Jan 21, 2021 · Ascor ® (Ascorbic Acid Injection, USP). Ascor ® is McGuff Pharmaceuticals Inc.'s branded formula of Ascorbic Acid Injection, USP.. Ascor ® is vitamin C indicated for the short term (up to 1 week) treatment of scurvy in adult and pediatric patients age 5 months and older for whom oral administration is not possible, insufficient or contraindicated.