Imagine a doctor telling you she is deliberately prescribing an excessive dose of a drug because she prescribed too weak a dose the last time.

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Another wrinkle: Asians initially should be prescribed the lowest dose of Crestor.

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One mother featured on the programme was told her son had been prescribed too high a dose of Ritalin and it was to be halved.

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The FDA said that 2.1 million people had been prescribed the 80 milligram dose, either by itself or in a combination pill like Vytorin or Simcor, last year.

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The pump can be programmed to give a specific insulin dose at a prescribed time.

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That means the 80 milligram dose of simvastatin was prescribed more times than all doses of Vytorin, which was prescribed 8.6 million times last year.

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Others fill the prescriptions and dose themselves at levels lower than prescribed, taking a half pill, say, instead of a whole one.

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