The efficacy of paracetamol is reduced by  centrally acting anti-emetics.
Chawla
Girish
G
University of Warwick Medical School, Coventry, UK. drgirishchawla2003@yahoo.co.uk
D000082:Acetaminophen / Q000494:pharmacology*; D018712:Analgesics, Non-Narcotic / Q000494:pharmacology*; D000932:Antiemetics / Q000494:pharmacology*; D004347:Drug Interactions; D006801:Humans
D018712:Analgesics, Non-Narcotic; D000932:Antiemetics; D000082:Acetaminophen