Which medication category is given preoperatively to decrease postoperative nausea and vomiting through multimodal receptor blockade?

• A. Antiemetics (Zofran, Reglan, Pepcid)
• B. Anxiolytics
• C. Opioids
• D. Local Anesthetics

Answer: (A)

Multimodal receptor blockade for preventing postoperative nausea and vomiting relies on using several drugs that block different parts of the body’s emetic signaling system before surgery. Antiemetics work by targeting multiple receptors known to drive nausea and vomiting. For example, blocking serotonin receptors with a drug like ondansetron, blocking dopamine receptors with metoclopramide, and even including an H2 blocker in some regimens helps dampen nausea signals from several angles. Because PONV arises from multiple pathways, using several agents that act on different receptors provides better prevention than a single drug. Anxiolytics mainly reduce anxiety and don’t directly interrupt the emetic pathways; opioids can actually worsen nausea, and local anesthetics don’t affect central nausea pathways. So the best choice is the antiemetic category.