pain medication that may cause blood in urine
1 Kidney injury. 2  A blow or other injury to your kidneys from an accident or contact sports can cause blood in your urine that you can see. 3  Medications. 4  The anti-cancer drug cyclophosphamide (Cytoxan) and penicillin can cause urinary bleeding.rinary tract infections often occur when bacteria enter your body through the urethra and begin to multiply in your bladder. Symptoms can include a persistent urge to urinate, pain and burning with urination, and extremely strong-smelling urine.
1 Cancers: Kidney and bladder cancers may be associated with blood in the urine. 2  Injury: Trauma to the urinary tract can cause bleeding into the urine. 3  Drugs: Medications including aspirin, heparin, and penicillin can cause hematuria. Nephrolithiasis: Kidney or bladder stones may form inside the urinary tract and can cause bleeding into the urine. 2  Kidney disease: Diseases of the kidney can be associated with blood in the urine. 3  Prostate gland enlargement: Enlargement of the prostate can compress the urethra and partially block the flow of urine.