That depends on what you're testing for. Urine drug levels are good at room temp or in the fridge for several days. Microalbumin testing is also good for several days in the fridge. However, if the urine is being collected for a routine urinalysis or a microscopic, the urine needs to be tested as soon as possible.es, just make sure it is the normal temperature of urine if you use in a drug test. But freezing in until the drug test will be fine. If you are storing it for this purpose … , it may only stay good for a few days. Make sure it is a day or two fresh before using it in a drug test. 2 people found this useful.