To obtain an antiallergic agent having low toxicity and excellent safety by using a specific phosphoric acid diester compound (salt) as a component.
A phosphoric acid diester compound (salt) of the formula (R1 and R2 are each H or methyl) is used as a component of the objective agent. The compound is properly compounded with additives such as excipient, binder, disintegrant, dispersing agent, resorption promoter, buffering agent, surfactant, dissolution assistant, preservative, isotonizing agent, stabilizer and pH modifier and administered at a daily rate of 1-100 mg for adult in one dose in the case of injection or 10-1,000 mg per dose in several doses a day for adult in the case of oral administration. In the case of using the agent as an eye lotion, it is applied to the eye at a concentration of 0.01-0.5 (W/V)% at a rate of several drops at a time and several times a day.
SAKAGAMI YUKIHIRO
SAMEJIMA SHOGO
