The general and some pharmacological actions of DWP 305 were investigated in animals and the following results were obtained. In central nervous system, DWP 305 had no effects on the pentobarbital induced anaesthesia, locomotor activity, rotarod test, traction test, analgesic action in mice and body temperature in rat. DWP 305 showed no depressive action on convulsion induced by strychnine, electronic shock and pentylenetetrazole. From these results, DWP 305 was considered to have no pharmacological effect on the central nervous system. Furthermore, DWP 305 had no influences on the normal blood pressure and heart rate. In the isolated ileum of guinea pig, DWP 305 inhibited contrastive effects against the acetylcholine (10^(-6)g/㎖), histamine (10^(-6)g/㎖), 5-hydroxytryptamine (10^(-6)g/㎖) and BaCl₂ (10^(-4)g/㎖) at a concentration of 2.15 X 10^(-4)g/㎖ in bath. In the isolated trachea and vas deference, DWP 305 showed no effect on the contractions produced by histamine and norepinephrine, respectively. DWP 305 showed inhibitory effect on the contractions produced by acetylcholine and oxytocin at a concentration of 2.15 X 10^(-4)g/㎖ on the isolated nonpregnant rat uterus. DWP 305 had no effect on the isolated right atrium of guinea pig, bile excretion urine volume, pH, gastrointestinal motility, gastric secretion and blood aggregation.