Unchanged sensitivity to electric shock in L-tryptophan treated rats

Injections of L-tryptophan (50, 100 and 200 mg/kg) i.p. in rats resulted in dose dependent increases in brain concentrations of tryptophan, 5-hydroxytryptamine and 5-hydroxyindoleacetic acid. Sensitivity to electric shock as measured by flinch and jump thresholds was not changed by L-tryptophan 100 and 200 mg/kg. The results indicate that increased 5-HT turnover does not influence sensitivity to electric shock.