[Protective effects of d-chlorpheniramine maleate pre-treatment against acute side effects of Irinotecan(CPT- 11)].

: It is wellknown that cholinomimetic side effects, such as sedation, abdominal pain, nasal flow and watery eyes, may develop in patients in the early stage of Irinotecan (CPT-11) administration; however, there have been no investigations concerning methods for preventing the development of these side effects. To assess the protective effects of pre-treatment with d-CM on cholinomimetic side effects in the early stage after Irinotecan (CPT-11) administration, we prescribed d- Chlorpheniramine maleate (d-CM) to a group of patients prior to Irinotecan (CPT-11) administration. Twenty members from the group of non-d-CM-treated patients (n=39) and 4 members from the group of treated patients (n=20) complained of side effects. The pre-administration of d-CM significantly reduced the number of patients with side effects (p<0.05). The relative risk (RR) for the frequency of side effects was 0.39 (95% CI; 0.15-0.98), demonstrating that the frequency of side effects was significantly reduced. Based on theses findings, we concluded that the pre-administration of d-CM had protective effects against side effects that might develop in the early stage after Irinotecan (CPT-11) administration.