In all seven cases, the chip delivered the correct dose of drugs to the patients, and no adverse side effects were reported.

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But every dose, delivered in America, comes with a stern warning of its potential side-effects.

ECONOMIST: Thalidomide

Tests in animals showed that one dose of axonally delivered pain medicine could last up to four days.

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On scan days, baseline scans were followed by intravenous administration of nicotine at a dose equivalent to the nicotine delivered by 1.5 cigarettes.

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Do you prefer to have a newspaper delivered to your room, or do you prefer a digital dose of morning news?

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But rotigotine has a distinct advantage: It's the first dopamine agonist to be delivered via a patch, thereby allowing patients to have a consistent dose of the drug in their systems at all times.

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If that is true, then certain drugs designed to affect the immune system might be more effective if delivered as small doses at different times, rather than as a single, continuous dose.

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