Losartan and Myopathy: Evidence Assessment

Safety Profile of Losartan

• The European Society of Cardiology recommends that ARBs like losartan have a favorable side effect profile compared to ACE inhibitors, with significantly fewer side effects, particularly cough 1, 2.
• In the majority of studies, mainly conducted in hypertension, the side effect profile of ARBs is comparable to placebo 1.
• The American College of Cardiology notes that common side effects of losartan do not include myopathy; the most commonly reported adverse effects are related to hypotension, renal function changes, and hyperkalemia 2, 3.

Monitoring Recommendations

• The European Society of Cardiology suggests that while monitoring renal function is essential with ARBs, there are no specific recommendations for monitoring muscle enzymes or symptoms with losartan therapy 1, 3.
• The American College of Cardiology recommends that current guidelines for losartan use do not list myopathy as a known adverse effect requiring monitoring 3, 5.

Clinical Implications

• The European Society of Cardiology advises that when prescribing losartan, standard monitoring should focus on blood pressure, renal function, and potassium levels rather than muscle enzymes or symptoms 1, 3.