What are the main gastrointestinal and renal safety considerations when prescribing NSAIDs?

• A. GI bleed risk, peptic ulcers; renal impairment and electrolyte disturbances; monitor renal function and BP.
• B. Hepatotoxicity and ascites.
• C. QT prolongation unrelated to dosage.
• D. Sleep disturbances.

Answer: (A)

NSAIDs work by blocking prostaglandin synthesis through cyclooxygenase inhibition, and that has direct consequences for the GI tract and the kidneys. Prostaglandins help protect the stomach lining and maintain blood flow to the kidneys. When their production is reduced, the gastric mucosa becomes more susceptible to injury, increasing the risk of gastritis, peptic ulcers, and GI bleeding. At the same time, reduced prostaglandin-mediated dilation of the afferent arteriole can lower renal perfusion and GFR, leading to renal impairment and potential electrolyte disturbances, especially in people who are older, dehydrated, or have preexisting kidney disease, heart failure, or are taking other nephrotoxic drugs.

That’s why the main safety considerations when prescribing NSAIDs revolve around GI bleed risk and peptic ulcers, along with renal impairment and related electrolyte changes. Clinically this means watching for GI symptoms such as dyspepsia, black or tarry stools, or coffee-ground emesis, and monitoring renal function (creatinine/eGFR) and blood pressure, since NSAIDs can also cause salt and water retention and hypertension.

In practice, clinicians try to minimize risk by using the lowest effective dose for the shortest duration, assessing patient-specific risk factors (age, prior ulcers, concurrent anticoagulants or steroids, CKD, dehydration), and considering gastroprotection or alternative analgesics when appropriate. While hepatotoxicity, QT changes, or sleep disturbances can occur with various drugs, they are not the primary safety concerns with NSAIDs in routine use.