If you experience any of the following serious side effects, stop taking nicotinic acid and seek emergency medical attention:
an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives); ;
chest pain or an irregular (fast or slow) heartbeat; ;
yellowing of your skin or eyes (liver damage); ;
a flu-like feeling, including nausea, loss of appetite, aching, and a general feeling of not being well (liver or blood problems); ;
unexplained muscle pain, aching, or weakness (muscle disease or gout); or ;
dizziness, faintness or fainting spells; ;
cloudy or blurry vision. .
If you have diabetes, talk to your doctor if you have changes in your blood glucose.
Other, less serious side effects may be more likely to occur. Continue to take nicotinic acid and talk to your doctor if you experience
stomach upset, gas, bloating, vomiting, diarrhea or nausea (take nicotinic acid with food to decrease this side effect). ;
warmth and flushing of the neck, ears, and face along with itching, tingling, and headache (you may need to take aspirin or a non-steroidal anti-inflammatory drug before taking a dose of nicotinic acid to prevent this side effect, which generally lessens with time). .
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
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