The blood drug test is becoming a very common form of drug testing. If you have been asked to take a blood drug test, the best way to detox and prepare is drinking plain water and perspiring, especially for those with high toxin levels and THC (marijuana) users. Toxins are stored in your fatty tissues. Drinking water and sweating is the only way to get clean or lower your drug metabolite count making it easier to mask whatever toxins are left. How fast you get clean depends on your fatty tissue count, speed of your metabolism, strength and amount of toxins ingested and for how long the toxins were ingested. Below are some products to help you clean your system.Products to Pass a Blood Drug Test.