A modified tapeworm medication could be a promising new treatment for endometriosis, an early study in mice hints.

In endometriosis, tissue similar to the lining of the uterus grows outside the organ, and these patches of tissue, called "lesions," trigger painful inflammation and heavy menstrual bleeding. In the new study, scientists fitted an anti-worm drug with nanotech armor, and it directly targeted these painful lesions in laboratory mice.