Tests set up on mice and rats brought evidence that spironolactone, progesterone, testosterone-propionate, methylandostendiol, desoxycorticosterone-acetate, methyltosterone, diethylstilbestrol, preparation PCN, megesterol-acetate and mestranol disply a catatoxic action, whose degree depends upon the method of evaluation and the animal species. A pattern for selection of catatoxic agents is proposed and some aspects of their mode of action are discussed.
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