indication

For the the treatment of depressive fatigue in convalescence and other debilitated states as well as in the treatment of depressive day-time fatigue, lack of concentration and lethargy.

pharmacology

Fencamfamine increases drive and mental alertness and an elevation of mood and a general feeling of well-being. It is a central nervous system stimulant, which increases locomotor activity.

mechanism of action

Fencamfamine acts as an indirect dopamine agonist. It releases dopamine by a similar mechanism to amphetamines, but is 10x less potent than dexamphetamine at producing this effect. The drug seems to inhibit the dopamine transporter (DAT) that removes dopamine from the synapses. This inhibition of DAT blocks the reuptake of dopamine and norepinephrine into the presynaptic neuron, increasing the amount of dopamine in the synapse. It also stimulates the release of dopamine and norepinephrine into the synapse. Finally, it increases the magnitude of dopamine release after a stimulus, increasing the salience of stimulus. Also unlike amphetamines, fencamfamine does not inhibit the action of monoamine oxidase enzymes and so is somewhat safer. Some experiments also suggest a role for opioid receptors in the activity of fencamfamine, as low doses can cause paradoxical sedation, and some effects of the drug are blocked by naloxone.

toxicity

Overdosage is characterised by nausea, agitation and restlessness, dryness of the mouth, dizziness and tremor. In gross overdosage the above symptoms may also be associated with dyspnoea, tachycardia, disorientation and convulsions.