Hydromorphone HCl pill diagram

A cross-section of a tablet containing Hydromorphone HCl showing its various features and functions. The tablet has a white outer layer with a grey ring through it. The inside of the tablet is split into two layers green on top and blue on the bottom. A hole is visible going through the grey and white outer layers to the green layer. Various parts of the tablet are labeled. From outside in: The grey ring is labeled as "Hard shell (clear or colored overcoat). The white outer layer is labeled as "Rate-Controlling membrane". The hole is labeled as "Laser-Drilled Hole (point of drug release)". The green layer is labeled "Hydromorphone HCI (drug layer)". The blue layer is labeled as "Osmotic pump (push layer)". The background is a blue gradient with text and arrows in black.

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