Alcohol raises serotonin levels in the short term, but repeated usage lowers serotonin levels, because alcohol causes the brain to eventually run out of serotonin.
This is an incredibly broad question. The basic theory is that many drugs force there to be an excess of serotonin in the synapse of a neuron, by either stopping the re-uptake of it (antidepressants)...
It all depends on the drug. Every drug affects your body differently. Certain drugs affect the nervous system, and some do not. From my understanding it all depends on how you take the drug too. For...
Alcohol actually affects the whole brain; it's proven that alcohol will shrink a drinker's brain over time. Short term, however, affect the frontal lobes (which are involved in speach, muscle...
It affects your concentration, Shortens attention span Impairs judgment (if something is a good idea or not) Your reflexes are really slowed...which is another effect), Makes it harder to remember...