Is THC added to any medications?

Fifteen states and Washington D.C. legalized medical marijuana use between 1996 and 2010. States that have legalized use are Alaska (1998), Arizona (2010), California (1996), Colorado (2000), Hawaii (2000), Maine (1999), Michigan (2008), Montana (2004), Nevada (2000), New Jersey (2010), New Mexico (2007), Oregon (1998), Rhode Island (2006), Vermont (2004) and Washington (1998); Washington D.C. legalized use in 2010. States that have legalized use have different laws on how much usable marijuana a prescription holder can possess or grow. As far as adding THC to medications..marijuana is considered as medication in states that have legalized it for medical purposes.