Your healthcare provider should approve and supervise any use of very high doses of nicotinic acid in the thousands of milligrams to treat atherosclerosis. The niacin that food and beverages naturally contain is safe.
However, dietary supplements with 30 mg or more of nicotinic acid can make the skin on your face, arms, and chest turn red and burn, tingle, and itch. These symptoms can also lead to headaches, rashes, and dizziness. These include:. Long-term treatment, especially with extended-release forms of nicotinic acid, can cause liver problems, including hepatitis and liver failure.
Niacin in the form of nicotinamide has fewer side effects than nicotinic acid. The daily upper limits for niacin from dietary supplements are listed below. Niacin dietary supplements can interact or interfere with certain medicines that you take, and some medicines can lower niacin levels in your body.
Here are some examples:. Tell your doctor, pharmacist , and other healthcare providers about any dietary supplements and prescription or over-the-counter medicines you take. They can tell you if the dietary supplements might interact with your medicines.
They can also tell you if the medicines might interfere with how your body absorbs , uses, or breaks down niacin and other nutrients. Foods contain vitamins, minerals, dietary fiber , and other components that benefit health.
In some cases, fortified foods and dietary supplements are useful when it is not possible to meet needs for one or more nutrients e. For more information about building a healthy dietary pattern, see the Dietary Guidelines for Americans and the U. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine. If you miss a dose of this medicine, take it as soon as possible.
However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing. There is a problem with information submitted for this request.
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Health Conditions Discover Plan Connect. Niacin, Oral Tablet. Prescription niacin is available as a generic drug and as brand-name drugs. Brand names: Niacor, Niaspan. Niacor comes as an oral tablet, and Niaspan comes as an oral extended-release tablet. Generic niacin comes in both forms.
Prescription niacin is used to reduce the levels of cholesterol and triglycerides fatty substances in your blood, and decrease your risk of a heart attack. It works along with diet, exercise, and weight loss. Important warnings. What is niacin? Niacin side effects. Niacin may interact with other medications.
Niacin warnings. How to take niacin. Take as directed. Important considerations for taking niacin. Are there any alternatives? The Surprising Truth. Magnesium for Migraines. Read this next. Is Niacin Flush Harmful? Magnesium for Migraines When taken in safe doses, magnesium can effectively prevent migraines for many people. The 10 Best Multivitamins for Women Over If you stop taking niacin for any length of time, call your doctor before you start taking it again.
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture not in the bathroom. Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them.
However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. It is important to keep all medication out of sight and reach of children as many containers such as weekly pill minders and those for eye drops, creams, patches, and inhalers are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location — one that is up and away and out of their sight and reach.
In case of overdose, call the poison control helpline at If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at Keep all appointments with your doctor and the laboratory.
Your doctor will order certain lab tests to check your response to niacin. Before having any laboratory test, tell your doctor and the laboratory personnel that you are taking niacin.
Only use the brand and type of niacin that your doctor prescribed. Do not use another brand of niacin or switch between products without talking to your doctor. If you switch to a different brand or type of niacin, your dose may need to be changed.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
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