Art,
Thanks for your posted question. Felodipine Cr is a long acting blood pressure medication in a class of drug called calcium channel blockers. There are several different medications within this class. You need to discuss this change with your husband's physician. If possible, provide him with a list of medications that are covered under the formulary of his insurance company. Knowing your husband's history and response to medication, his physician is best qualified to make any changes. I hope this information has been helpful.
Martin Cane, M.D.