RSO + CBD Complete Syringe (3 grams). Rick Simpson Oil, called RSO for short, is one of the most versatile and lauded cannabis innovations—an oil created by Rick Simpson, a Canadian engineer and cannabis advocate. RSO is an oil derived from cannabis. But rather than a solvent extract that strips trichomes from buds, RSO contains all the cannabinoids, terpenes, and additional compounds of the whole cannabis plant. RSO + CBD combines both the benefits of THC and CBD. Medical patients have said this increases the benefits of the premium broad spectrum which can help aid in the relief of multiple ailments. Place 1 to 2 large drops under tongue, upon consumption please wait 30 to 45 minutes for desired effects.