n. 1  A nucleic acid that carries the genetic information in cells and some viruses, consisting of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine.
Less than 1 percent of patients with normal results on liver function tests before taking extended-release niacin tablets have elevated liver enzyme values (more than three times the reference range) after niacin is started.
N-acetylcysteine also sometimes helps people with acute liver failure that was not caused by too much acetaminophen. If viral hepatitis B is the cause of your acute liver failure, your doctor may give you one of several medicines called nucleos(t)ide analogs.