What legal drug looks like crystal meth in a urine test?

Oh, dude, that's a tricky one! The legal drug that can make you look like you've been hanging out with Heisenberg is good ol' Sudafed. Yeah, the stuff you take for a stuffy nose can sometimes show up as meth in a urine test. So, next time you're feeling under the weather, just remember you might end up looking like a Breaking Bad extra at the doctor's office.