 [ Symptoms ] is there any otc medication for water retention due to high blood pressure [ Disease ] bilirubin is a by product of the liver system but small amount of bilirubin detected on a urine test strip may not necessarily indcated a problem in this area concentrated urine can give a false reading so it is up to your doctor to determine the significance nitrites are positive in the presence of a possible urinary infection again it would be up to your medical provider to determine if this is a possibility