Focal seizures; Heart enlarged; Am still sick; Hypertension; Interchange of vaccine products; Headache; This spontaneous case was reported by a consumer and describes the occurrence of PARTIAL SEIZURES (Focal seizures) and CARDIOMEGALY (Heart enlarged) in a patient of an unknown age and gender who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.    Co-suspect product included non-company product TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for COVID-19 vaccination.    The patient's past medical history included Pregnancy (Pregnancy with last month of period). Concurrent medical conditions included Blood pressure (Spike in blood pressure.) and Migraine. Concomitant products included AMLODIPINE and METOPROLOL for Blood pressure.   On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form and second dose of TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) (unknown route) 1 dosage form. On an unknown date, the patient experienced PARTIAL SEIZURES (Focal seizures) (seriousness criterion medically significant), CARDIOMEGALY (Heart enlarged) (seriousness criterion medically significant), VACCINATION COMPLICATION (Am still sick), HYPERTENSION (Hypertension), INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products) and HEADACHE (Headache). At the time of the report, PARTIAL SEIZURES (Focal seizures), HYPERTENSION (Hypertension) and HEADACHE (Headache) outcome was unknown, CARDIOMEGALY (Heart enlarged) and VACCINATION COMPLICATION (Am still sick) had not resolved and INTERCHANGE OF VACCINE PRODUCTS (Interchange of vaccine products) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Blood pressure measurement: high (High) hypertension. On an unknown date, Full blood count: unknown (Inconclusive) unknown and unknown (Inconclusive) CBC with differential was unknown. On an unknown date, Heart rate: 158 (High) pulse spikes to 158 [High pulse rate]. On an unknown date, Troponin I: unknown (Inconclusive) unknown.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       This report refers to a case of INTERCHANGE OF VACCINE PRODUCTS for mRNA-1273 with associated AEs. All reported events were assessed as possibly related due to temporal association, however very limited information preclude proper medical assessment.   Most recent FOLLOW-UP information incorporated above includes: On 02-Jun-2021: Additional information received on 2-JUN-2021, contain significant information that includes Updated  reporter details, lab data, and adverse event: Focal seizure. On 06-Jul-2021: Additional information received on 6-JUL-2021 that contains significant information - Other relevant history, concomitant medications were added. On 06-Jul-2021: Follow up includes diagnosis ADR ( headache and hypertension ) as well as lab data  ( CBS , CBC with differential , CMP and Troponin I).; Sender's Comments: This report refers to a case of INTERCHANGE OF VACCINE PRODUCTS  for mRNA-1273 with  associated AEs. All reported events were assessed as possibly related due to temporal association, however very limited information preclude proper medical assessment.