Does one time use of morphine show n urine?

Yes - definitely All opiates have an effect on orbital or radial muscles like your retina, bladder & bowel. That's why opiate users have so called 'pinned' eyes. A person on daily morphine for a pain full condition will experience a progressive loss of bladder function over several years. Having a permanently full bladder, getting up every half hour all night to pass very little, are the result. There is a lot of medical reference material available on the net if one looks.