As the population ages and rates of chronic disease rise, an increasing number of people are taking multiple pills for several conditions, often at different times throughout the day.

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Taking the right pill at the right time can be a hassle and potentially dangerous if a mistake is made. It is especially tough for people with dementia, for obvious reasons. It would be convenient and safe if people could take just one pill a day – a pill that delivers all the right medication at the right time in the right dose.

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Pills normally work by releasing drugs into the body when their outer shell is dissolved in the digestive system. The drug inside then enters the bloodstream. But a cleverly designed pill could have many layers. After the first drug has been released, the next shell of the pill is exposed, which then dissolves, releasing a different drug. […]

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