$CWNM The drug delivery device is comprised of at

$CWNM The drug delivery device is comprised of at least one dispenser having a solute reservoir element defined by a fluid-impervious or solute-impervious wall and having an orifice, source element, in fluid registry with a gradient forming element that has a release orifice. It is the gradient forming element that prevents an initial burst and release of solute while promoting controlled, prolonged near-zero-order release.