Summary of the major biochemical effects that drugs may have at the synapse:

1. Precursor compounds
2. Synthesis blockade
3. Transmitter depletion
4. Prevention of release
5. Receptor inhibition
6. Mimicking
7. Inactivation blockade
8. Reuptake blockade
9. False transmitters (+)
10. False transmitters (-)
11. Conduction blockade
    

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