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)
A psychoactive drug or psychotropic substance is a chemical that alters brain function, resulting in temporary changes in perception, mood, consciousness, or behaviour.
There are many ways in which psychoactive drugs can affect the brain.
Here is a general breakdown of the ways psychoactive drugs can work.
Eventual substance use disorders associate with a significant increase in morbidity and mortality, and substance dependence is estimated to indirectly or directly associate with at least 40% of hospital admissions and 25% of all deaths in the USA (APA 1995).
The criteria for psychoactivesubstance dependence are similar for all psychoactivesubstances and include nine items, at least three of which must be fulfilled for a minimum duration of 1 month for a diagnosis.
Substance use disorders and their psychiatric comorbidity have been extensively studied in the general population (Helzer and Pryzbeck 1988, Kessler et al 1994, 1996), and are seen as a challenge in developing health care services, especially psychiatric care (Regier et al 1993, Osher and Drake 1996).
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