From the School of Medical Sciences, Tarbiat Modarres University, P.O .Box 14155-4838, Tehran, IslamicRepublic of Iran.
Abstract: (3929 Views)
The hematopoietic syndrome is anticipated when a dose of radiation greater than
100 cGy is received. The resulting clinical situation is life-threatening because of
opportunistic infections and gradual decline in immune competency due to irradiation.
Because of evidence of a possible immunomodulatory role for cimetidine, an
antagonist of histamine H2 receptors, we studied the effects of this drug on radiationinduced
lymphohematopoietic changes. The results obtained in this study indicate
that cimetidine is effective in the reduction of radiation-induced injuries with a dose
reduction factor of greater than 1.5. Therefore, it might be useful as a radioprotector
for low doses of radiation usually used for radiation therapy.