Question

Ondansetron is mainly used as _______

• A. Antiemetic
• B. Antidiabetic
• C. Antimalarial
• D. Antacid

Hint:

Ondansetron is a \(5-HT_3\) blocker used to prevent nausea and vomiting.

Answer 1

The Correct Option is A

Concept:
Antiemetics are drugs used to prevent or treat nausea and vomiting.

Step 1: Ondansetron is a \(5-HT_3\) receptor antagonist.

Step 2: It blocks serotonin receptors involved in vomiting reflex.

Step 3: It is especially useful in chemotherapy-induced nausea and vomiting.

Step 4: It is also used in postoperative nausea and vomiting.

Step 5: Therefore, ondansetron is mainly used as an antiemetic. \[ \boxed{\text{Antiemetic}} \]