How Long does Methadone Stay in Your System?

How long does Methadone stay in your system, well the half life of methadone is 24 to 36 hours, but it can stay in your system a lot longer. It may stay in your system up to 7 hour to 52 hours, but that also will depend and vary on how much and how often you take it. Here is a website that will help guide you on the different drugs and how long they will stay in your system