Let me tell you a story. I am allergic to sulphides. I had two doctors prescribe Celebrex, and three pharmacies fill that prescription, despite, unknown to me, Celebrex, while NOT a sulphide, is NOT recommended to those allergic to sulfur. When I moved my prescriptions to Rite-Aid, they refused to fill it, because of my allergy. I was having allergic reactions to something, but didn’t know what, until they caught it. Now I will not go anywhere else for my medications.