Flashing light hallucinations; Pain in joints; Numbing of toes both sides; Toes tingling/ Fingers tingling/ Occasionally numbing and tingling fingers both hands; Insomnia / Slept for 6 to 7 hrs knocked out completely / Cant sleep at night; Pain in hips and legs up to knees/ Pain in legs feet and fingers; Bone pain; Sleep seven hours in raw; "could not drive"; Body pain/ Constant pain in body; Tiredness/ Fatigue; This spontaneous case was reported by a consumer and describes the occurrence of HALLUCINATION, VISUAL (Flashing light hallucinations) in an 81-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 013M20A and 036A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No medical history was provided by the reporter.  Concurrent medical conditions included Drug allergy (Macrobid allergy), Fibromyalgia (Fibromyalgia was under control. Unbearable now.), Arthritis (Arthritis was under control. Unbearable now.) and Myalgia. Concomitant products included DOXYCYCLINE, VITAMIN A [RETINOL], VITAMIN B NOS, VITAMIN D NOS and MULTIVITAMIN [VITAMINS NOS] for an unknown indication.   On 06-Feb-2021 at 10:00 AM, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 06-Mar-2021 at 10:30 AM, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 06-Mar-2021, the patient experienced BONE PAIN (Bone pain), MYALGIA (Body pain/ Constant pain in body) and FATIGUE (Tiredness/ Fatigue). 06-Mar-2021, the patient experienced HYPERSOMNIA (Sleep seven hours in raw) and IMPAIRED DRIVING ABILITY ("could not drive"). On 22-Mar-2021, the patient experienced HYPOAESTHESIA (Numbing of toes both sides), PARAESTHESIA (Toes tingling/ Fingers tingling/ Occasionally numbing and tingling fingers both hands), INSOMNIA (Insomnia / Slept for 6 to 7 hrs knocked out completely / Cant sleep at night) and PAIN IN EXTREMITY (Pain in hips and legs up to knees/ Pain in legs feet and fingers). On an unknown date, the patient experienced HALLUCINATION, VISUAL (Flashing light hallucinations) (seriousness criterion medically significant) and ARTHRALGIA (Pain in joints). The patient was treated with PARACETAMOL (TYLENOL) ongoing since an unknown date for Myalgia, at a dose of 2 dosage form. On 08-Mar-2021, HYPERSOMNIA (Sleep seven hours in raw) and IMPAIRED DRIVING ABILITY ("could not drive") had resolved. At the time of the report, HALLUCINATION, VISUAL (Flashing light hallucinations) and ARTHRALGIA (Pain in joints) outcome was unknown and HYPOAESTHESIA (Numbing of toes both sides), PARAESTHESIA (Toes tingling/ Fingers tingling/ Occasionally numbing and tingling fingers both hands), INSOMNIA (Insomnia / Slept for 6 to 7 hrs knocked out completely / Cant sleep at night), PAIN IN EXTREMITY (Pain in hips and legs up to knees/ Pain in legs feet and fingers), BONE PAIN (Bone pain), MYALGIA (Body pain/ Constant pain in body) and FATIGUE (Tiredness/ Fatigue) had not resolved.            The patient had implant dental work near 2 weeks ago around 10-Apr-2021 and received Doxycycline. The patient reported that the doctor won't return the call.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.   Most recent FOLLOW-UP information incorporated above includes: On 20-Jun-2021: Additional information received included patient demographics race, relevant history details including Macrobid allergy, current condition fibromyalgia and arthritis; new concomitant medications added; Treatment medicines were added . Added New adverse event  Flashing light hallucinations.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.