OMG Max is homeopathic drops. Use 15 drops or 1/4 dropper full 3-4 times/day. You may initially need to use it every 2 hours. What seems to happen is that the drops train your immune system to more efficiently respond to the fungi you're breathing in.
The OMG Max formula seeks to improve on results by "vaccinating" you against the fungi that usually cause sinus problems.