Wax is a highly concentrated form of tetrahydrocannabinol (THC), the main intoxicating drug found in marijuana. This risky form of marijuana has 40-80 percent more THC per dose than more traditional, dried forms of pot. The Drug Enforcement Administration (DEA) found that, in 2013, the THC concentrations in wax or oil measured around 54 percent. In the years since, the process has likely become refined enough that there are higher levels of THC present, which can cause severe side effects. The DEA has reported that some wax samples contain 99 percent THC, which is a dangerous level for most people.