Oxygen is the most effective treatment for me. I have tried many different remedies and nothing works as well or as long-acting as high-flow oxygen, 12-15 lpm through a non-rebreather mask for at least 10 minutes. Then you can administer your back-up medications to get rid of the shadows, which for me is Advil and coffee, a 1/2 teaspoon of salt mixed in a cup of water to help with the dizziness, and then I'm feeling normal again.