The fate of 2‐phenethylamino‐1‐phenylethanol,2‐14C was determined following i.p. administration to rats. Little if any radioactivity was detected in tissue samples 2 days after dosage. The radioactivity was eliminated primarily in the urine. Recovery amounted to 91 % in the urine and 6.8 % in the feces after 3 days. The radioactivity in the urine was due to the administered compound. LD50 determination and in vivo MAO inhibition are also reported. Copyright © 1969 Wiley‐Liss, Inc., A Wiley Company