Age: 17.0
Sex: F
Vaccine: COVID19, COVID19
Symptoms: Accidental underdose, Inappropriate schedule of product administration, Product administered to patient of inappropriate age
Clinical narrative: Moderna 0.25ml given instead of Pfizer 0.5ml for 2nd dose of Covid vaccine; 17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently; 17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently; This spontaneous case was reported by a nurse and describes the occurrence of INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (Moderna 0.25ml given instead of Pfizer 0.5ml for 2nd dose of Covid vaccine), PRODUCT ADMINISTERED TO PATIENT OF INAPPROPRIATE AGE (17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently) and ACCIDENTAL UNDERDOSE (17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently) in a 17-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 065F21A) for COVID-19 vaccination.    Co-suspect product included non-company product TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) for an unknown indication.    Concurrent medical conditions included ADHD since 06-Oct-2015, Social anxiety disorder since 30-Oct-2019 and Clostridioides difficile infection (Treated with 2 courses of Vancomycin and probiotic) since 23-Sep-2021. Concomitant products included METHYLPHENIDATE from 03-Sep-2021 to an unknown date for ADHD, ETHINYLESTRADIOL, LEVONORGESTREL (LEVONORGESTREL AND ETHINYL ESTRADIOL) from 29-Sep-2021 to an unknown date for Birth control, VANCOMYCIN from 12-Oct-2021 to an unknown date for Clostridium difficile infection.   On 22-Sep-2021, the patient received first dose of TOZINAMERAN (PFIZER BIONTECH COVID-19 VACCINE) (unknown route) 1 dosage form. On 17-Nov-2021 at 4:15 PM, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 17-Nov-2021, the patient experienced INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (Moderna 0.25ml given instead of Pfizer 0.5ml for 2nd dose of Covid vaccine), PRODUCT ADMINISTERED TO PATIENT OF INAPPROPRIATE AGE (17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently) and ACCIDENTAL UNDERDOSE (17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently). On 17-Nov-2021, INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (Moderna 0.25ml given instead of Pfizer 0.5ml for 2nd dose of Covid vaccine), PRODUCT ADMINISTERED TO PATIENT OF INAPPROPRIATE AGE (17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently) and ACCIDENTAL UNDERDOSE (17 year old received 0.25 ml of moderna vaccine/but Moderna was given inadvertently) had resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No treatment medications were provided. Reporter stated that patient took Vancomycin 125 mg 4 times daily for 10 days, then 125 mg twice daily for 7 days, then 125 mg daily for 7 days, then 125 mg every 2 days for 4 weeks  Reporter also stated that the patient was waited the appropriate 15 minutes and was monitored, no adverse symptoms noted.   Most recent FOLLOW-UP information incorporated above includes: On 22-Nov-2021: Patient's demographics, medical history and concomitant medications were updated.