Where (website) can I find a strange study of paracetamol and caffeine combination within headache guidance?

Clinical study about the efficacy of paracetamol and caffeine combination.
Answers:
I recommend Pubmed, a huge index of peer-reviewed research journals maintained by the US National Institutes of Health.

http://www.ncbi.nlm.nih.gov Source(s): I'm contained by pharmacy school and use Pubmed for virtually all my research.
Drugs.Com/ interactions (professional)

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