why do they put caffeine in painkillers ?

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CryptoGuru2023

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Why do they put caffeine in painkillers?
Caffeine is added to some painkillers, such as paracetamol and ibuprofen, to help them work better. A recent Cochrane review of evidence found that added caffeine had a small but significant effect, amounting to an additional 5-10% of patients achieving a good level of pain relief.
 

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