atc code n02 atc code n02 atc code n02 analgesics is a therapeutic subgroup of the anatomical therapeutic chemical classification system, a system of alphanumeric codes developed by the world health organization (who) for the classification of drugs and other medical products. subgroup n02 is part of the anatomical group n nervous system. atc codes n nervous system n01 anesthetics n02 analgesics n03 antiepileptics n04 anti-parkinson drugs n05 psycholeptics n06 psychoanaleptics n07 other nervous system drugs atcvet only qn51 products for animal euthanasia a b c d g h qi j l m n p r s v codes for veterinary use (atcvet codes) can be created by placing the letter q in front of the human atc code: for example, qn02. atcvet codes without corresponding human atc codes are cited with the leading q in the following list.national issues of the atc classification may include additional codes not present in this list, which follows the who version. n02a opioids n02aa natural opium alkaloids n02aa01 morphine n02aa02 opium n02aa03 hydromorphone n02aa04 nicomorphine n02aa05 oxycodone n02aa08 dihydrocodeine n02aa10 papaveretum n02aa11 oxymorphone n02aa51 morphine, combinations n02aa53 hydromorphone and naloxone n02aa55 oxycodone and naloxone n02aa56 oxycodone and naltrexone n02aa58 dihydrocodeine, combinations n02aa59 codeine, combinations excluding psycholeptics n02aa79 codeine, combinations with psycholeptics n02ab phenylpiperidine derivatives n02ab01 ketobemidone n02ab02 pethidine n02ab03 fentanyl n02ab52 pethidine, combinations excluding psycholeptics qn02ab53 fentanyl, combinations excluding psycholeptics n02ab72 pethidine, combinations with psycholeptics qn02ab73 fentanyl, combinations with psycholeptics n02ac diphenylpropylamine derivatives n02ac01 dextromoramide n02ac03 piritramide n02ac04 dextropropoxyphene n02ac05 bezitramide n02ac52 methadone, combinations excluding psycholeptics n02ac54 dextropropoxyphene, combinations excluding psycholeptics n02ac74 dextropropoxyphene, combinations with psycholeptics qn02ac90 methadone n02ad benzomorphan derivatives n02ad01 pentazocine n02ad02 phenazocine n02ae oripavine derivatives n02ae01 buprenorphine qn02ae90 etorphine qn02ae99 oripavine derivatives, combinations n02af morphinan derivatives n02af01 butorphanol n02af02 nalbuphine n02ag opioids in combination with antispasmodics n02ag01 morphine and antispasmodics n02ag02 ketobemidone and antispasmodics n02ag03 pethidine and antispasmodics n02ag04 hydromorphone and antispasmodics n02aj opioids in combination with non-opioid analgesics n02aj01 dihydrocodeine and paracetamol n02aj02 dihydrocodeine and acetylsalicylic acid n02aj03 dihydrocodeine and other non-opioid analgesics n02aj06 codeine and paracetamol n02aj07 codeine and acetylsalicylic acid n02aj08 codeine and ibuprofen n02aj09 codeine and other non-opioid analgesics n02aj13 tramadol and paracetamol n02aj14 tramadol and dexketoprofen n02aj15 tramadol and other non-opioid analgesics n02aj16 tramadol and celecoxib n02aj17 oxycodone and paracetamol n02aj18 oxycodone and acetylsalicylic acid n02aj19 oxycodone and ibuprofen n02ax other opioids n02ax01 tilidine n02ax02 tramadol n02ax03 dezocine n02ax05 meptazinol n02ax06 tapentadol n02ax07 oliceridine n02ax51 tilidine and naloxone n02b other analgesics and antipyretics n02ba salicylic acid and derivatives n02ba01 acetylsalicylic acid n02ba02 aloxiprin n02ba03 choline salicylate n02ba04 sodium salicylate n02ba05 salicylamide n02ba06 salsalate n02ba07 ethenzamide n02ba08 morpholine salicylate n02ba09 dipyrocetyl n02ba10 benorilate n02ba11 diflunisal n02ba12 potassium salicylate n02ba14 guacetisal n02ba15 carbasalate calcium n02ba16 imidazole salicylate n02ba51 acetylsalicylic acid, combinations excluding psycholeptics n02ba55 salicylamide, combinations excluding psycholeptics n02ba57 ethenzamide, combinations excluding psycholeptics n02ba59 dipyrocetyl, combinations excluding psycholeptics n02ba65 carbasalate calcium combinations excluding psycholeptics n02ba71 acetylsalicylic acid, combinations with psycholeptics n02ba75 salicylamide, combinations with psycholeptics n02ba77 ethenzamide, combinations with psycholeptics n02ba79 dipyrocetyl, combinations with psycholeptics n02bb pyrazolones n02bb01 phenazone n02bb02 metamizole n02bb03 aminophenazone n02bb04 propyphenazone n02bb05 nifenazone n02bb51 phenazone, combinations excluding psycholeptics n02bb52 metamizole sodium, combinations excluding psycholeptics n02bb53 aminophenazone, combinations excluding psycholeptics n02bb54 propyphenazone, combinations excluding psycholeptics n02bb71 phenazone, combinations with psycholeptics n02bb72 metamizole sodium, combinations with psycholeptics n02bb73 aminophenazone, combinations with psycholeptics n02bb74 propyphenazone, combinations with psycholeptics n02be anilides n02be01 paracetamol n02be03 phenacetin n02be04 bucetin n02be05 propacetamol n02be51 paracetamol, combinations excluding psycholeptics n02be53 phenacetin, combinations excluding psycholeptics n02be54 bucetin, combinations excluding psycholeptics n02be71 paracetamol, combinations with psycholeptics n02be73 phenacetin, combinations with psycholeptics n02be74 bucetin, combinations with psycholeptics n02bf gabapentinoids n02bf01 gabapentin n02bf02 pregabalin n02bf03 mirogabalin n02bg other analgesics and antipyretics n02bg02 rimazolium n02bg03 glafenine n02bg04 floctafenine n02bg05 viminol n02bg06 nefopam n02bg07 flupirtine n02bg08 ziconotide n02bg09 methoxyflurane n02bg10 cannabinoids (includes nabiximols) n02bg12 tanezumab qn02bg90 frunevetmab qn02bg91 bedinvetmab n02c antimigraine preparations n02ca ergot alkaloids n02ca01 dihydroergotamine n02ca02 ergotamine n02ca04 methysergide n02ca07 lisuride n02ca51 dihydroergotamine, combinations n02ca52 ergotamine, combinations excluding psycholeptics n02ca72 ergotamine, combinations with psycholeptics n02cb corticosteroid derivatives n02cb01 flumedroxone n02cc selective serotonin (5-ht1) agonists n02cc01 sumatriptan n02cc02 naratriptan n02cc03 zolmitriptan n02cc04 rizatriptan n02cc05 almotriptan n02cc06 eletriptan n02cc07 frovatriptan n02cc08 lasmiditan n02cd calcitonin gene-related peptide (cgrp) antagonists n02cd01 erenumab n02cd02 galcanezumab n02cd03 fremanezumab n02cd04 ubrogepant n02cd05 eptinezumab n02cd06 rimegepant n02cd07 atogepant n02cx other antimigraine preparations n02cx01 pizotifen n02cx02 clonidine n02cx03 iprazochrome n02cx05 dimetotiazine n02cx06 oxetorone