Hello, I do not think this is related to Diltiazem. Urgent urination describes an overwhelming need to get to a restroom immediately. It may be accompanied by pain or discomfort in the bladder or urinary tract. Urinary tract infections are the most common cause of frequent or urgent urination. Other causes include: drinking too much liquid, drinking caffeine or alcoholic beverages, diabetes, pregnancy, especially in the third trimester, when there is pressure on the bladder medications, vaginal infections or prostate enlargement. It’s possible that frequent or urgent urination could be normal for you if you don’t have other symptoms. The treatment plan for frequent or urgent urination is largely dependent on the cause. Antibiotics can help treat infections. Lifestyle changes such as monitoring liquid consumption and urine output or adjusting medications can help some people. Hope I have answered your query. Let me know if I can assist you further.