Avi, the article you quoted is not suggesting medications to treat OSA. In fact, it says:
Numerous pharmacologic agents have been investigated as potential primary therapies for patients with OSA. However, no agent has been identified that prevents or overcomes upper airway obstruction enough to justify pharmacologic therapy as a primary therapy in the routine management of patients with OSA
So, Avi, is what you're saying is that
you've lost weight,
been re-tested without CPAP and found that you no longer NEED CPAP, but now you're too scared to try going without? If so, first CONGRATULATIONS, and second, why not buy a pulse oximeter to give yourself some peace of mind?
Just don't make the assumption that since you lost weight you DON'T need CPAP, unless you've been through a full PSG that indicates it is so. And that's not what the original poster was asking here--his AHI is 6 WITH CPAP (I think).