Leucocin 50 mg Injection (Calcium Leucovorin) — Supportive Medicine in Chemotherapy Leucocin 50 mg Injection contains calcium leucovorin, the medically active form of folate used to support patients receiving cancer chemotherapy. This injectable medicine helps protect healthy cells from harmful effects of folic acid-blocking drugs such as methotrexate and is an essential part of many treatment protocols in oncology care. Leucocin must be administered by qualified healthcare professionals and is available in Pakistan at trusted online pharmacies in vial sizes from single units to multi-vial packs. Always use Leucocin under medical supervision with regular monitoring for optimum safety and effectiveness.