Neurochemistry is the analysis of organic compounds, neurotransmitters and neuro-migration and pathfinding. It includes amino acids and their combinations such as dipeptides (two amino acids), tripeptides (three amino acids), polypeptides (short chains) and proteins (long chains).
Neurochemistry is needed to understand the mechanisms of neurotransmitters, drugs, alcohol and medications. It also help provide the medications to treat many disorders and conditions.