Pronunciation: NYE-uh-sin
Generic Name: Niacin
Brand Name: Generic only. No brands available.
Niacin Capsules is used for:
Treating and preventing low levels of niacin. It may also be used for other conditions as determined by your doctor.
Niacin Capsules is a water soluble B-complex vitamin. It works by supplementing your diet if you do not consume enough niacin from foods.
Do NOT use Niacin Capsules if:
- you are allergic to any ingredient in Niacin Capsules
Contact your doctor or health care provider right away if any of these apply to you.
Before using Niacin Capsules:
Some medical conditions may interact with Niacin Capsules. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have a history of bleeding problems, chest pain, diabetes, gallbladder problems, glaucoma, gout, heart problems or a recent heart attack, liver problems, low blood pressure, or stomach problems (eg, ulcers)
- if you have an alcohol addiction
Some MEDICINES MAY INTERACT with Niacin Capsules. Tell your health care provider if you are taking any other medicines, especially any of the following:
- Fibrates (eg, gemfibrozil, fenofibrate) or HMG-CoA reductase inhibitors ("statins") (eg, simvastatin) because side effects, such as muscle aches and weakness, may occur and may be a symptom of a serious medical condition called rhabdomyolysis
- Alcohol because toxic effects, such as delirium and lactic acidosis, may occur
This may not be a complete list of all interactions that may occur. Ask your health care provider if Niacin Capsules may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
How to use Niacin Capsules:
Use Niacin Capsules as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- Take Niacin Capsules by mouth with or without food. If stomach upset occurs, take with food to reduce stomach irritation.
- If you miss a dose of Niacin Capsules, take it as soon as possible. If it is almost time for the next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.
Ask your health care provider any questions you may have about how to use Niacin Capsules.
Important safety information:
- Niacin Capsules may cause dizziness or lightheadedness. These effects may be worse if you take it with alcohol or certain medicines. Use Niacin Capsules with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
- Niacin Capsules may cause dizziness; alcohol, hot weather, exercise, or fever may increase this effect. To prevent it, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of this effect.
- Niacin Capsules may cause warmth or flushing. Check with your doctor for ways to lessen these effects.
- Diabetes patients - Niacin Capsules may affect your blood sugar. Check blood sugar levels closely. Ask your doctor before you change the dose of your diabetes medicine.
- Do not take large doses of vitamins while you use Niacin Capsules unless your doctor tells you to.
- Do not use a different dosage form of Niacin Capsules. Cases of severe liver toxicity, including fulminant hepatic necrosis, have occurred in patients who have substituted sustained-release (modified-release, timed-release) nicotinic acid products for immediate-release (crystalline) nicotinic acid at equivalent doses.
- Lab tests, including liver function tests and serum creatine kinase tests, may be performed while you use Niacin Capsules. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
- PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Niacin Capsules while you are pregnant. It is not known if Niacin Capsules is found in breast milk. If you are or will be breast-feeding while you use Niacin Capsules, check with your doctor. Discuss any possible risks to your baby.
Possible side effects of Niacin Capsules:
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Stomach upset; temporary skin redness, tingling or feelings of warmth (flushing)
Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); black, tarry, or bloody stools; changes in vision; cloudy or blurred vision; decrease in urine or dark-colored urine; fast or irregular heartbeat; flu-like symptoms (nausea, vomiting, "not well" feeling); irregular heartbeat; loss of appetite; muscle weakness, swelling, tenderness, or pain; numbness or persistent tingling of the skin; swelling of the hands, legs, or feet; vomit that looks like coffee grounds; yellowing of the skin or eyes.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.
See also: Niacin side effects (in more detail)
If OVERDOSE is suspected:
Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include flushing.
Proper storage of Niacin Capsules:
Store Niacin Capsules at room temperature, between 59 and 86 degrees F (15 and 30 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep Niacin Capsules out of the reach of children and away from pets.
General information:
- If you have any questions about Niacin Capsules, please talk with your doctor, pharmacist, or other health care provider.
- Niacin Capsules is to be used only by the patient for whom it is prescribed. Do not share it with other people.
- If your symptoms do not improve or if they become worse, check with your doctor.
- Check with your pharmacist about how to dispose of unused medicine.
This information is a summary only. It does not contain all information about Niacin Capsules. If you have questions about the medicine you are taking or would like more information, check with your doctor, pharmacist, or other health care provider.
More Niacin resources
- Niacin Side Effects (in more detail)
- Niacin Use in Pregnancy & Breastfeeding
- Niacin Drug Interactions
- Niacin Support Group
- 22 Reviews for Niacin - Add your own review/rating
Compare Niacin with other medications
- Depression
- High Cholesterol
- Hyperlipoproteinemia
- Hyperlipoproteinemia Type IV, Elevated VLDL
- Hyperlipoproteinemia Type V, Elevated Chylomicrons VLDL
- Niacin Deficiency
- Pellagra
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