Can a drug test tell the difference between different benzos? (& do doctors test when prescribing benzos?)
Recently started seeing a doctor and got a prescription for Ativan (for legitimate treatment of anxiety), but also have used some Valium as well. As I understand, diazepam has different metabolites than lorazepam, and it also has a much longer half-life.
First question: would a drug test be able to tell which benzos I've been using? I just want to know in case I get tested by my doctor or a potential employer, especially because of the very long half-life of diazepam.
I figure a simple drug test (ie the basic multi-panel drug test, or home drug tests) would show up positive for benzos regardless. But after that, they usually send the sample off for a more advanced test (ie GCMS) to confirm the result. With the second test, would they be concerned as to which benzo I was using...or would I be fine as long as I could present a prescription for Ativan?
Second question: how common is it for a doctor to give a drug test if they're prescribing controlled drugs? I've heard stories of people being drug tested by their doctor, particularly if they're prescribing C-II or high "street" demand medication (ie oxycodone, adderall). Or if the doctor knows the patient has a history of substance abuse.
But the doctor didn't give me anything "stronger" than the benzo, so how likely would it be? I don't want to exhaust my supply of ativan since i don't know how long she's gonna keep me on it, and in some cases valium is more preferable (longer duration etc.)