<prompt> Radioprotective drugs isare :AmifostineCyclophosphamideMethotrexatePaditaxe!  <response>: Ans: A Amifostine Radio Protective DrugsAmifostine VVR 2721 has free SH group which scavenge the free radicals produced due to radio therapy.Free radical scavenger agents such as sulphydryl - containing compounds tend to make cells more resistant. They have also been shown to reduce chromosome abnormalities associated with radiation. This suggests a potential use in reducing treatment induced cancers. The thiol containing drug amifostine WR 2721 is the best studied drug of this type. Randomized trial has shown that amifostine reduce treatment related toxicities, including radiation induced parotid damage xerostmia dsplatin induced nephrotoxicity - Devita 7th 275Also used for reducing SE of radiomimeticdrug dsplatinAntiradiation agent for astonanats.Radioprotective agents are - Amifostine WR 2721 IL-1 Zinc Oxide GM-CSF Pentoxyphyiline Etramustine Chlorhexidine KI Melatonin Antioxidant vit C, E, AFactors RadiosensitivityHypoxic environmentSlow or no divisionS-phase of cell cycleRadiation protectors AmifostineChemotherapeutic agents are radiosensitizer not radioprotecter 