Yellow urine after taking H. pylori quadruple drug is related to adverse drug reactions, low water intake, and urinary tract infections. 1. Adverse drug reaction: Furazolidone in H. pylori is made of yellow powder, which is mainly metabolized by kidneys and maintains a high concentration of the drug in the intestines, and some of the absorbed drug is excreted in the urine. Its drug side effects may lead to yellow urine, after stopping the drug this phenomenon will then disappear, so do not be overly worried and nervous. 2. drink less water: in the treatment of Helicobacter pylori during the medication, patients drink less water, the formation of urine is also less, the urine is in a state of concentration, resulting in the renal tubular reabsorption of more, urea nitrogen, urobilinogen concentration increases, so the yellowing of urine. 3. Urinary system infection: the body itself may have a urinary system infection, secretions mixed in the urine, resulting in yellow urine phenomenon. Taking Helicobacter pylori quadruple drugs after the phenomenon of yellow urine, you can first observe, if the drug is discontinued after long-term yellow urine and did not reduce, or other parts of the body to appear signs of discomfort, to consult a doctor in a timely manner to do a good job of examination.