Skip to Content

Niacor

Generic Name: niacin (nicotinic acid) (NYE a sin (NIK oh TIN ik AS id))
Brand Name: B-3-50, B3-500-Gr, Niacin SR, Niacor, Niaspan ER, Slo-Niacin

Medically reviewed on May 15, 2018

What is Niacor?

Niacor, also called nicotinic acid, is a B vitamin (vitamin B3). It occurs naturally in plants and animals, and is also added to many foods as a vitamin supplement. This medicine is also present in many multiple vitamins and nutritional supplements.

Niacor is used to treat and prevent a lack of natural this medicine in the body, and to lower cholesterol and triglycerides (types of fat) in the blood. It is also used to lower the risk of heart attack in people with high cholesterol who have already had a heart attack. This medicine is sometimes used to treat coronary artery disease (also called atherosclerosis).

Niacor may also be used for purposes not listed in this medication guide.

Important Information

You should not take this medication if you are allergic to Niacor, or if you have severe liver disease, a stomach ulcer, or active bleeding.

Niacor can cause certain side effects, such as flushing (warmth, itching, redness, or tingly feeling under your skin). These effects can be made worse if you drink alcohol or hot beverages shortly after you take this medicine. These effects should disappear over time as you keep taking the medication.

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.

Avoid taking colestipol (Colestid) or cholestyramine (Locholest, Prevalite, Questran) at the same time you take Niacor. If you take either of these other medications, take them at least 4 to 6 hours before or after you take this medicine.

Niacor is only part of a complete program of treatment that may also include diet, exercise, weight control, and other medications. Follow your diet, medication, and exercise routines very closely.

Before taking this medicine

You should not take this medication if you are allergic to Niacor, or if you have severe liver disease, a stomach ulcer, or active bleeding.

To make sure you can safely take Niacor, tell your doctor if you have any of these other conditions:

  • liver or kidney disease;

  • heart disease or uncontrolled angina (chest pain);

  • a stomach ulcer;

  • diabetes;

  • gout; or

  • a muscle disorder such as myasthenia gravis.

FDA pregnancy category C. Niacor may be harmful to an unborn baby when the medication is taken at doses to treat high cholesterol or other conditions. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Niacin can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

How should I take Niacor ?

Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Niacor is sometimes taken at bedtime with a low-fat snack. Follow your doctor's instructions.

Niacor can cause certain side effects, such as flushing (warmth, itching, redness, or tingly feeling under your skin). These effects can be made worse if you drink alcohol or hot beverages shortly after you take this medicine. These effects should disappear over time as you keep taking the medication.

Take Niacor with a full glass of cold or cool water. Taking the medication with a hot drink may increase your risk of side effects such as flushing.

Do not crush, chew, break, or open an extended-release tablet or capsule. Swallow it whole. Breaking or opening the pill may cause too much of the drug to be released at one time.

Niacor extended-release tablets and capsules contain higher strengths of the medicine than the regular this medicine tablets. Take only the dose that is correct for the type of niacin tablet or capsule you are using.

Niacor can cause you to have unusual results with certain medical tests (urine tests). Tell any doctor who treats you that you are using this medicine.

If you stop taking Niacor for any length of time, talk with your doctor before starting the medication again. You may need to restart the medication at a lower dose.

While using Niacor, you may need blood tests at your doctor's office. Your kidney or liver function may also need to be checked. Visit your doctor regularly.

Niacor is only part of a complete program of treatment that may also include diet, exercise, weight control, and other medications. Follow your diet, medication, and exercise routines very closely.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Be sure to take the missed dose with food if you normally take your Niacor dose with a meal or snack.

Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include nausea, dizziness, itching, vomiting, upset stomach, and flushing (warmth, redness, or tingly feeling).

What should I avoid while taking Niacor ?

Avoid drinking hot beverages shortly after taking Niacor. Hot drinks can worsen this medicine's flushing effect (warmth, itching, redness, or tingly feeling under your skin).

Avoid drinking alcohol while taking Niacor. Alcohol may increase your risk of liver damage, and can also worsen the flushing effects of niacin.

Avoid taking colestipol (Colestid) or cholestyramine (Locholest, Prevalite, Questran) at the same time you take Niacor. If you take either of these other medications, take them at least 4 to 6 hours before or after you take this medicine.

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.

Niacor side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

  • feeling like you might pass out;

  • fast, pounding, or uneven heart beats;

  • feeling short of breath;

  • swelling;

  • jaundice (yellowing of your skin or eyes); or

  • muscle pain, tenderness, or weakness with fever or flu symptoms and dark colored urine.

If you are diabetic, tell your doctor about any changes in your blood sugar levels.

Less serious side effects of niacin include:

  • mild dizziness;

  • warmth, redness, or tingly feeling under your skin;

  • itching, dry skin;

  • sweating or chills;

  • nausea, diarrhea, belching, gas;

  • muscle pain, leg cramps; or

  • sleep problems (insomnia).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect Niacor?

Tell your doctor about all other cholesterol-lowering drugs you are taking with Niacor, especially atorvastatin (Lipitor, Caduet), fluvastatin (Lescol), lovastatin (Mevacor, Altoprev, Advicor), pravastatin (Pravachol), or simvastatin (Zocor, Simcor, Vytorin, Juvisync).

Ask a doctor or pharmacist if it is safe for you to use Niacor if you are also using any of the following drugs:

This list is not complete and other drugs may interact with Niacor. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Hide