Table of Contents
Antiemetics are medications used to prevent or treat nausea and vomiting, common symptoms associated with various medical conditions and treatments. Pharmacy technicians play a crucial role in understanding these drugs to assist pharmacists effectively. Here are the top 10 antiemetics every pharmacy technician should know.
1. Ondansetron
Ondansetron is a serotonin 5-HT3 receptor antagonist widely used to prevent nausea and vomiting caused by chemotherapy, radiation therapy, and surgery. It is available in oral, injectable, and dissolvable forms.
2. Promethazine
Promethazine belongs to the phenothiazine class and works as a dopamine antagonist. It is effective for nausea related to allergies, motion sickness, and postoperative states. Caution is advised due to its sedative effects.
3. Metoclopramide
Metoclopramide enhances gastric motility and is used to treat nausea caused by gastroparesis, chemotherapy, and migraines. It has central dopamine antagonist properties and may cause neurological side effects.
4. Dimenhydrinate
Dimenhydrinate is an antihistamine effective against motion sickness and vertigo. It has sedative properties and is available over the counter in various formulations.
5. Meclizine
Meclizine is another antihistamine used primarily for vertigo and motion sickness. It has a longer duration of action compared to dimenhydrinate and is available OTC.
6. Aprepitant
Aprepitant is a neurokinin-1 (NK1) receptor antagonist used in combination with other antiemetics to prevent chemotherapy-induced nausea and vomiting. It is administered orally.
7. Doxylamine
Doxylamine is an antihistamine often combined with pyridoxine (vitamin B6) in prescribed formulations for nausea during pregnancy. It has sedative effects and is available OTC for motion sickness.
8. Scopolamine
Scopolamine is a muscarinic receptor antagonist used as a transdermal patch to prevent motion sickness and postoperative nausea. It reduces vestibular stimulation that causes nausea.
9. Dolasetron
Dolasetron is a serotonin 5-HT3 receptor antagonist similar to ondansetron, used to prevent nausea and vomiting from chemotherapy. It is available in oral and injectable forms.
10. Haloperidol
Haloperidol is an antipsychotic that also has antiemetic properties, particularly in refractory nausea cases. It acts as a dopamine antagonist and is used under medical supervision due to potential side effects.