Abstract: Gastro-retentive dosage forms for prolonged delivery of levodopa and carbidopalevodopa combinations are described. The dosage forms comprise a tablet containing the active ingredient and a gas-generating agent sealed within an expandable, hydrophilic, water-permeable and substantially gas-impermeable membrane. Upon contact with gastric fluid, the membrane expands as a result of the release of gas from the gas-generating agent in the tablet. The expanded membrane is retained in the stomach for a prolonged period of time up to 24 hours or more during which period the active ingredient is released from the tablet providing delivery of levodopa to the site of optimum absorption in the upper small intestine.

Abstract: An apparatus for supporting a computer keyboard or laptop computer on the lap of the user is generally comprised of a top member, medial member, and lower member assembled in vertically stacked relationship. The top member includes an upper surface for supporting a computer keyboard or laptop computer. A raised ledge adjacent to the upper surface includes a pair of resilient pads to engage the wrists of the user in supporting relationship. An interior cavity extends laterally below the upper support surface to receive a drawer which may be withdrawn slidably from either end of the cavity. The drawer is formed in bilateral sections, one supporting a mouse pad, the other storing floppy disks. A removable copy stand may be erected by engaging a pair of holes formed in each bilateral portion of the drawer. The lower member is provided with a wedge form tapering from the distal edge to the proximal edge, with a pair of shallow troughs formed in the bottom surface to accommodate the legs of the user.