I have court date and outcome is prob probation and random drug tests my question is.. I have an app at a sub clinic before court date but worried does it go against u if your perscribed the subs when your taking drug tests or is it OK cause it's perscribed? Help

I'm so confused want to stop all drug use I have an app at a sub clinic but have a court date commin up the outcome I believe will b probation and drug testing. My ? Is if I have the subs perscribed will that b OK if I get drug testing done. As long as it's a legal script or is nothing allowed at all? Please help