 Medical marijuana is known to have helped with many health issues and has even worked better than conventional medicines in some cases. Both Cambridge, U.K.-based GW Pharmaceuticals NASDAQ: GWPH and Massachusetts, U.S.-based Corbus Pharmaceuticals Holdings NASDAQ: CRBP stocks are up double-digits to 29.4 and 27.2 year to date, while the market is down by 0.66 as tracked by the SPDR SP; 500 ETF. GW Pharmaceuticals has been seeing staggering revenue growth this year, and it appears it could further surge thanks to the rising sales of Epidiolex. 