[What are patients' attitudes towards generic drugs? The example of metformin].

The success of cost containment with generic drugs is based on consumer's willingness to accept substitution. This investigation reveals 3 major themes that can explain attitudes of patients towards generics: 1) personal beliefs and knowledge (coming from the media issues, family, friends) are fragmented and sometimes erroneous, with a background of suspicion on the quality of the generics; 2) relation with the prescriber (indirectly pharmacist) is central to build up patient's trust; suspicious professionals generate an anxious patient; 3) previous experience from the consumer with generics. Starting from patients' experiences and beliefs allows to anticipate their resistance to the generic and to adapt drug prescription choices.