No they do not. they do however, check for levels of methadone and levels of metabolites to prove the methadone was injested. so if you pour methadone in a drink that looks like urine, no metabolites and too much methadone would look suspicious. I assume this is why you asked.
No, methadone clinics usually do not test for flexeril.
if your a woman you can use male pee, but a man may use woman pee and show up poregnant
Easy, they don't generally care about marijuana at methadone maintenance clinics.
Drug test to check for methadone metabolites in urine
Yes methadones show up in urine anylsis if it is testing for it. Different lab use different panels to test different drugs. The lab can even tell if the methadone was processed through your liver. Clients at Methadone clinics who get the wafers can literally just spit into their pee and it will show methadone in their system since methadone is that potent.
Only methadone will be detected because the methadone urine test is specifically used to detect methadone.
If you mean 'spike' as in "adding" it to urine sample, bad idea: It will screw up the test because METHADONE needs to be metabolized through the body first. Now the people testing you might write it off as "irregular" if you are lucky. However, most METH clinics are hip to this and they will f%# with you.
yes, if methadone is specifically tested for. Most of the time methadone is not tested for, but on tests with more panels a test for methadone will be present. Methadone does not show up in the urine as an opiate.
Methadone can stay in the urine 3 to 5 days depending on the rate of metabolism.
Testing exists to ensure that methadone patients are actually taking their medication and not selling it on the black market. I'd like to elaborate on the above answer. Testing for Methadone assures that patients are taking their medications because most people that are taking Methadone are on a previous medication that is causing the withdrawal alot of Methadone users will sell the drug to get their drug of choice. Also they want to make sure the user is not abusing the drug by taking too much.
Not doing methadone in the first place
Most employers do not check for methadone. However, some professions such as medical professions may be required to screen for methadone.