Antidote for overdoses of gemcitabine is unknown. When a single dose as high as 5700 mg/m2 was administered by I.V. infusion over 30 minutes every 2 weeks to several patients in a Phase 1 study the principle toxicities seen were myelosuppression, paresthesia and severe rash. Monitoring of appropriate blood counts and supportive therapy for patient, as necessary should be given if overdose is suspected.