Eguller
As was Doug Barron. In fact, Barron was the first 'known' player to run afoul of the tour's drug testing policy for coming up hot with Beta Blockers in his system. He appealed the 6-month suspension, to no avail. And despite his personal physician making it known that he had a heart condition/other underlying health conditions and were prescribed them.
CBD has medicinal properties that help lower blood pressure... in fact, some users have even been able to discontinue taking blood pressure medication over time. How much CBD is in a piece of chewing gum is anyone's best guess, as I suppose they come in different milligrams like everything else.