How long does phentermine stay in your system?

**top-dawg** · 05-22-2006, 03:26 PM

Hi Kristine, Caffeine will decrease it. It actually pushes the phentermine out of your system. dawg

**blkgp1** · 04-17-2008, 12:59 AM

How many days do you have to wait before a drug test so it doesn't show up as an amphetamine in your system? 5 days?

**susanpesek** · 04-17-2008, 01:49 PM

It should be completely gone in 72 hours. In most folks, the amount is negligible after 14 hrs, meaning if you want to go to sleep around 10 pm, best take it before 8 am!