MPH compound in capsule form that makes use of coated and uncoated MPH microparticles, comparable to other MPH ER capsules. Within this preparation, 37% with the beads are uncoated for IR and the rest with the beads are coated for ER.Quillichew ER tablets have 30% uncoated (IR) microparticles and 70% film coated ER microparticles of MPH. The MPH mi