Yew is an evergreen tree. People use the bark, branch tips, and needles to make medicine. Paclitaxel (Taxol), a prescription drug for the treatment of breast and ovarian cancer, originally came from the bark of the yew tree. But now paclitaxel is made in a lab.

Despite serious safety concerns, yew is used for promoting menstruation and causing abortion, treating certain parasite infections, and many other conditions, but there is no good scientific evidence to support any of these uses.

How does it work ?

It is not known how yew might work as a medicine. The chemicals in yew are toxic, especially to cells in the heart. They cause the heart cells to work differently, making the heart beat faster and slower.

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