After subcutaneous administration in equimolar, close to therapeutic, doses accumulation of 1-14C-PANTOGAB exceeds accumulation of 1-14C-GABA in the brain areas only at early stages of observations: 7.5 and 15 min. In blood at all the time except for 4 h, the amount of 1-14C-PANTOGAB exceeds essentially the content of 1-14C-GABA. Maximum of 14C-PANTOGAB accumulation in the brain is observed 30 min later and that of 14C-GABA by 60 min. Difference in distribution of both preparations between the brain areas are inconsiderable. In the period of maximum accumulation there is a tendency to a more intensive 1-14C-PANTOGAB incorporation into the cerebellum, and 1-14C-GABA into truncus cerebri. The dynamics of accumulation in the brain and removing of the studied compounds from blood evidences for better absorption from the place of administration and for a weaker biotransformation of PANTOGAB as compared to GABA.