Oil of Oregano sure helped me. I had severe sinus and congestion going on for months about this time last year. Even resorted to a round of antibiotics. I would feel better, then in a few weeks it was back. I stumbled upon oil of oregano and bought 150mg gel caps at the health food store. Found online that for infection to use 600mg. I took two caps in the morning and two in the evening for about 5-6 days. It worked!!! All the congestion in my lungs and sinuses are still cleared up. WARNING!!!! - This acts like a detox so be prepared for the toxic release side effects. They can be flu like. Next time I will only take 350mg a day.