📌 Introduction
Antiemetic drugs are used to prevent and treat nausea and vomiting. They act on the vomiting center and chemoreceptor trigger zone (CTZ). This topic is frequently asked in GPAT, DSSSB, and other pharmacy exams.
📝 MCQs
1. Vomiting center is located in:
A) Liver
B) Brainstem
C) Kidney
D) Heart
✔ Answer: B
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2. CTZ stands for:
A) Central treatment zone
B) Chemoreceptor trigger zone
C) Chemical transfer zone
D) Control trigger zone
✔ Answer: B
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3. 5-HT3 antagonists block:
A) Dopamine
B) Serotonin
C) Histamine
D) Acetylcholine
✔ Answer: B
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4. Example of 5-HT3 antagonist:
A) Ondansetron
B) Metoclopramide
C) Promethazine
D) Scopolamine
✔ Answer: A
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5. Dopamine antagonist example:
A) Metoclopramide
B) Ondansetron
C) Aprepitant
D) Meclizine
✔ Answer: A
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6. H1 blocker example:
A) Promethazine
B) Ondansetron
C) Domperidone
D) Aprepitant
✔ Answer: A
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7. Anticholinergic drug:
A) Scopolamine
B) Ondansetron
C) Metoclopramide
D) Domperidone
✔ Answer: A
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8. NK1 antagonist example:
A) Aprepitant
B) Ondansetron
C) Promethazine
D) Senna
✔ Answer: A
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9. Antiemetics act on:
A) Kidney
B) Liver
C) Brain & GI tract
D) Heart
✔ Answer: C
—
10. Motion sickness is treated by:
A) Scopolamine
B) Omeprazole
C) Insulin
D) Antibiotic
✔ Answer: A
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11. Ondansetron is used in:
A) Infection
B) Chemotherapy vomiting
C) Diabetes
D) Hypertension
✔ Answer: B
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12. Metoclopramide blocks:
A) Histamine
B) Dopamine
C) Serotonin only
D) Sodium
✔ Answer: B
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13. Common side effect:
A) Hypertension
B) Drowsiness
C) Diabetes
D) Fever
✔ Answer: B
—
14. Dry mouth is due to:
A) Anticholinergics
B) Antibiotics
C) Insulin
D) Vitamins
✔ Answer: A
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15. Antiemetics are used for:
A) Constipation
B) Nausea
C) Fever
D) Pain
✔ Answer: B
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16. CTZ is sensitive to:
A) Drugs & toxins
B) Oxygen
C) Glucose
D) Protein
✔ Answer: A
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17. Aprepitant blocks:
A) Dopamine
B) Substance P
C) Histamine
D) Acetylcholine
✔ Answer: B
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18. Vestibular system uses:
A) H1 blockers
B) PPIs
C) Antibiotics
D) Insulin
✔ Answer: A
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19. Which drug increases gastric motility?
A) Metoclopramide
B) Ondansetron
C) Aprepitant
D) Scopolamine
✔ Answer: A
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20. Best drug for chemotherapy nausea:
A) Ondansetron
B) Senna
C) Loperamide
D) Sucralfate
✔ Answer: A
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21. Which causes sedation?
A) Promethazine
B) Ondansetron
C) Aprepitant
D) Domperidone
✔ Answer: A
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22. Which drug acts centrally?
A) Antiemetics
B) Antibiotics
C) Vitamins
D) Insulin
✔ Answer: A
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23. Which drug is D2 blocker?
A) Domperidone
B) Ondansetron
C) Aprepitant
D) Promethazine
✔ Answer: A
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24. Which reduces vomiting reflex?
A) Antiemetics
B) Laxatives
C) Antibiotics
D) Insulin
✔ Answer: A
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25. Which drug used in pregnancy nausea?
A) Selected antiemetics
B) Antibiotics
C) Insulin
D) Vitamins only
✔ Answer: A
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26. Which drug blocks serotonin receptors?
A) Ondansetron
B) Metoclopramide
C) Scopolamine
D) Aprepitant
✔ Answer: A
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27. Which drug blocks muscarinic receptors?
A) Scopolamine
B) Ondansetron
C) Domperidone
D) Aprepitant
✔ Answer: A
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28. Which drug is non-sedative?
A) Ondansetron
B) Promethazine
C) Meclizine
D) Scopolamine
✔ Answer: A
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29. Which is first choice in motion sickness?
A) H1 blockers / anticholinergics
B) PPIs
C) Antibiotics
D) Insulin
✔ Answer: A
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30. Main function of antiemetics:
A) Increase vomiting
B) Prevent vomiting
C) Cause pain
D) Increase fever
✔ Answer: B
🎯 Conclusion
These MCQs help you revise antiemetic drugs effectively for exams.
👉 Read full notes here: https://pharmacymcq.in/antiemetic-drugs-classification-mechanism-uses-side-effects/