A patient taking sulfasalazine reports persistent diarrhea and vomiting after two weeks. What instruction is most appropriate?

• A. Stop the medication immediately.
• B. Increase the length of time between each dose.
• C. Take the medication on an empty stomach.
• D. You will probably need a higher dose

Answer: (B)

GI intolerance from sulfasalazine often shows up as diarrhea and vomiting. A simple, effective way to improve tolerance is to space out the doses, giving the gut more time to recover between administrations. Lowering the exposure per sitting can reduce irritation without changing the total daily amount, so you can continue treating the underlying condition while addressing the side effects. Stopping the medication abruptly isn’t ideal because it interrupts therapy, taking it on an empty stomach can worsen GI upset, and increasing the dose would likely worsen the symptoms. If symptoms persist despite spacing out doses, contact the provider for guidance.