Better patient information needed
Dr. Baigent called for better information in statin package inserts about the real risk for muscle symptoms with these drugs.
“We need to do a better job of communicating the real risk of muscle symptom to patients who are taking statins and to their doctors. At the moment, doctors often stop statins if patients complain of muscle pain, but our data show that in 14 out of 15 times, they would be wrong for doing that. Stopping the statin is nearly always a mistake,” he commented.
“At present, the package inserts include a whole load of rubbish from observational studies, which are completely unreliable,” he added. “This is of no value to patients. They go through this information and find several symptoms they are experiencing, which they attribute to the drugs. We really need to divide up the information into the evidence that we really know for sure and then the more speculative stuff.”
Dr. Baigent also highlighted the large benefits of statins, compared with the small risk for muscle symptoms.
“While statins may cause 11 patients per 1,000 to experience some mild muscle pain in the first year of taking these drugs, and this was reduced to none in subsequent years, statins, when used for the primary prevention of cardiovascular disease, prevent 25 cardiovascular events per 1,000 patients every year they are taken. And for secondary prevention this rises to 50 events prevented per 1,000 patients each year,” he noted.
The individual participant data meta-analysis involved 23 trials with information on almost 155,000 patients. All trials included at least 1,000 patients and at least 2 years of scheduled treatment. Adverse-event data were collected for all individual participants in 19 large randomized double-blind trials comparing statin therapy with placebo (123,940 patients) and in four randomized double-blind trials comparing more-intensive with less-intensive statin therapy (30,724 patients).
In the four trials of more-intensive versus less-intensive statin therapy, high-intensity regimens (atorvastatin 40-80 mg daily or rosuvastatin 20-40 mg daily) resulted in a larger relative increase in the rate of muscle pain or weakness than moderate-intensity regimens, with rate ratios of 1.08 (95% CI, 1.04-1.13) and 1.02 (95% CI, 1.00-1.05), respectively.
‘Reassuring information’
Discussant of the study at the ESC Hotline session, Erin Bohula, MD, Brigham and Women’s Hospital, Boston, said this new analysis had many strengths and used a rigorous approach to look at the issue of muscle symptoms with statins.
She pointed out some challenges, including the fact that the definition of adverse muscle events has changed over time and differed in the various trials, with heterogeneous data capture across trials. “So, this was a Herculean task to harmonize this very complicated dataset.”
Dr. Bohula concluded: “I think this is a very significant undertaking, resulting in a rich dataset that enhances our understanding of muscle symptoms related to statin use. The take-home for me is that muscle symptoms are a common complaint in the general population but are very rarely attributable to statins. This is very reassuring to me, and I hope it is reassuring to patients and can help us encourage them with adherence, given the clear cardiovascular benefits of statins.”
Chair of the ESC Hotline session at which the study was presented, Gabriel Steg, MD, Hôpital Bichat, Paris, asked whether some statin patients who experienced muscle symptoms with the drugs in active run-in periods in the trials may have been excluded from the main trials, so that this information might not have been captured, but Dr. Baigent replied that they also examined those data, which had been accounted for in the analysis.
“That’s really good news,” Dr. Steg commented. “This study is going to be one more tool in our response to statin skeptics and I think, as such, this work is a really a service to public health.”
The meta-analysis was funded by the British Heart Foundation, the U.K. Medical Research Council, and the Australian National Health and Medical Research Council.
A version of this article first appeared on Medscape.com.