Thank you for your question. This is one that many patients get confused about. Botox is used to soften or relax muscles to minimize fine lines. It is commonly used to soften the frown lines, crows feet, forehead lines, and several other areas. Fillers are used to "plump" areas of the face and lips that have lost volume. Therefore if you are interested in plumping or adding volume to the lips you are looking for fillers. Our favorite lip filler at this time is Restylane Silk. Allergan has a new product that will launch soon, but currently Silk and Juvederm are the most commonly used in our practice. They give a natural, beautiful look. More important than the product, is the injector. You must find an experienced injector who has used several products so they can choose the best option for you and your desired look.