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Olanzapine, sold under the brand name Zyprexa among others, is an atypical antipsychotic primarily used to treat schizophrenia and bipolar disorder. [13] It is also sometimes used off-label for treatment of chemotherapy-induced nausea and vomiting [14] and as an appetite stimulant. [15]
Uncommon adverse effects of olanzapine, occurring from 0.1–1%, include: Leukopaenia a comparatively low white blood cell (the cells that defend the body from foreign invaders) count. Neutropaenia a reduced neutrophil (the white blood cells that kill bacteria) count. Bradycardia (low heart rate)
Antipsychotic drugs such as haloperidol and chlorpromazine tend to block dopamine D 2 receptors in the dopaminergic pathways of the brain. This means that dopamine released in these pathways has less effect. Excess release of dopamine in the mesolimbic pathway has been linked to psychotic experiences. Decreased dopamine release in the ...
Brain Structure. Brain function and structure may also play a role in bipolar disorder, but researchers know very little about this. ... (brain chemicals) like dopamine and serotonin. But this isn ...
Dopamine receptor flow chart. Dopamine receptors are all G protein–coupled receptors, and are divided into two classes based on which G-protein they are coupled to. [1] The D 1-like class of dopamine receptors is coupled to Gα s/olf and stimulates adenylate cyclase production, whereas the D 2-like class is coupled to Gα i/o and thus inhibits adenylate cyclase production.
The atypical antipsychotics (AAP), also known as second generation antipsychotics (SGAs) and serotonin–dopamine antagonists (SDAs), [1] [2] are a group of antipsychotic drugs (antipsychotic drugs in general are also known as tranquilizers and neuroleptics, although the latter is usually reserved for the typical antipsychotics) largely introduced after the 1970s and used to treat psychiatric ...
Dopamine is also synthesized in plants and most animals. In the brain, dopamine functions as a neurotransmitter—a chemical released by neurons (nerve cells) to send signals to other nerve cells. Neurotransmitters are synthesized in specific regions of the brain but affect many regions systemically.
Dopamine receptors can also transactivate Receptor tyrosine kinases. [19] Beta Arrestin recruitment is mediated by G-protein kinases that phosphorylate and inactivate dopamine receptors after stimulation. While beta arrestin plays a role in receptor desensitization, it may also be critical in mediating downstream effects of dopamine receptors.