Which antiemetic is considered safe to administer in porphyria management?

Which antiemetic is considered safe to administer in porphyria management?

• A. Ondansetron
• B. Metoclopramide
• C. Promethazine
• D. Prochlorperazine

Answer: (A)

In porphyria, some drugs can trigger acute attacks by inducing hepatic ALA synthase and increasing porphyrin precursor production. The antiemetic with a proven safe profile in porphyria management is ondansetron, a 5-HT3 receptor antagonist. It does not stimulate the porphyrin synthesis pathway, so it’s the preferred choice to control nausea without risking a porphyria attack. Promethazine and prochlorperazine are phenothiazines and have porphyrinogenic potential, so they’re avoided. Metoclopramide’s safety in porphyria is less clear, so it’s not the recommended option here.

In porphyria, some drugs can trigger acute attacks by inducing hepatic ALA synthase and increasing porphyrin precursor production. The antiemetic with a proven safe profile in porphyria management is ondansetron, a 5-HT3 receptor antagonist. It does not stimulate the porphyrin synthesis pathway, so it’s the preferred choice to control nausea without risking a porphyria attack.

Promethazine and prochlorperazine are phenothiazines and have porphyrinogenic potential, so they’re avoided. Metoclopramide’s safety in porphyria is less clear, so it’s not the recommended option here.