Niacinamide, a form of vitamin B-3, has mild side effects such as dizziness, headache, and gastrointestinal discomfort. Rare but serious allergic reactions can occur. It is found in many foods and supplements and is used to treat medical conditions. High doses can cause liver and heart problems. Anaphylaxis is a potentially life-threatening allergic reaction. Consult a doctor for any concerns.
Side effects of niacinamide are usually mild and present no specific health problems, although any bothersome symptoms that develop after taking this drug should be reported to a doctor for further evaluation. The most common side effects include dizziness, headache or gastrointestinal discomfort. Occasionally, a rare but potentially life-threatening allergic reaction known as anaphylaxis can occur. Any custom questions or concerns about the specific side effects of niacinamide should be discussed with a doctor or other medical professional.
A form of vitamin B-3, niacinamide occurs naturally in many foods, including eggs, leafy green vegetables, and fish. Vitamin supplements containing this ingredient are also available. Most people are able to consume this nutrient without problems, although adverse side effects are possible, especially when consumed in large doses. Niacinamide is also used to treat medical conditions such as diabetes or certain skin conditions.
Headache, dizziness or itching are potential side effects. These symptoms are usually mild and go away within a few days as the body adjusts to the medication or supplement. If these side effects persist or become bothersome, consult a doctor. This drug may not be recommended for people with underlying health conditions such as diabetes, gallbladder disease, or heart problems.
Mild gastrointestinal upset is a relatively common side effect of niacinamide. Nausea, intestinal cramps, or diarrhea may occur after consuming a food or drug containing this nutrient. Dehydration can develop if these symptoms become severe, so extra care should be taken to replenish lost fluids.
More serious niacinamide side effects can occur when taken in high doses, often prompting the supervising physician to order periodic blood tests. Over time, liver problems may develop or heart problems may set in. High blood sugar levels or vision problems are also potential side effects of niacinamide. Low doses of niacinamide are thought to be relatively safe for pregnant or nursing women, although doctor’s approval is strongly recommended.
Anaphylaxis is a medical term that describes a potentially life-threatening allergic reaction that can occur even after you have successfully taken this drug in the past. Symptoms often include a rash; urticaria; or swelling of the face, lips, or throat. When the throat swells, breathing may become difficult and the patient may lose consciousness. This is a medical emergency, as permanent brain damage or even death can occur within minutes without sufficient oxygen intake.
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