[Evaluation of the effect of the antihistaminic preparations dimebon and diprazin on embryogenesis in rats].

A single administration of dimebon (800 mg/kg) to rats per os (2/3 of the LD50 isoeffective for females) raises the preimplantation death, whereas pipolphen increases the intrauterine lethality and inhibits the development of fetuses. Pipolphen in a dose of 175 mg/kg and dimebon in doses of 300-150 mg/kg (exceeding 25- and 300-150-fold, respectively, the therapeutic dose for man) do not exert any specific embryotropic action.