... opioid analgesics, becausethey share the ability to reduce fever.Acetaminophen (paracetamol) hasgood analgesic efficacy in toothaches and headaches, but is of little use in in-flammatory and ... horn. The axons of the second-or-der neurons cross the midline and as-cend to the brain as the anterolateralpathway or spinothalamic tract. Basedon phylogenetic age, neo- and paleospi-nothalamic ... drugs(NSAIDs). Today, more than 30 sub-stances are available, all of them sharing the organic acid nature of ASA. Structu-rally, they can be grouped into carbonicacids (e.g., diclofenac, ibuprofen,...