Motrin (Ibuprofen) for Stomach Bug: When It Helps and When It Harms

Generally avoid ibuprofen during acute gastroenteritis. Reasons:

• NSAIDs irritate gastric mucosa—worsens nausea, pain, risk of gastritis/ulcer.
• Antiplatelet effect (reversible COX-1 inhibition) may increase bleeding if mucosal erosion present.
• Renal perfusion already compromised by dehydration; NSAIDs constrict afferent arterioles → risk of acute kidney injury.

When It Might Be Acceptable

• High fever (>39°C / 102°F) or severe myalgia/arthralgia without active vomiting/diarrhea.
• Patient well-hydrated, no GI bleeding history, not on anticoagulants/other NSAIDs.
• Short course, lowest effective dose, with food.

Better Alternatives for Fever/Pain

• Acetaminophen (paracetamol)—minimal GI/renal risk at therapeutic doses.
• Non-drug: tepid sponging, hydration, rest.

Supportive Care Priorities

• Oral rehydration solution (ORS) – primary therapy.
• Small, frequent bland meals (BRAT diet outdated; resume normal diet as tolerated).
• Avoid caffeine, alcohol, spicy/fatty foods.
• Medical review if symptoms >48h, bloody stool, high fever, signs of dehydration.