Light-activated drug could reduce side effects of diabetes medication

Scientists have created a drug for type 2 diabetes that is switched on by blue light, which they hope will improve treatment of the disease. The drug would be inactive under normal conditions, but a patient could in theory switch it on using blue LEDs stuck to the skin. Only a small amount of light would need to penetrate the skin to change the drug's shape and turn it on. This change is reversible, so the drug switches off again when the light goes off.

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