Although the blockbuster antibiotic Zithromax is losing patent protection, Pfizer plans to launch a single-dose version of the drug.

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In the U.S. we've done single-dose studies, and they're nearly complete, and so far things have gone remarkably well.

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Single-dose models require loading capsules for each use.

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It will also provide a stereotactic radiosurgery service (SRS) which involves the precise delivery of a single fraction of high-dose radiation, usually within the skull.

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It has also opened the possibility of single dose vaccines with a long-term immunity response.

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The company says its Single Pose Secure scanner uses an extremely low-dose X-ray, equivalent to spending two minutes on an aircraft.

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In order to get a single therapeutic dose of bute from horsemeat you'd need to eat 500-600 250g horse burgers.

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There is no evidence that they have any benefits after a single dose, and the longer term benefits of treatment over periods of six-months or longer are minimal.

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Even subsistence fishermen, who eat far more fish than the typical American, would receive a dose of radiation from the cesium isotopes released in the meltdown equivalent to a single dental X-ray, Fisher and his colleagues reported.

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