can't walk/unbearable pain can not walk; pain went to her heel, like it was tight,shoots up to her thigh, reinforces the pain in her thigh, cannot put my right foot on the ground without searing pain in both ankle and thigh; muscles tighten around her heel, Muscle pain; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of GAIT DISTURBANCE (can't walk/unbearable pain can not walk), PAIN IN EXTREMITY (pain went to her heel, like it was tight,shoots up to her thigh, reinforces the pain in her thigh, cannot put my right foot on the ground without searing pain in both ankle and thigh) and MUSCLE TIGHTNESS (muscles tighten around her heel, Muscle pain) in a 76-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 045J21A, 023M20A and 042L20A) for COVID-19 vaccination.     Previously administered products included for Product used for unknown indication: Shingles (shingles in Arm and dose 1 of 2) on 14-Mar-2021. Past adverse reactions to the above products included No adverse event with Shingles. Concurrent medical conditions included Penicillin allergy, Drug allergy (NSAIDS) and Atrial fibrillation (AFIB) since 1981. Concomitant products included ATORVASTATIN, RAMIPRIL, APIXABAN (ELIQUIS) and METOPROLOL for an unknown indication.   On 21-Jan-2021 at 10:00 AM, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 18-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 07-Dec-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 18-Dec-2021, the patient experienced GAIT DISTURBANCE (can't walk/unbearable pain can not walk), PAIN IN EXTREMITY (pain went to her heel, like it was tight,shoots up to her thigh, reinforces the pain in her thigh, cannot put my right foot on the ground without searing pain in both ankle and thigh) and MUSCLE TIGHTNESS (muscles tighten around her heel, Muscle pain). The patient was treated with PARACETAMOL (TYLENOL [PARACETAMOL]) for Pain, at an unspecified dose and frequency; CEFIXIME (FLEXERIL [CEFIXIME]) for Pain, at an unspecified dose and frequency and Physical therapy (spent 8 months in physical therapy and acupuncture) for Gait disturbance. At the time of the report, GAIT DISTURBANCE (can't walk/unbearable pain can not walk), PAIN IN EXTREMITY (pain went to her heel, like it was tight,shoots up to her thigh, reinforces the pain in her thigh, cannot put my right foot on the ground without searing pain in both ankle and thigh) and MUSCLE TIGHTNESS (muscles tighten around her heel, Muscle pain) had not resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Patient took concomitant medications over 25 years,The concomitant medication was Succer.   It was reported that muscle pain came back much worse than before, right leg then thigh and ankle. Pain was unbearable and could not walk. That continued as patient could not put her right foot on the ground without pain in both ankle and thigh.  Patient stated she was still in treatment, she had taken extra strength of Tylenol, flexeril which do not alleviate the pain.  Lab data included on 23rd Dec 2021, MRI lumbar spine without contrast.   This case was linked to MOD-2021-433983 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 09-Jan-2022: Follow up received added patient demographics, medical history. added suspect product details, concomitants, treatment medication, event outcome updated as not recovered..