Folinic acid rescue for vincristine toxicity.

Inadvertent vincristine sulfate overdosage was treated with folinic acid. The sequence of development of the signs and symptoms associated with known vincristine toxicity was accentuated; however, the duration of these toxicities was markedly compressed in time when compared with previous reports. The known pharmacologic and biologic activities of vincristine sulfate and presumed mechanism of counteractivity of folinic acid is presented.