For this drug to work well, a certain amount needs to be in your body at all times. If you take too much: You could have dangerous levels of the drug in your body. You may have the following symptoms:. If your symptoms are severe, call or go to the nearest emergency room right away.
What to do if you miss a dose: Take your dose as soon as you remember. But if you remember just a few hours before your next scheduled dose, take only one dose. Never try to catch up by taking two doses at once. This could result in dangerous side effects. Your doctor may adjust your dose depending on your cholesterol levels. A prescription for this medication is refillable. You should not need a new prescription for this medication to be refilled. Your doctor will write the number of refills authorized on your prescription.
This monitoring may be done using three tests:. This can reduce your risk of flushing reddening and warming of your face. There are other drugs available to treat your condition. Some may be better suited for you than others.
Talk to your doctor about other drug options that may work for you. Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up-to-date.
However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects.
The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.
High doses of niacin can cause niacin flush, which appears as red skin that may itch or burn. Vitamin D has numerous health benefits, but it's tricky to know which supplement to choose. Here are 13 of the best vitamin D supplements, according….
This is a detailed review of vitamin D toxicity and how much vitamin D is considered too much. Toxicity is rare, but can occur with extremely high…. When taken in safe doses, magnesium can effectively prevent migraines for many people. Learn more about if it's right for you. Folic acid supplements are generally safe — unless you take too much.
Here are 4 folic acid side effects you should know about. Women over the age of 50 have increased needs for several vitamins and minerals. You can get recommended amounts of niacin by eating a variety of foods, including the following:. It is also available in B-complex dietary supplements and supplements containing only niacin. The two main forms of niacin in dietary supplements are nicotinic acid and nicotinamide.
Niacin in the form of nicotinic acid is also available as a prescription medicine used to treat high blood cholesterol levels.
Most people in the United States get enough niacin from the foods they eat. Niacin deficiency is very rare in the United States. However, some people are more likely than others to have trouble getting enough niacin:. You can develop niacin deficiency if you don't get enough niacin or tryptophan from the foods you eat.
Severe niacin deficiency leads to a disease called pellagra. Pellagra, which is uncommon in developed countries, can have these effects:. Scientists are studying niacin to better understand how it affects health. Here is an example of what this research has shown. Cardiovascular disease Scientists have studied the use of large doses of niacin in the form of nicotinic acid to help reduce the risk of heart attack and stroke in people with atherosclerosis.
They found that prescription-strength nicotinic acid more than times the recommended dietary allowance can lower blood levels of LDL bad cholesterol, raise levels of HDL good cholesterol, and lower levels of triglycerides. In addition, experts do not recommend high doses of nicotinic acid for people taking a statin medication. Your healthcare provider should approve and supervise any use of very high doses of nicotinic acid in the thousands of milligrams to treat atherosclerosis.
Use the medicine exactly as directed. Niacin can cause flushing warmth, itching, redness, or tingly feeling under your skin. These effects should disappear over time as you keep taking the medicine. Flushing may be worse if you drink alcohol or hot beverages shortly after taking niacin. Your dose needs may change if you switch to a different brand, strength, or form of this medicine.
Avoid medication errors by using only the form and strength your doctor prescribes. If you stop taking niacin 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. This medicine can affect the results of certain medical tests. Tell any doctor who treats you that you are using niacin. Niacin is only part of a complete treatment program that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely. Keep using these medicines for as long as your doctor has prescribed.
New Engl J Med , Kardiol Pol. Office of Dietary Supplements. Niacin: Fact Sheet for Health Professionals. Updated July 9, Office of Disease Prevention and Health Promotion. Washington, D. Department of Health and Human Services. The mechanism and mitigation of niacin-induced flushing. Int J Clin Pract. Int J Clin Pharmacol Ther ;45 2 Keenan JM. Wax-matrix extended-release niacin vs inositol hexanicotinate: a comparison of wax-matrix, extended-release niacin to inositol hexanicotinate "no-flush" niacin in persons with mild to moderate dyslipidemia.
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