Medications used to treat chemotherapy overdose include levoleucovorin (Fusilev, Khapzory) and uridine triacetate (Vistogard). They work by either rescuing healthy cells from the toxic effects of chemotherapy or by neutralizing the overdose. Fusilev and Khapzory are typically given as injectable forms, while uridine triacetate is available as an oral granule. These treatments offer different ways to help manage the side effects of chemotherapy and improve your overall health.