Lisinopril and travels

My doctor switched me from Cozaar to Lisnopril at my request. The Cozaar was $40.00 with my insurance -- Lisonpril is $10.00. I think I'm going back to Cozaar. In the last two weeks, I've developed a pain that starts at the base of my head, behind my right ear, and travels down my right arm and into my back. I'm pretty sure it's from the Lisnopril, as weird as that may sound (My mother has the same pain and she also takes Lisnopril. She also has the hacking cough, something I haven't developed yet). I'm also having headaches at the top of my head -- something I've never had before.