I am prescribed 70 mg vyvanse,20 mg celexa, and 150 mg wellbutrin (bupropion) 2x daily. the new dr. i have seen says i test positive for meth. don't use meth ever?

Vyvanse (lisdexamfetamine) shows up: as amphetamine in urine screens. It's often written on a lab report as "amphetamines/methamphetamines" with a positive result's being above a certain cut-off number. You're on the maximum adult daily dose of Vyvanse (lisdexamfetamine). Please seek referral to a psychiatrist who knows its potential for drug interactions with Celexa & WB & is familiar with interpreting drug screen reports.

Citalopram: citalopram (Celexa) may cause a false positive result on certain types of drug tests for amphetamines, as can bupropion. Doctors rely heavily on these tests (and have to by law) to treat ADD/ADHD, so potential for false-positives can be a very difficult situation. It is ultimately up to the prescribing doctor, but a re-test with a different assay is often performed.

Not uncommon: Vyvanse is lisdexamfetamine and converted to dextroamphetamine so it would not be unusual for your urine lab tests to show positive for methamphetamine. It is largely excreted by urine and almost half as amphetamine-related compounds.