Page last updated at 12:10 GMT, Thursday, 23 April 2009 13:10 UK

Professor Regan's sleep remedy

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In a new BBC Two series Professor Lesley Regan goes behind the pharmacy counter to find out if the money we spend every year on products from cold remedies to herbal medicines is worth it.

In this experiment she attempts to help a group of volunteers suffering from insomnia with a remedy of her own invention, and some scientific jargon.

Professor Regan's Medicine Cabinet is on BBC Two at 2100 BST, on Thursday, 23 April.

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