I have been taking Nexium for a long time. 23 days ago I changed to Protonix. About 4-5 days ago I began to have some unsteadiness and very tired feelings. I have had some episodes of these feelings over the years . I am wondering if these feelings I am having now could be related to this change in medication. Since it did not affect me at the beginning of the change I don't know if that would be the cause.