A psychoactive drug or psychotropic substance is a chemical that alters brain function, resulting in temporary changes in perception, mood, consciousness, or behaviour. Such drugs are often used for recreational and spiritual purposes, as well as in medicine, especially for treating neurological and psychological illnesses.
There are many ways in which psychoactive drugs can affect the brain. While some drugs affect neurons presynaptically, others act postsynpatically and some drugs don't even attack the synapse, working on neural axons instead. Here is a general breakdown of the ways psychoative drugs can work.
Prevent The Action Potential From Starting
Lidocaine, TTX (they bind to voltage-gated sodium channels, so no action potential begins even when a generator potential passes threshold)
Psychoactivedrugs are substances that can alter the consciousness, mood, and thoughts of those who use them.
Tobacco and alcohol in particular are major causes of death and disability in developed countries, and the impact of tobacco is expected to increase in other parts of the world.
A drug-dependent person may experience cravings for the drug and difficulty in controlling its consumption, suffer from withdrawal symptoms when use of the drug is reduced or discontinued, and need increasing doses of the drug to feel its effects (tolerance).
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