SDN Members don't see this ad. (About Ads) I have a question that 3 other pharmacists and a search on SDN and google havent been able to answer. If the doctor writes the generic name of a drug (such as cyclobenzaprine) and then marks do not substitute or DAW 1 do you fill generic or brand. For DAW 1 Ive sometimes seen it mean "Do not substitute" and other times I have seen it mean "Brand is medically nesescary." As for "do not substitute" and writing the generic name, it would seem logical to fill as generic since they wrote the generic name. I wasnt sure if "checking do not substitute" means you can only fill brand regardless of what writen. Maybe the MD cant remember the name of the brand? Thanks!