Why does my urine have a lot of blood in it.? i have no pain and i've been taking a lot of zantac (ranitidine) lately

Hematuria: Pain free bleeding increases the risk that this is something more serious than infection or a kidney stone. It could represent cancer. You must go to see the doctor urgently!

See doctor: There are a plethora of reasons to have blood in the urine, but you should not have urinary blood in a normal state. A few possibilities on the list are trauma, infection, kidney disease, kidney stones, overexercise, and cancer. Please see your doctor for a thorough evaluation and work up.

Needs evaluation : There are many causes for blood in the urine, some serious and some less serious but you should have it evaluated by a physician. I doubt that the Zantac (ranitidine) is causing it