<s>[INST] my father has been taking plavix for 6 months he is now in the hospital with blood in his urine. They are irrigating the bladder and blood clots have decreased but urine still has blood after 24 hours. He had been diagnosed with prostate cancer about a year ago and underwent radiation priBlood in urine. or to taking the plavix. What questions do I need to ask Dr and what reasons could be causing the blood in the urine can it be related to the plavix. [/INST] Hi friend, Welcome to Chat Doctor . I read your query, and it seems that your father has been diagnosed with prostate cancer one year ago, and underwent radiation therapy . You can ask your Doctor that your fathers prostate cancer is in which stage. Blood in urine is not only due to Plavix which is rare complication to manifest but advanced prostate cancer will have typical symptom of Blood in urine.Therefore, I suggest you to start treatment for your father by radiotherapy or surgery in earlier as prostate cancer is treatable if found earlier. Hope this information helps you. Thanks & Take Care. </s>