I have been on Aciphex 20 since 2007, with instant results. After changing Health Ins. , I am told by the current insurer that they won't cover Aciphex. I must go thru a step program, starting with Nexium, which my Doctor dosed at 40 mg instead of 20 mg, saying Nexium didn't come in 20 and the 40mg of Nexium is comparable to the 20 mg Aciphex . Questions: (1) Is the above true? (2) Are the side effects the same, and (3) What's the difference between the two.