Marijuana drug testing, also known as THC testing, is very common. Marijuana THC testing is done as part of the SAMHSA 5 drug testing; see below or click SAMHSA 5 Marijuana test. Our Marijuana drug tests come in form of 1 – 13 panel kits. Buy a Marijuana urine test / urine test THC, or a saliva test THC on sale. Marijuana THC drug test kits are easy to use. For more THC marijuana drug testing see Marijuana – Tetrahydrocannabinol – THC.