Little benefit from omega-3 fatty acids for intermittent claudication

Clinical question: 
How effective is omega-3 supplementation in people with intermittent claudication?
Bottom line: 
There was no evidence of consistently improved haematological results (triglycerides, total cholesterol, HDL, VLDL or LDL-cholesterol levels) or clinical outcomes (quality of life, pain-free or maximal walking distance, blood pressure, mortality, vascular events, ankle brachial pressure index or angiographic findings). There was some limited evidence that blood, but not plasma viscosity levels, decreased with treatment. Adverse effects, such as nausea, diarrhoea and flatulence, were observed in 2 studies.
Caveat: 
The studies were statistically and clinically heterogeneous in terms of dose, duration of therapy and placebo used. None of the studies used an inactive placebo. The duration of the studies ranged from 7 weeks to 2 years.
Context: 
Omega-3 fatty acids have been used in the treatment and prevention of coronary artery disease although current evidence suggests they may be of limited benefit. Peripheral arterial disease and coronary artery disease share a similar pathogenesis, so omega-3 fatty acids may have a similar effect on both conditions.
Review CD#: 
CD003833
PEARLS No: 
424
Date: 
March, 2014
Authored by: 
Brian R McAvoy