Really just depends on if they want it to be tested. Some tests are done in the office, while some are sent out to a lab. They can ask for everything except that to be tested. And the answer for being in your system depends on how much you have done, how often you do it and the diet/fluid intake . If you are afraid of failing the test, then DRINK a lot of water/ energy drinks. Take some Niacin, and milk thistle. Both are vitamins and are not illegal. They help your liver process faster and normally helps flush your system. Best advice, if you know of a test coming up, stay clean for at least a week.Goodluck!
Most standard probation tests are for common drugs (cocaine, methamphetamines, opiates, benzos, etc.) and alcohol. Lortab is an opiate so most likely they will test and it will show up. It stays in your system for up to 5 days.