Cathinones and drug testing..

Hellooo0oo I was wondering if anyone knows anything about the logistics of cathinones in urine screens. I'm aware that cathinone is chemically close to amphetamine, so i'm guessing it would prove a false positive for that.
MDMC would come up as MDMA, etc?
I'm also curious as to whether anyone has tested positive for MDPV, which I've been using for study purposes recently.

any thoughts or data is greatly appreciated!

 

im not 100% but i would say its likely it could cause a positive reading for amphetamines or mdma. especially if its a good lab test, not one of the shitty 5-panels you would get from cvs

 

I haven't been chancing it with methylone, but I've been snorting small amounts of MDPV to stay awake and focused for classwork (it's really pleasant in small amounts, minute euphoria hehe) but I haven't been able to find out if its testable. My school tests me every four weeks or so, so I've just cut off most things a week or so in advance. Unfortunately I'm not sure which test exactly they administer here, I'll try and figure that out shortly I suppose