementia), myocardial infarction (Verbatim: 4 heart attacks), stroke (Verbatim: 4 strokes), angioplasty (Verbatim: 9 angioplasties), angiogram (Verbatim: reaction to the dye when she gets the angiograms), mother has back problem, thyroid. On an unspecified date concomitant medication(s) included ongoing warfarin (WARFARIN); unspecified thyroid medication(0.075mg) she doesn't think her mother needs her thyroid medication anymore, but the caller needs her thyroid medication because she doesn't have a thyroid. The patient did not receive any other vaccines within four weeks prior to the vaccination. The patient experienced they were told they were getting the moderna vaccination but she was given the paperwork for the pfizer covid 19 vaccine, sore arm/arm is continuing to hurt and her lump is bigger and now it's getting red and ongoing, increased redness at the injection site, the pain is also described as hurting up into the shoulder and ongoing, arm is continuing to hurt and her lump is bigger and now it's getting red, arm is getting redder and larger and it hurts up into her shoulder and down to her elbow, mother has back problem and she is having back pain now too. Reporter stated, she wanted to know if her mother should take the second dose of the Pfizer COVID-19 vaccine since she has had these side effects after receiving the first dose, she should use hot or cold packs to help her mother's arm pain from the Pfizer COVID-19 vaccine injection, how long she can expect her mother's side effects to last after receiving the first dose of the Pfizer COVID-19 vaccine. She states it's difficult to determine exactly how painful her mother's arm is because of her limited cognition and ability to describe the pain, also states that at times the mother will refuse to use her arm and other times she will use it as if there is no problem. Her mother does have a pacemaker and defibrillator and the facility was advised of that before her mother had the Covid 19 vaccine. She reports that they were told they were getting the Moderna vaccination but she was given the paperwork for the Pfizer Covid 19 vaccine. She's assuming since she had received the Pfizer paperwork that she and her mother had received the Pfizer Covid vaccine. Patient asking why her arm is sore and with her age and her dementia a few years ago her mother wouldn't have been complaining. She would have been different. She would have thought that her arm soreness was just part of the vaccine. Now reporter is concerned. She just wanted to call and check because her mother keeps holding her arm. Yesterday she put ice on it and she doesn't know if she should have done that. The caller reports she tries not to take her mother out because of Covid 19. She does go to the heart doctor because she's on the blood thinners and has the pace maker and defibrillator. Her mother has a tendency to get any infection easier now. Patient acts like a child sometimes in showing her arm and complaining about it. Daughter doesn't remember when her mother's arm started hurting. She remembers her mom saying there was a lump in her arm and the felt her own arm and felt a little lump in her arm too. Patient had open heart surgery also and the doctor went in and put a clamp on her leaking valve in her heart. She did have a reaction to an antibiotic during that time. reporter doesn't recall the name of the antibiotic. She reports it was done intravenously and her mother came out red as a beet, reporter states because of the Covid 19 you have to be in bad shape to go to the emergency room. The outcome of event arm is continuing to hurt and her lump is bigger and now it's getting red, arm is getting redder and larger and it hurts up into her shoulder and down to her elbow was not recovered rest of all event outcome was unknown.  Description of complaint: Caller reports her mother is on Warfarin and occasionally the doctor has to change it up a little bit. The warfarin is in a pharmacy bottle. TARO is the manufacturer. Caller does not see an NDC/Lot/Expiry.   No follow-up attempts are possible. Information on lot/batch number cannot be obtained.