Crisvin 1 mg Injection (Vincristine) — Chemotherapy for Cancer Treatment Crisvin 1 mg Injection contains vincristine, a potent chemotherapy medication from the vinca alkaloid class used in the treatment of various cancers including leukaemias, lymphomas, and select solid tumours. It works by interfering with the ability of cancer cells to divide, helping slow tumour growth and improve response when used in combination with other anticancer agents. Administered as an intravenous infusion or injection by trained oncology professionals in a clinical setting, Crisvin requires close monitoring for side effects such as nerve damage (neurotoxicity), low blood counts, and constipation. Due to its specialized use and potential toxicity, Crisvin 1 mg is available in Pakistan through licensed oncology pharmacies with a valid prescription and should be used under the guidance of an oncologist.