摘要: Caffeine, an antagonist of adenosine A1, A2A and A2B receptors, is known as adjuvant analgesic in combination with non-steroidal anti-inflammatory drugs (NSAIDs) acetaminophen humans. In preclinical studies, caffeine produces intrinsic antinociceptive effects several rodent models, augments the actions NSAIDs acetaminophen. Antagonism well inhibition cyclooxygenase activity at some sites, may explain actions. When combined morphine, can augment, inhibit or have no effect depending on dose, route administration, nociceptive test species; reflects spinal A1 while augmentation reflect noted above. Low doses given systemically antinociception by analgesics (acetaminophen, amitriptyline, oxcarbazepine, cizolirtine), probably reflecting block a component action involving receptors. Clinical studies demonstrated analgesia, treatment headache conditions, but not postoperative pain. Caffeine clearly exhibits complex pain transmission; knowledge such important for understanding analgesia considering situations which dietary intake impact regimens.