The skeptical cardiologist stopped writing new prescriptions for niacin extended release tablets in 2011. For any patient who was taking niacin, I recommended stopping it.
Because niacin had favorable effects on the cholesterol profile, physicians had been utilizing it for many years in high risk patients on statins who had low HDL (good cholesterol) and/or high triglycerides.
The rationale was that, since high HDL was associated with lower risk of heart attacks, raising the HDL would lower that risk. Similarly, lowering the triglycerides would improve cardiovascular risks.
While niacin certainly improved the cholesterol profile, there was no good evidence that starting it in a patient already on statin would improve cardiovascular outcomes. The cholesterol profile is a surrogate endpoint: the actual treatment goal is reducing cardiovascular disease.
In 2011, the AIM-HIGH study proved there was no benefit to adding niacin to good statin therapy despite increasing HDL from 35 to 42 mg/dl, lowering triglycerides and lowering LDL. This and other studies showing no benefit of niacin therapy (and worrisome adverse effects) should have resulted in the total cessation of niacin prescriptions, especially in patients on statins.
Unfortunately, old habits die hard amongst physicians, and the allure of raising HDL and lowering triglycerides with niacin persisted despite a lack of evidence of any benefit in lowering cardiovacular risk.
Yesterday, the FDA announced it was removing from the market two drugs made by Abbvie, Advicor and Simcor, which are combinations of extended release niacin plus lovastatin or simvastatin, and removed its approved indication for niacin ER plus statin for lowering CHD risk stating:
“Based on the collective evidence from several large cardiovascular outcome trials (Refs. 1-3), the Agency has concluded that the totality of the scientific evidence no longer supports the conclusion that a drug-induced reduction in triglyceride levels and/or increase in HDL-cholesterol levels in statin-treated patients results in a reduction in the risk of cardiovascular events. Consistent with this conclusion, FDA has determined that the benefits of niacin ER tablets and fenofibric acid DR capsules for coadministration with statins no longer outweigh the risks, and the approvals for this indication should be withdrawn.”
This is good news for patients whose physicians were keeping them on the unproven brand name combination drugs, Advicor and Simcor.
There are still legitimate uses of niacin to prevent vitamin deficiencies but If you are still taking some form of niacin ER for the purpose of preventing heart disease with or without a statin I recommend presenting your doctor with the link to the FDA pronouncement above and having a good discussion with him about the rationale for staying on it.
The other drug mentioned in the announcement, fenofibric acid, is far less often prescribed and is not available as a combination. It is the most effective drug we have for extremely high triglyceride levels over 500 mg/dl which can cause pancreatitis. I have a few patients on the generic fenofibric acid strictly for the purpose of lowering their dangerously high triglycerides but not for the indication of lowering their cardiovascular risk.