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![Close-up image of a joint being passed from one person's hands (on the right side of the image) to another (on the left side of the image). The hand on the left has a gold ringer on two fingers.](https://cdn.mos.cms.futurecdn.net/F2cNZ9U3aaf2ndW2MDFhcT-320-80.jpg)
Could cannabis treat cancer someday? Here's what the science says so far
By Emily Cooke published
For decades, cannabis has been studied for its potential antitumor properties, but whether it can actually treat cancer is still unknown.
![photo of young woman holding up a mouth spray in preparation to spritz it into her mouth](https://cdn.mos.cms.futurecdn.net/fTLM8jodNoLduxeVZmce46-320-80.jpg)
New UTI vaccine wards off infection for years, early studies suggest
By Sahana Sitaraman published
More than 50% of the patients who used a new mouth-spray-based vaccine didn't have a UTI for up to nine years.
![close up of a man's closed eye, showing his very, very long, dark and curly eyelashes](https://cdn.mos.cms.futurecdn.net/KnD8SFbQ8TfNXeHQP8j3kN-320-80.jpg)
Chemo side effect caused man's eyelash growth to go haywire
By Nicoletta Lanese published
Some medicines can inadvertently cause people's eyelashes to grow incredibly long.
![close up on a syringe in a gloved hand. A woman sitting in a chair can be seen blurred in the background, with the provider's other hand holding a cotton swab to her face](https://cdn.mos.cms.futurecdn.net/iYMKVNrYwjGnU5Tg52q7cK-320-80.jpg)
Fake Botox injections have sickened 22, hospitalized 11, CDC warns
By Nicoletta Lanese published
The CDC warned doctors about "counterfeit or mishandled" Botox injections that have caused clusters of illness in the U.S.
![illustration of red, y-shaped antibodies gathering around a large, blue nerve cell](https://cdn.mos.cms.futurecdn.net/hGCTByBukv2BqzWZdeuBHj-320-80.jpg)
1st-of-its-kind Parkinson's treatment may slow aggressive disease, trial hints
By Sneha Khedkar published
A new antibody drug for Parkinson's disease appears to slow the progression of its movement-related symptoms, at least in some patients.
![team of masked surgeons gathered around a bed and lowering an oxygen mask onto the viewer](https://cdn.mos.cms.futurecdn.net/EFRyHFXWqRFwVwcAjUiWf7-320-80.jpg)
How does anesthesia work?
By Christoph Schwaiger last updated
Different types of anesthesia work in distinct ways — but scientists don't fully understand all their effects.
![Medical illustration of a strand of messenger RNA (mRNA) in light blue against a gradient blue background](https://cdn.mos.cms.futurecdn.net/sq8XMBn9Z5WanXbEh7iCgV-320-80.jpg)
New mRNA therapy shows promise in treating 'ultrarare' inherited disease
By Emily Cooke published
Initial trial results suggest that a new mRNA therapy may be able to safely and effectively treat propionic acidemia, a rare metabolic disorder.
![Close-up photo of blue pills of Viagra in a silver pill packet with Pfizer written on them](https://cdn.mos.cms.futurecdn.net/nwqBD6u7piiZNQc8uxqwE3-320-80.jpg)
Does Viagra reduce the risk of Alzheimer's? Here's what we know.
By Emily Cooke last updated
Viagra is best known for triggering erections, but several studies have suggested that the drug may lower the risk of Alzheimer's disease. What do we know so far?
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