Acute pharyngitis after IV urine is very yellow, may be a small amount of urine or the metabolism of the drug caused, but also does not rule out the disease caused by, for example, urinary tract infections, hepatitis and so on. Acute pharyngitis may be caused by viral or bacterial infections, IV drugs in the body after metabolism, usually by the kidneys for excretion, so after IV, due to the urine contains a large number of drugs, metabolites, so it will lead to yellow urine color, is a normal phenomenon, usually after stopping the medication, the urine color will gradually return to normal. But if the urine color is still persistently yellow after stopping the drip, you need to exclude other diseases, such as urinary tract infection, hepatitis, obstructive jaundice, etc., you should go to the hospital in a timely manner, according to the doctor’s instructions to take the relevant examination, to clarify the cause of the target to take treatment.