Patent ID: 8569324

Claim:
A method of enhancing radiotherapy effects for tumor treatment, consisting of: administering to a subject in need thereof an amount, effective for enhancing radiotherapy effects, of a pyridine compound represented by the formula (1): wherein R 1 , R 2 , and R 4 may be the same or different from one another and represent a hydrogen atom, hydroxy group, or protected hydroxy group, with the proviso that R 1 , R 2 , and R 4 are not all a hydrogen atom, and R 3 represents a halogen atom, amino group, carboxyl group, carbamoyl group, cyano group, nitro group, alkyl group having 1 to 6 carbon atoms, alkenyl group having 2 to 6 carbon atoms, or carbonyl group containing an alkoxy group having 1 to 6 carbon atoms; and irradiating said subject, thereby the effects of irradiation are enhanced.