“…This suggests that the inhibitor does not further accumulate in the brain after the first few days, presumably reflecting a rapid metabolism to amphetamine and methamphetamine (Reynolds, Elsworth, Blau, Sandler, Lees & Stern, 1978). These results are consistent with those of , who show no clinically significant change in tolerance to tyramine after 18 months treatment and they serve to underline the safety of the drug in clinical practice (Birkmayer et al, 1977;Lees et al, 1977 Received October 8,1979 …”