DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Hydrocodone drug. Molecular model of the analgesic drug hydrocodone (C18H21NO3). Atoms (sticks) are colour-coded: carbon (yellow), hydrogen (white), nitrogen (blue) and oxygen (red). A flat 6-carbon- atom benzene ring is at centre left. Hydrocodone is an opiate analgesic (painkiller). It is usually taken in a formulation where it is combined with other drugs, such as paracetamol or aspirin.
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