The half-life for opiates can range from 1-9 hours, depending on how much you take and which type. For instance, the half-life of morphine is 1.5-6.5 hours, the half-life of codeine is 1-4 hours, and the half-life of hydrocodone is 3.5-9 hours The amount of time that opiates can be detected in your system relies on the type of test.
