Hi, Welcome to HCM, I have read your query, urinary retention is the inability to empty the bladder. With chronic urinary retention, you may be able to urinate, but you have trouble starting a stream or emptying your bladder completely. A large decrease in urine output may be a sign of a serious, or even life-threatening condition. However, urine output can usually be restored if you get medical treatment right away. Causes like blood loss, dehydration when you do not drink enough fluids and have vomiting, diarrhea, or fever, medications such as anticholinergics, diuretics, and some antibiotics, severe infection or any other medical condition that leads to shock, total urinary tract blockage. A woman may experience urinary retention if her bladder sags or moves out of the normal position, a condition called cystocele. The bladder can also sag or be pulled out of position by a sagging of the lower part of the colon, a condition called rectocele. Some people have urinary retention from rectoceles. People of all ages and both sexes can have nerve disease or nerve damage that interferes with bladder function. Contact your health care provider if you notice that you are producing less urine than usual and maybe he will re-start or suggest an alternate medicaiton. Thanks