[The antiradiation effect of the cytostatic ribamidil and the possible mechanisms of its action].

Ribamidil has a cytostatic effect on bone marrow cells and a radioprotective therapeutic action. Ribamidil favors CFUs proliferation and does not interfere with the process of CFUs migration.

[Radioprotective properties of oxolinic acid].

Oxolinic acid was shown to produce a radioprotective effect on mice and a therapeutic radioprotective action on rats and hamsters. As to radioprotective efficiency, oxolinic acid is inferior to such known sulfur-containing agents as indolylalkylamines and alpha-adrenomimetics. But oxolinic acid has an important advantage over them, that is, the increase in radioresistance it induces persists for several hours.

[Radioprotective activity of hypotensive preparations].

In experiments on (CBA X C57B1)F1 mice a study was made of the radioprotective efficiency of some hypotensive drugs. Hemiton administered in different ways, within a wide dose range and at different times before irradiation was shown to possess a pronounced protective action. The substitution of the acid residue in hemiton decreased its activity.