1. Depression
... is said to cause depression while over-abundance causes mania. Serotonin is known to affect norepinephrine levels. This is why some anti-depressant drugs mainly work at creating equilibrium in serotonin levels. Dopamine is associated with the reward or reinforcement that we get which induces us to continue doing a certain activity. The neurotransmitter is associated with addiction and ... substances such as cocaine, opiates, and alcohol stimulate it's production. This explains why some people who are suffering from depression subconsciously turn to drugs or alcohol as a ... much or too...
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