There isn't really a fastest way to get meth (methamphetamine) out of your system other than to wait it out. If you're needing to pass a drugs test, I've provided some information of how long you can expect to see methamphetamines in your system:
Methamphetamines will be present in urine for up to approximately four days after use.
- Methamphetamines will be present in saliva for up to approximately four days after use.
- Methamphetamines will be present in blood samples for up to approximately three days after use.
- Methamphetamines will be present in hair samples for up to three months after use.
As you can see, there's not much you can do if you've got a drugs test within the period that methamphetamines remain in the system. On a side note, I would recommend that you seek professional help if you have a drugs problem. It's simply not worth it in my opinion.
Here's a pretty shocking video showing the results of methamphetamine abuse. It's sure to make most people think twice before taking any: