Hi. Prevacid worked really well for me, till my insurance made me switch. I've been on nexium, prilosec, prilosec generic, and prilosec OTC. I'm on protonix now. I think it works the best, but the insurace is making me pay twice as much as for my other meds. I may have to go back to the OTC and tums when that is not enough. I shouldn't complain, I'd really be in trouble if my insurance didn't pay for med.