[Antihistaminic effect of a hydrogel with the components diphenhydramine, N,N-diethyl-m-toluamide and phthalic acid dimethyl ester].

The combination of the antihistamine diphenhydramine as well as the repellents N,N-diethyl-m-toluamide and dimethylphthalate as the active constituents of an insect repellent (Pellit) guarantees a remarkable antihistaminic effect. Surprisingly the repellent N,N-diethyl-m-toluamide proved itself to be an antihistamine. The UV-erythema model was used on the dorsal skin of male volunteers.