I have been finding that it may reduce dopamine...

Benzodiazepines, barbiturates and alcohol all act on GABA, and chronic use down-regulates and modify the GABA receptors, which in turn causes dependence. With continued use of Benzodiazepines, the calming effect of GABA is diminished while the excitatory neurotransmitter Glutamate, is increased. Glutamate is always an excitatory neurotransmitter, and GABA is what counters this action. As GABA is initially enhanced by Benzodiazepines, the brain’s output of excitatory neurotransmitters, including Norepinephrine (noradrenalin), Serotonin, Acetyl Choline and Dopamine are reduced. These neurotransmitters are necessary for alertness, muscle tone, coordination, memory, emotional responses, endocrine gland hormones, heart rate, blood pressure control and other functions. As a result, all these may be impaired by Benzodiazepines.

Point of No Return website (for info above)