If you're looking for a product to help with more significant discomfort, over-the-counter pain relievers such as acetaminophen or ibuprofen given in the appropriate dose for a child's weight can take the edge off of teething pain.

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University of Florida clinical pharmacists pointed out as early as 2006 that the dose of phenylephrine approved for over-the-counter use is ineffective.

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This study does not settle another question - whether daily low dose aspirin can help prevent cancer over the long term.

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Alas, such are the powerful entrenched interests in drugmaking that it will take something stronger than a dose of information to calm the current fever over pill-pricing.

ECONOMIST: The cost of drugs

In the 4, 162-person PROVEIT study, Harvard cardiologists found that patients hospitalized for heart attacks or unstable angina who took a 80-milligram dose of Lipitor were 16% less likely to suffer heart attacks or other cardiovascular "events" over two years than those who took a lower dose of Bristol-Myers Squibb 's (nyse: BMY - news - people ) Pravachol.

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At present, while high-dose vitamins and minerals are readily available in the UK, over-the-counter sales are already outlawed in most EU countries, leading to a "black market" in vitamins with the UK as its source.

BBC: Clampdown on 'high-dose' vitamins

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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