FENFLURAMINE IS AN INDIRECT-ACTING SYMPATHOMIMETIC RELATED TO AMPHETAMINE, BUT AT STANDARD DOSES IT USUALLY DEPRESSES RATHER THAN STIMULATES THE CNS. IT APPEARS TO STIMULATETHE RELEASE OF SEROTONIN AND SELECTIVELY INHIBITS ITS REUPTAKE RESULIING IN INCREASED CNS SEROTONIN CONCENTRATIONS. IT MAY ALSO INCREASE GLUCOSE UTILISATION AND LOWER BLOOD-GLUCOSE CONCENTRATIONS.