I have medco as my perscription plan. Anyway, prevacid is so expensive and the medco website suggested asking my Dr. to see if it would be OK if I took Ranitidine HCL 300 MG Tablet. Has anyone on here sustituted Prevacid for this medicine. If so, did it work just as good for you? I've been on the Prevacid for two weeks now and really feel like it's beginning to work. My ent gave me samples out of the office and I'm almost out and don't want to refill it if I can get a cheaper version. I know there is not a generic out for Prevacid yet...so I was suprised to see Ranitidine was an option for it.