Desipramine hydrochloride (Standard) is a reference standard for research and analysis in studies involving Desipramine hydrochloride. Desipramine hydrochloride (Norimipramine) ,a secondary amine tricyclic antidepressant (TCA), is the hydrochloride salt form of desipramine. In the central nervous system (CNS), Desipramine hydrochloride blocks the re-uptake of neurotransmitters, including norepinephrine and serotonin. This leads to an increase in the amount of these neurotransmitters in the synaptic cleft and prolongs their activities postsynaptically.