Medically reviewed by Drugs.com. Last updated on Nov 10, 2020.
Uses of Niacin Capsules and Tablets:
- It is used to lower bad cholesterol and raise good cholesterol (HDL).
- It is used to lower triglycerides.
- This vitamin is used to treat niacin deficiency.
- It may be given to you for other reasons. Talk with the doctor.
What do I need to tell my doctor BEFORE I take Niacin Capsules and Tablets?
- If you have an allergy to niacin, niacinamide, or any other part of this medicine (niacin capsules and tablets).
- If you are allergic to this medicine (niacin capsules and tablets); any part of this medicine (niacin capsules and tablets); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
- If you have any of these health problems: Bleeding problems, liver problems or rise in liver enzymes, or ulcer disease.
- If you are breast-feeding or plan to breast-feed.
This is not a list of all drugs or health problems that interact with this medicine (niacin capsules and tablets).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this medicine (niacin capsules and tablets) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Niacin Capsules and Tablets?
- Tell all of your health care providers that you take this medicine (niacin capsules and tablets). This includes your doctors, nurses, pharmacists, and dentists.
- If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take this medicine (niacin capsules and tablets).
- Follow the diet and workout plan that your doctor told you about.
- Do not take colesevelam, colestipol, or cholestyramine within 4 hours of this medicine (niacin capsules and tablets).
- Avoid or limit drinking alcohol to less than 3 drinks a day. Drinking too much alcohol may raise your chance of liver disease. Alcohol may cause more flushing.
- A severe muscle problem (rhabdomyolysis) has happened when this medicine (niacin capsules and tablets) was used along with certain drugs for high cholesterol like atorvastatin and simvastatin. Sometimes, this has been deadly.
- If you are 65 or older, use this medicine (niacin capsules and tablets) with care. You could have more side effects.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this medicine (niacin capsules and tablets) while you are pregnant.
How is this medicine (Niacin Capsules and Tablets) best taken?
Use this medicine (niacin capsules and tablets) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Take this medicine (niacin capsules and tablets) with food.
- Avoid alcohol, hot drinks, or spicy foods when it is time to take this medicine (niacin capsules and tablets).
- Keep taking this medicine (niacin capsules and tablets) as you have been told by your doctor or other health care provider, even if you feel well.
What do I do if I miss a dose?
- Take a missed dose as soon as you think about it.
- If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
- If you stop taking this medicine (niacin capsules and tablets), talk with your doctor. You may need to be restarted at a lower dose and raise the dose slowly.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of high blood sugar like confusion, feeling sleepy, more thirst, more hungry, passing urine more often, flushing, fast breathing, or breath that smells like fruit.
- Muscle pain or weakness.
- Chest pain or pressure.
- Dizziness or passing out.
- Shortness of breath.
- Sweating a lot.
- Very bad and sometimes deadly liver problems have happened with this medicine (niacin capsules and tablets). Call your doctor right away if you have signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
What are some other side effects of Niacin Capsules and Tablets?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Flushing. Taking aspirin 30 minutes before taking this medicine (niacin capsules and tablets) may help. If you wake up at night with flushing, get up slowly if you feel like passing out or you are dizzy.
- Upset stomach or throwing up.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Niacin Capsules and Tablets?
- Store at room temperature.
- Store in a dry place. Do not store in a bathroom.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about this medicine (niacin capsules and tablets), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Frequently asked questions
More about niacin
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- During Pregnancy
- Dosage Information
- Drug Images
- Drug Interactions
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- En Español
- 108 Reviews
- Drug class: miscellaneous antihyperlipidemic agents
- Drug Information
- Niacin (Advanced Reading)
- Niacin Controlled-Release Capsules and Controlled-Release Tablets
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Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.