I tired very easily; I could not STAND, I couldn't walk on myown; I had an extreme sprain or strain to the muscles in my body; excruciating pain in joints of right sides/It was localized in her knees/She felt that there was a chemical that reacted with her joints.; At night, her whole right side was affected.; She could barely walk; The pain was on bottom side of her right leg/Sore arm; pain is horrible; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION COMPLICATION (At night, her whole right side was affected.), GAIT DISTURBANCE (She could barely walk), PAIN IN EXTREMITY (The pain was on bottom side of her right leg/Sore arm), PAIN (pain is horrible) and DYSSTASIA (I could not STAND, I couldn't walk on myown) in an 81-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 014F21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Hip replacement (11 years ago). Concurrent medical conditions included Cane user. Concomitant products included WARFARIN SODIUM (COUMADIN) and ACETYLSALICYLIC ACID (ASPIRIN) for an unknown indication.    On 13-Sep-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) .5 ml. On 13-Sep-2021, the patient experienced VACCINATION COMPLICATION (At night, her whole right side was affected.), GAIT DISTURBANCE (She could barely walk), PAIN IN EXTREMITY (The pain was on bottom side of her right leg/Sore arm), PAIN (pain is horrible) and ARTHRALGIA (excruciating pain in joints of right sides/It was localized in her knees/She felt that there was a chemical that reacted with her joints.). On 14-Sep-2021, the patient experienced DYSSTASIA (I could not STAND, I couldn't walk on myown) and MUSCLE STRAIN (I had an extreme sprain or strain to the muscles in my body). On an unknown date, the patient experienced FATIGUE (I tired very easily). The patient was treated with PARACETAMOL (TYLENOL) for Pain, at an unspecified dose and frequency. At the time of the report, VACCINATION COMPLICATION (At night, her whole right side was affected.), GAIT DISTURBANCE (She could barely walk), PAIN IN EXTREMITY (The pain was on bottom side of her right leg/Sore arm), PAIN (pain is horrible), DYSSTASIA (I could not STAND, I couldn't walk on myown), MUSCLE STRAIN (I had an extreme sprain or strain to the muscles in my body), ARTHRALGIA (excruciating pain in joints of right sides/It was localized in her knees/She felt that there was a chemical that reacted with her joints.) and FATIGUE (I tired very easily) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   Concomitant medications taken were cholesterol medicine and BP medicine. The pain was horrible that patient was not going to get 2nd dose.   Patient reported after 15 to 20 minutes after taking vaccine passed by with no indication of results from Vaccine. The day went well, had erranded to run and that night in bed was when she had a bit of a sore arm; and had pain in her joints on the right side of her body. The next day she could not stand, was in excruciating pain on the right side of the body from hip down to ankles. This was not pain like in muscle pain, but more like a chemical pain that felt like she had an extreme sprain or strain to the muscles in body. She tried exercising at the gym one day; that didn't do any good but made it worse because the Gym Instructor had to help her to the car even with cane use. Patient did not have a fever, but did begin taking Tylenol for this pain. This pain was worse than hip pain before I had a hip replacement 11 years ago. She could not walk on own, She used a cane to help support her body. She had have never experienced such pain before. Patient also stated that pain procedure was not a normal pain that she had ever experienced. On 28/Sep/2021 she walked without a cane; however, she tired very easily and then have to either sit or lay down or use a cane for support.   Most recent FOLLOW-UP information incorporated above includes: On 28-Sep-2021: significant follow up appended  : New Events (Dysstasia, muscle strain, fatigue) were added. The Verbatim 'the pain was on bottom side of her right leg' was subsumed with 'sore arm'. Procedure (hip replacement) added. Clinical course added in I-narrative. Corresponding fields and narrative updated accordingly.