Niacinamide

• This vitamin is used to treat or prevent 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 Niacinamide?

• If you have an allergy to niacin, niacinamide, or any other part of niacinamide.
• If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.

This medicine may interact with other drugs or health problems.

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 niacinamide 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 Niacinamide?

• Tell all of your health care providers that you take niacinamide. 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 niacinamide.
• Follow the diet and workout plan that your doctor told you about.
• 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.
• Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using niacinamide while you are pregnant.
• Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is this medicine (Niacinamide) best taken?

Use niacinamide as ordered by your doctor. Read all information given to you. Follow all instructions closely.

• Take niacinamide with food.
• Avoid alcohol, hot drinks, or spicy foods when it is time to take niacinamide.

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.

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.
• 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.
• Muscle pain or weakness.
• Chest pain or pressure.
• Dizziness or passing out.
• Shortness of breath.
• Sweating a lot.

What are some other side effects of Niacinamide?

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 niacinamide may help. If you wake up at night with flushing, get up slowly if you feel like passing out or you are dizzy.
• Itching.
• Diarrhea.
• Upset stomach or throwing up.
• Cough.

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-FDA-1088. You may also report side effects at http://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 Niacinamide?

• 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.
• Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
• Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
• Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about niacinamide, 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.

Further information

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

Medical Disclaimer

More about niacinamide

• Side Effects
• During Pregnancy
• Dosage Information
• Drug Interactions
• 1 Review
• Drug class: vitamins

Consumer resources

• Niacinamide Extended-Release Tablets

Related treatment guides

• Niacin Deficiency
• Pemphigus