Because of my reaction at 40 the first night, like you describe, I backtracked to 20 mg for a week or two weeks, cannot remember to get used to it, then increased to 40, and then over time then increased it. I only take 40 - 60 mg depending on the time of year. This is considered a low dose by the standards for treating BP but works for me. Call your doc and let them know what happened. It is hard to do to get the right dose, but the capsules can be opened and split the dose, and dissolved in OJ or juice or put in apple sauce so doesn't taste as bad, until could get 20 mg capsules. Perhaps that might help. Stay safe and hope you find the right dose for you soon.