A double blind study of the influence of dipropylacetate on behaviour

The influence of dipropylacetate (D.P.A.) on behaviour was studied in 20 patients using a double blind cross over trial. 5 patients were rated as improved on D.P.A., 6 on placebo, 3 as deteriorated on D.P.A., 3 on placebo, 12 as unchanged on D.P.A. and 11 on placebo. This study gives us no reason to believe that D.P.A. exerts a psychotropic action within 3 weeks which is better than a placebo effect.