Antihimetinics drug hand written notes pdf

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Antiemetics are a class of drugs that are used to prevent or treat nausea and vomiting. They work by interfering with the receptors in the brain and digestive system that are responsible for triggering the vomiting reflex.

There are several different types of antiemetic drugs, each with their own mechanisms of action and side effects. Some of the most common classes of antiemetic drugs include:

1. Dopamine antagonists: These drugs work by blocking dopamine receptors in the brain, which reduces nausea and vomiting. Examples of dopamine antagonists include metoclopramide and prochlorperazine.

2. Serotonin antagonists: These drugs block serotonin receptors in the digestive system, which can reduce nausea and vomiting. Examples of serotonin antagonists include granisetron and ondansetron.

3. Antihistamines: These drugs block histamine receptors in the brain and digestive system, which can reduce nausea and vomiting. Examples of antihistamines include dimenhydrinate and meclizine.

4. Cannabinoids: These drugs act on the cannabinoid receptors in the brain, which can reduce nausea and vomiting. One example of a cannabinoid drug is dronabinol.

Antiemitics can be prescribed to people undergoing chemotherapy, radiation therapy, or surgery. They can also be used to treat nausea and vomiting caused by motion sickness, viral infections, or other medical conditions.

It is important to note that antiemetics can have side effects, including drowsiness, dizziness, dry mouth, and constipation. It is also possible to develop a tolerance to some antiemetic drugs over time. Therefore, it is important to take these drugs only as directed by a healthcare provider.
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