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Calabar beans

Calabar beans

B640/0210

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Credit

JERRY MASON / SCIENCE PHOTO LIBRARY JERRY MASON / SCIENCE PHOTO LIBRARY

Caption

Calabar beans. Calabar beans (Physostigma venenosum) in their pods. These beans are the source of the drug physostigmine. This is used in the treatment of glaucoma, where a preparation is dropped directly onto the eyeball. It also acts as a muscle relaxant, and has been used to treat epilepsy, tetanus and constipation. Overdoses of physostigmine can be fatal.

Release details

Model release not required. Property release not required.

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