Association between lipid-lowering agents and severe hyponatremia: a population-based case-control study

Area of Science:

• Pharmacology
• Clinical Medicine
• Epidemiology

Background:

• Drug-induced hyponatremia is a common clinical issue, with numerous drug classes implicated.
• Lipid-lowering agents, including statins, are widely prescribed, yet their association with hyponatremia is not fully understood.
• Existing data on statins suggests a potential inverse relationship with hyponatremia, but evidence for other lipid-lowering drugs is lacking.

Purpose of the Study:

• To investigate the association between the use of various lipid-lowering drugs and hospitalization due to hyponatremia.
• To determine if lipid-lowering agents are potential causes or protective factors in severe hyponatremia.
• To provide evidence for the safe prescription of lipid-lowering drugs in patients with or at risk of hyponatremia.

Main Methods:

• A register-based case-control study utilizing the Swedish general population.
• Inclusion of 11,213 patients hospitalized for hyponatremia and 44,801 matched controls.
• Multivariable logistic regression analysis adjusted for relevant confounding factors including co-medications, diseases, and socioeconomic status.

Main Results:

• Adjusted analysis revealed an inverse association between statin use (OR 0.69, 95% CI 0.64-0.74) and ezetimibe use (OR 0.60, 95% CI 0.41-0.86) with hospitalization for hyponatremia.
• Fibrates (OR 0.87, 95% CI 0.51-1.42) and resins (OR 1.21, 95% CI 0.69-2.06) did not show a significant inverse association after adjustment.
• These findings suggest that statins and ezetimibe are unlikely to cause hyponatremia.

Conclusions:

• The use of statins and ezetimibe is inversely correlated with severe hyponatremia.
• These lipid-lowering drugs are unlikely culprits in patients presenting with hyponatremia.
• Further research is warranted to explore the potential protective mechanisms of statins and other lipid-lowering drugs in dysnatremias.