thinking its acid reflux; Burning in stomach; Hurting in stomach/some pain in stomach; Metallic taste in her mouth; She had some fever; Headache; Tiredness; Body aches; About 12 hours after receiving 2nd dose, her arm started to get sore; Stomach discomfort/feels discomfort and heaviness on top of the stomach; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of PAIN IN EXTREMITY (About 12 hours after receiving 2nd dose, her arm started to get sore), ABDOMINAL DISCOMFORT (Stomach discomfort/feels discomfort and heaviness on top of the stomach), GASTROOESOPHAGEAL REFLUX DISEASE (thinking its acid reflux), DYSPEPSIA (Burning in stomach) and ABDOMINAL PAIN UPPER (Hurting in stomach/some pain in stomach) in a 60-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 007M20A and 038K20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No medical information was provided by the reporter.  Concomitant products included MONTELUKAST SODIUM (SINGULAIR), LEVOTHYROXINE, MULTIVITAMIN [VITAMINS NOS] and FISH OIL for an unknown indication.   On 28-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 25-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 25-Feb-2021, the patient experienced PAIN IN EXTREMITY (About 12 hours after receiving 2nd dose, her arm started to get sore), ABDOMINAL DISCOMFORT (Stomach discomfort/feels discomfort and heaviness on top of the stomach) and HEADACHE (Headache). 25-Feb-2021, the patient experienced DYSGEUSIA (Metallic taste in her mouth), PYREXIA (She had some fever), FATIGUE (Tiredness) and MYALGIA (Body aches). On 26-Feb-2021, the patient experienced DYSPEPSIA (Burning in stomach). 26-Feb-2021, the patient experienced ABDOMINAL PAIN UPPER (Hurting in stomach/some pain in stomach). On an unknown date, the patient experienced GASTROOESOPHAGEAL REFLUX DISEASE (thinking its acid reflux). The patient was treated with FAMOTIDINE (PEPCID AC) at an unspecified dose and frequency; OMEPRAZOLE (PRILOSEC [OMEPRAZOLE]) at an unspecified dose and frequency and ESOMEPRAZOLE MAGNESIUM TRIHYDRATE (NEXIUM [ESOMEPRAZOLE MAGNESIUM TRIHYDRATE]) at an unspecified dose and frequency. On 26-Feb-2021, PAIN IN EXTREMITY (About 12 hours after receiving 2nd dose, her arm started to get sore), HEADACHE (Headache), FATIGUE (Tiredness) and MYALGIA (Body aches) had resolved. At the time of the report, ABDOMINAL DISCOMFORT (Stomach discomfort/feels discomfort and heaviness on top of the stomach), GASTROOESOPHAGEAL REFLUX DISEASE (thinking its acid reflux), DYSPEPSIA (Burning in stomach), DYSGEUSIA (Metallic taste in her mouth) and PYREXIA (She had some fever) outcome was unknown and ABDOMINAL PAIN UPPER (Hurting in stomach/some pain in stomach) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Endoscopy: unknown (Inconclusive) Unknown.         It was reported that about 12 hours after receiving 2nd dose, patient arm started to get sore. She had some fever, headache and stomach discomfort, tiredness and body aches. After 24 hours later(26Feb2021), she only had stomach discomfort with burning and hurting in stomach. She feels discomfort and heaviness on top of the stomach. patient reported metallic taste in her mouth that started on 25-Feb-2021. She wants to know about commonly reported side effects It was reported that the patient experienced a lot of stomach problems, burning. She took a lot of medications. She went through tests, saw doctors. She said her symptoms didn't end a day or two after the vaccine and it is still a problem. She said it might have changed. She is on medication now. Ten days before second dose the symptoms went away. After the second dose, on the first day she had fever and wasn't feeling well. On the second day, problem came back, and it was worse. She had burning and some pain in stomach. She started taking antacids, tried several different medicines. A month into it, started taking Nexium over the counter. It helped a little bit. She went to GI doctor, did endoscopy, checked gall bladder. They put her on diet to see if it's gall bladder. Pain went away with diet. Now they're thinking its acid reflux.   Treatment provided Tums, Milk of magnesia . Action taken with mRNA-1273 in response to the event was not applicable.   This case was linked to US-MODERNATX, INC.-MOD-2021-024653 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 10-May-2021: Follow up received on 10-May-2021 and included significant information such as New events were added, Treatment information about the patient was added, New lab test was added and details about doctor consultation was added.; Sender's Comments:  US-MODERNATX, INC.-MOD-2021-024653:1st dose