KALLISTA IMAGES / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY KALLISTA IMAGES / CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Fentanyl. Computer model of a molecule of Fentanyl (fentanil), an opioid analgesic drug. Atoms are represented as spheres with colour-coding: hydrogen (white), carbon (blue), oxygen (red), nitrogen (blue). Fentanyl is a rapid-acting synthetic painkiller which depresses central nervous system and respiratory function. It is used therapeutically to treat severe pain. It is also used illegally with effects similar to heroin.
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