Log in to your Fidelity Investments or NetBenefits accounts here. Log in to your Fidelity Investments or NetBenefits accounts here. This is a secure transaction.
When it's used as a treatment to increase your HDL cholesterol or correct a vitamin deficiency, niacin is sold in higher doses that are prescribed by your doctor. Prescription-strength niacin includes such drugs as Niacor and Niaspan. Niacin is also available as an over-the-counter supplement.
In Summary. Commonly reported side effects of niacin include: pruritus, nausea, and flushing. Other side effects include: pruritus, skin rash, and vomiting. See below for a comprehensive list of adverse effects. For the Consumer. Applies to niacin: oral capsule, oral capsule extended release, oral elixir, oral tablet, oral tablet extended release.