Neuropozyne

Neuropozyne, informally called Nu-poz, is an anti-rejection drug used by mechanically-augmented humans to stop the build up of glial tissue around augmentations.

Background
Unlike simple non cybernetic implants like a hip replacement which can be made from hypoallergenic materials there is a need for any cybernetic augmentation that will "feel" and can be moved by the mind to have a neuroprosthetic junction. The innovation of Hugh Darrow and his PEDOT's allowed this sort of conjuction between the mechanical "nerves" and the organic ones. The problem came when the body starts to secrete glial nerve tissue around the junction, causing what is best described as nerve scars. The scarring eventually disrupts the integrity of the neuroprothetic junction causing rejection syndrome.

Neuropozyne is a compound that prevents the buildup of glial nerve tissue around the junction. It is available by prescription only and weekly doses are required to prevent the disruption of the junction. Although it is not produced with especially rare materials, its distribution is heavily monitored and it can sell for extraordinary prices on the secondhand market.