But the combination of rest and painkilling injections could not get him through the Ashes campaign.
Neuro-imaging shows that this deception stimulates the production of naturally occurring painkilling chemicals in the brain.
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Caffeine is already included as an ingredient in some painkilling tablets - but only in relatively small doses.
Most of the painkilling effects of codeine are due to some of it being converted to the strong opioid analgesic, morphine.
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The painkilling medicine often used on horses is commonly known as "bute".
The pain in the lower left of his back has caused Murray discomfort since late 2011 and is the same injury which required a painkilling injection at last year's French Open.
The family of former Rangers enforcer Derek Boogaard, who died in May 2011 after overdosing on alcohol and painkilling medication, has filed a wrongful-death lawsuit against the NHL, one of the family's attorneys confirmed Sunday.
"I don't know what other teams had, but I'm sure they had something that was similar, " he said, referring to the place at stadiums that players visited on game days to receive a series of painkilling shots.
He also claimed that some women might feel inhibited in the presence of their partner, and this might lead them to opt for a Caesarean, or for painkilling drugs, when they might otherwise persevere with a natural delivery.
Verbeek said the 21-year-old was not fit enough after playing through the season with painkilling injections to help a pelvic problem, despite the Dutchman having warned manager Gordon Strachan of English second division side Middlesbrough of the dangers.
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