Amoxicillin is a penicillin antibiotic that is excreted mainly through the kidneys and does not usually turn urine yellow. Yellowing of urine may be caused by drinking too little water, urinary tract infections, liver and gallbladder disease, and taking other medications. The yellowing of urine may be caused by the patient taking medication while drinking too little water leading to the concentration of urine, which leads to the yellowing of urine. Secondly, urinary tract infections lead to an increase in inflammatory cells in the urinary bladder and other parts of the body, which can also lead to yellow urine, usually because of pyelonephritis, inflammation of the ureter, inflammation of the bladder or inflammation of the urethra. In addition, liver and gallbladder diseases can cause abnormal bilirubin metabolism, which elevates urinary bilirubin as well as urobilinogen, and can also cause yellow urine. Some special anti-inflammatory drugs can also cause yellow urine, commonly used such as sulfonamide antibiotics or furan antibiotics, such as furotoxin or cotrimoxazole and other drugs, after oral intake, can lead to yellow urine. It is recommended that patients drink more water, if the yellow urine symptoms continue to appear, you can go to the hospital to do routine urine examination to clarify the cause.