“Daily injection of T3 during three consecutive days dose-dependently enhanced L-5-HTP (4 mg/kg)-induced head-twitches in mice.”
“Pretreatment with a sub-effective dose of T3 (0.06 mg/kg) markedly enhanced the ability of drugs acting mainly on noradrenergic systems (clenbuterol, desipramine, maprotiline and nomifensine) to increase the response to L-5-HTP.”
“These data suggest that the increased responsiveness to L-5-HTP caused by T3 involves an indirect (norepinephrine-mediated) rather than a direct effect on serotonergic processes.”