| Virksomt stof | ATC-kode |
| Obeticholsyre | A05AA04 |
| Obeticholsyre | QA05AA04 |
| Obidoxim | QV03AB13 |
| Obidoxim | V03AB13 |
| Obiltoxaximab | J06BC04 |
| Obinutuzumab | L01FA03 |
| Obinutuzumab | QL01FA03 |
| Oblimersen | QL01XX36 |
| Oblimersen | L01XX36 |
| Oclacitinib | QD11AH90 |
| Ocrelizumab | QL04AG08 |
| Ocrelizumab | L04AG08 |
| Ocriplasmin | S01XA22 |
| Ocriplasmin | QS01XA22 |
| Octenidin | QR02AA21 |
| Octenidin | R02AA21 |
| Octenidin | A01AB24 |
| Octenidin | QA01AB24 |
| Octenidin, komb. | QD08AJ57 |
| Octenidin, komb. | D08AJ57 |
| Octenidin, kombinationer | G01AX66 |
| Octenidin, kombinationer | QG01AX66 |
| Octinoxat | D02BA02 |
| Octopamin | C01CA18 |
| Octopamin | QC01CA18 |
| Octreotid | QH01CB02 |
| Octreotid | H01CB02 |
| Octylmethoxycinnamat | QD02BA02 |
| Odevixibat | QA05AX05 |
| Odevixibat | A05AX05 |
| Odronextamab | L01FX34 |
| Ofatumumab | L01FA02 |
| Ofatumumab | L04AG12 |
| Ofatumumab | QL04AG12 |
| Ofatumumab | QL01FA02 |
| Ofloxacin | QJ01MA01 |
| Ofloxacin | J01MA01 |
| Ofloxacin | S02AA16 |
| Ofloxacin | S01AE01 |
| Ofloxacin | QS02AA16 |
| Ofloxacin | QS01AE01 |
| Ofloxacin og nitazoxanid | J01RA17 |
| Ofloxacin og ornidazol | J01RA09 |
| Ofloxacin og ornidazol | QJ01RA09 |
| Ofloxacin og tinidazol | J01RA18 |
| Oftalmologika | QS01 |
| Oftalmologika | S01 |
| Oftalmologika og otologika | S03 |
| Oftalmologika og otologika | QS03 |
| Olaflur | A01AA03 |
| Olaflur | QA01AA03 |
| Olanzapin | N05AH03 |
| Olanzapin | QN05AH03 |
| Olanzapin og samidorphan | QN05AH53 |
| Olanzapin og samidorphan | N05AH53 |
| Olaparib | QL01XK01 |
| Olaparib | L01XK01 |
| Olaquindox | QJ01MQ01 |
| Olaratumab | QL01FX10 |
| Olaratumab | L01FX10 |
| Oleandomycin | J01FA05 |
| Oleandomycin | QJ01FA05 |
| Oliceridin | N02AX07 |
| Oliceridin | QN02AX07 |
| Olie | A06AG06 |
| Olie | QA06AG06 |
| Olipudase alfa | QA16AB25 |
| Olipudase alfa | A16AB25 |
| Olmesartan medoxomil, amlodipin og hydrochlorthiazid | C09DX03 |
| Olmesartan medoxomil, amlodipin og hydrochlorthiazid | QC09DX03 |
| Olmesartanmedoxomil | QC09CA08 |
| Olmesartanmedoxomil | C09CA08 |
| Olmesartanmedoxomil og amlodipin | C09DB02 |
| Olmesartanmedoxomil og amlodipin | QC09DB02 |
| Olmesartanmedoxomil og diuretika | QC09DA08 |
| Olmesartanmedoxomil og diuretika | C09DA08 |
| Olmutinib | L01EB06 |
| Olmutinib | QL01EB06 |
| Olodaterol | QR03AC19 |
| Olodaterol | R03AC19 |
| Olodaterol og tiotropiumbromid | R03AL06 |
| Olodaterol og tiotropiumbromid | QR03AL06 |
| Olokizumab | QL04AC23 |
| Olokizumab | L04AC23 |
| Olopatadin | QS01GX09 |
| Olopatadin | R01AC08 |
| Olopatadin | S01GX09 |
| Olsalazin | A07EC03 |
| Olutasidenib | L01XM03 |
| Omacetaxin mepesuccinat | QL01XX40 |
| Omacetaxine mepesuccinat | L01XX40 |
| Omadacyclin | J01AA15 |
| Omadacyclin | QJ01AA15 |
| Omalizumab | R03DX05 |
| Omalizumab | QR03DX05 |
| Ombitasvir, paritaprevir og ritonavir | QJ05AP53 |
| Ombitasvir, paritaprevir og ritonavir | J05AP53 |
| Omecamtiv mecarbil | C01CX10 |
| Omecamtiv mecarbil | QC01CX10 |
| Omega-3-triglycerider inkl. andre estre og syrer | QC10AX06 |
| Omega-3-triglycerider inkl. andre estre og syrer | C10AX06 |
| Omeprazol | A02BC01 |
| Omeprazol | QA02BC01 |
| Omeprazol, amoxicillin og clarithromycin | QA02BD05 |
| Omeprazol, amoxicillin og clarithromycin | A02BD05 |
| Omeprazol, amoxicillin og metronidazol | A02BD01 |
| Omeprazol, amoxicillin og metronidazol | QA02BD01 |
| Omeprazol, amoxicillin og rifabutin | QA02BD16 |
| Omeprazol, amoxicillin og rifabutin | A02BD16 |
| Omeprazol, kombinationer | A02BC51 |
| Omeprazol, kombinationer | QA02BC51 |
| Omidenepag | QS01EX06 |
| Omidenepag | S01EX06 |
| Omoconazol | QD01AC13 |
| Omoconazol | QG01AF16 |
| Omoconazol | G01AF16 |
| Omoconazol | D01AC13 |
| Onasemnogenabeparvovec | M09AX09 |
| Onasemnogenabeparvovec | QM09AX09 |
| Ondansetron | QA04AA01 |
| Ondansetron | A04AA01 |
| Ondelopran | N07BB06 |
| Opicapon | N04BX04 |
| Opicapon | QN04BX04 |
| Opinercept | L04AB07 |
| Opinercept | QL04AB07 |
| Opioid-anæstetika | QN01AH |
| Opioid-anæstetika | N01AH |
| Opioider | N02A |
| Opioider | QN02A |
| Opioider i komb. med antispasmodika | QN02AG |
| Opioider i komb. med antispasmodika | N02AG |
| Opioider i kombination med non-opioide analgetika | N02AJ |
| Opioider i kombination med non-opioide analgetika | QN02AJ |
| Opipramol | N06AA05 |
| Opipramol | QN06AA05 |
| Opium | QN02AA02 |
| Opium | QA07DA02 |
| Opium | N02AA02 |
| Opium | A07DA02 |
| Opiumalkaloider med morphin | R05DA05 |
| Opium-alkaloider med morphin | QR05DA05 |
| Opiumalkaloider og derivater | R05DA |
| Opium-alkaloider og derivater | QR05DA |
| Opium-alkaloider og derivater i komb. | QR05DA20 |
| Opium-alkaloider og mucolytika | QR05FA01 |
| Opiumderivater og expectorantia | R05FA |
| Opiumderivater og expectorantia | R05FA02 |
| Opium-derivater og expectorantia | QR05FA02 |
| Opium-derivater og expectorantia | QR05FA |
| Opiumderivater og mucolytika | R05FA01 |
| Opløsninger med virkning på elektrolytbalancen | B05BB |
| Opløsninger med virkning på elektrolytbalancen | QB05BB |
| Opløsninger til intravenøs brug | QB05B |
| Opløsninger til osmotisk diurese | QB05BC |
| Opløsninger til osmotisk diurese | B05BC |
| Opløsninger til parenteral ernæring | B05BA |
| Opløsninger til parenteral ernæring | QB05BA |
| Opløsnings- og fortyndingsmidler, incl. skyllevæsker | QV07AB |
| Opløsnings-og fortyndingsmidler, incl. skyllevæsker | V07AB |
| Oportuzumab monatox | QL01FX16 |
| Oportuzumab monatox | L01FX16 |
| Oprelvekin | L03AC02 |
| Oprelvekin | QL03AC02 |
| Orale elektrolytter | QA07CQ01 |
| Orale elektrolytter og kulhydrater | QA07CQ02 |
| Orale rehydreringsmidler til veterinært brug | QA07CQ |
| Orale rehydreringssalt-formuleringer | A07CA |
| Orbifloxacin | QJ01MA95 |
| Orciprenalin | R03AB03 |
| Orciprenalin | R03CB03 |
| Orciprenalin | QR03CB03 |
| Orciprenalin | QR03AB03 |
| Orciprenalin, komb. | QR03CB53 |
| Orciprenalin, kombinationer | R03CB53 |
| Orelabrutinib | QL01EL04 |
| Orelabrutinib | L01EL04 |
| Orexinreceptor antagonister | N05CJ |
| Orexinreceptor antagonister | QN05CJ |
| Orf virus+smitsom pustular dermatitis virus vaccine | QI04AD01 |
| Organiske nitrater | QC01DA |
| Organiske nitrater | C01DA |
| Organiske nitrater i komb. | QC01DA20 |
| Organiske nitrater i komb. m. psykoleptika | QC01DA70 |
| Organiske nitrater i kombinationer | C01DA20 |
| Organiske phosphorforbindelser | QP52AB |
| Organiske phosphorforbindelser | QP53AF |
| Organiske phosphorforbindelser | QP53BB |
| Organiske phosphor-forbindelser | P02BB |
| Organiske syrer | QG01AD |
| Organiske syrer | G01AD |
| Organiske syrer | QP53AG |
| Organo-heparinoid | C05BA01 |
| Orgotein | M01AX14 |
| Orgotein | QM01AX14 |
| Oripavin-derivater | QN02AE |
| Oripavin-derivater, kombinationer | QN02AE99 |
| Oripavine-derivater | N02AE |
| Oritavancin | J01XA05 |
| Oritavancin | QJ01XA05 |
| Orlistat | QA08AB01 |
| Orlistat | A08AB01 |
| Ormeloxifen | G03XC04 |
| Ormeloxifen | QG03XC04 |
| Ornidazol | QG01AF06 |
| Ornidazol | QJ01XD03 |
| Ornidazol | P01AB03 |
| Ornidazol | G01AF06 |
| Ornidazol | J01XD03 |
| Ornidazol | QP51AA03 |
| Ornipressin | H01BA05 |
| Ornipressin | QH01BA05 |
| Ornithinoxoglurat | QA05BA06 |
| Ornithinoxoglurat | A05BA06 |
| Ornithobacterium vaccine | QI01AB07 |
| Orphenadrin (chlorid) | N04AB02 |
| Orphenadrin (citrat) | QM03BC01 |
| Orphenadrin (citrat) | M03BC01 |
| Orphenadrin, komb. | QM03BC51 |
| Orphenadrin, kombinationer | M03BC51 |
| Osateron | QG04CX90 |
| Oseltamivir | QJ05AH02 |
| Oseltamivir | J05AH02 |
| Osilodrostat | H02CA02 |
| Osilodrostat | QH02CA02 |
| Osimertinib | QL01EB04 |
| Osimertinib | L01EB04 |
| Osmotisk virkende laksantia | A06AD |
| Osmotisk virkende laxantia | QA06AD |
| Ospemifen | QG03XC05 |
| Ospemifen | G03XC05 |
| Oteseconazol | J02AC06 |
| Oteseconazol | QJ02AC06 |
| Other antiprotozoal agents | QP51AX |
| Otiloniumbromid | QA03AB06 |
| Otiloniumbromid | A03AB06 |
| Otiloniumbromid og psykoleptika | A03CA04 |
| Otologika | QS02 |
| Otologika | S02 |
| Overførbar gastroenteritis (tge) virus vaccine | QI09AD02 |
| Ovulationsstimulerende midler, syntetiske | QG03GB |
| Ovulationsstimulerende midler, syntetiske | G03GB |
| Oxaboloncipionat | A14AB03 |
| Oxaboloncipionat | QA14AB03 |
| Oxaceprol | QD11AX09 |
| Oxaceprol | QM01AH01 |
| Oxaceprol | D11AX09 |
| Oxaceprol | M01AX24 |
| Oxacillin | J01CF04 |
| Oxacillin | QJ51CF04 |
| Oxacillin | QJ01CF04 |
| Oxaflozan | N06AX10 |
| Oxaflozan | QN06AX10 |
| Oxaliplatin | QL01XA03 |
| Oxaliplatin | L01XA03 |
| Oxalsyre | QP53AG03 |
| Oxametacin | M01AB13 |
| Oxametacin | QM01AB13 |
| Oxamniquin | P02BA02 |
| Oxamniquin | QP52AA02 |
| Oxandrolon | QA14AA08 |
| Oxandrolon | A14AA08 |
| Oxantel | P02CC02 |
| Oxantel | QP52AF03 |
| Oxaprozin | QM01AE12 |
| Oxaprozin | M01AE12 |
| Oxatomid | QR06AE06 |
| Oxatomid | R06AE06 |
| Oxazepam | QN05BA04 |
| Oxazepam | N05BA04 |
| Oxazol-, thiazin-, triazin-derivater | M03BB |
| Oxazol-, thiazin-, triazin-derivater | QM03BB |
| Oxazolidin-derivater | QN03AC |
| Oxazolidin-derivater | N03AC |
| Oxcarbazepin | N03AF02 |
| Oxcarbazepin | QN03AF02 |
| Oxedrin | QS01GA06 |
| Oxedrin | S01GA06 |
| Oxedrin | C01CA08 |
| Oxedrin | QC01CA08 |
| Oxedrin (ban) | QS01FB90 |
| Oxedrin, komb. | QS01GA56 |
| Oxedrin, kombinationer | S01GA56 |
| Oxeladin | R05DB09 |
| Oxeladin | QR05DB09 |
| Oxetacain | C05AD06 |
| Oxetoron | N02CX06 |
| Oxetoron | QN02CX06 |
| Oxfendazol | QP52AC02 |
| Oxfendazol, komb. | QP52AC52 |
| Oxibendazol | QP52AC57 |
| Oxibendazol | QP52AC07 |
| Oxicamer | M01AC |
| Oxicamer | QM01AC |
| Oxiconazol | QG01AF17 |
| Oxiconazol | QD01AC11 |
| Oxiconazol | D01AC11 |
| Oxiconazol | G01AF17 |
| Oxideret cellulose | B02BC02 |
| Oxideret cellulose | QB02BC02 |
| Oxiracetam | N06BX07 |
| Oxitriptan | N06AX01 |
| Oxitriptan | QN06AX01 |
| Oxitropiumbromid | QR03BB02 |
| Oxitropiumbromid | R03BB02 |
| Oxolamin | R05DB07 |
| Oxolamin | QR05DB07 |
| Oxolinsyre | QJ01MB05 |
| Oxolinsyre | J01MB05 |
| Oxomemazin | QR06AD08 |
| Oxomemazin | R06AD08 |
| Oxprenolol | C07AA02 |
| Oxprenolol | QC07AA02 |
| Oxprenolol og andre diuretika | C07CA02 |
| Oxprenolol og thiazider | C07BA02 |
| Oxybuprocain | D04AB03 |
| Oxybuprocain | QD04AB03 |
| Oxybuprocain | S01HA02 |
| Oxybuprocain | QS01HA02 |
| Oxybutynin | QG04BD04 |
| Oxybutynin | G04BD04 |
| Oxycinchophen | M01CA03 |
| Oxyclozanid | QP52AG06 |
| Oxycodon | QN02AA05 |
| Oxycodon | N02AA05 |
| Oxycodon og acetylsalicylsyre | N02AJ18 |
| Oxycodon og acetylsalicylsyre | QN02AJ18 |
| Oxycodon og ibuprofen | QN02AJ19 |
| Oxycodon og ibuprofen | N02AJ19 |
| Oxycodon og naloxon | N02AA55 |
| Oxycodon og naloxon | QN02AA55 |
| Oxycodon og naltrexon | QN02AA56 |
| Oxycodon og naltrexon | N02AA56 |
| Oxycodon og paracetamol | N02AJ17 |
| Oxycodon og paracetamol | QN02AJ17 |
| Oxyfedrin | QC01DX03 |
| Oxyfedrin | C01DX03 |
| Oxyfedrin, komb. | QC01DX53 |
| Oxyfedrin, kombinationspræparater | C01DX53 |
| Oxygen | QV03AN01 |
| Oxygen | V03AN01 |
| Oxymetazolin | S01GA04 |
| Oxymetazolin | R01AA05 |
| Oxymetazolin | R01AB07 |
| Oxymetazolin | QS01GA04 |
| Oxymetazolin | QR01AB07 |
| Oxymetazolin | QR01AA05 |
| Oxymetazolin | D11AX27 |
| Oxymetazolin | QD11AX27 |
| Oxymetholon | QA14AA05 |
| Oxymetholon | A14AA05 |
| Oxymorphon | N02AA11 |
| Oxymorphon | QN02AA11 |
| Oxypertin | QN05AE01 |
| Oxypertin | N05AE01 |
| Oxyphenbutazon | M01AA03 |
| Oxyphenbutazon | M02AA04 |
| Oxyphenbutazon | QM01AA03 |
| Oxyphenbutazon | QM02AA04 |
| Oxyphenbutazon | QS01BC02 |
| Oxyphencyclimin | QA03AA01 |
| Oxyphencyclimin | A03AA01 |
| Oxyphencyclimin og psykoleptika | A03CA03 |
| Oxyphenisatin | A06AB01 |
| Oxyphenisatin | QA06AB01 |
| Oxyphenon | QA03AB03 |
| Oxyphenon | A03AB03 |
| Oxyphenon, kombinationer | QA03AB53 |
| Oxyphenon, kombinationspræparater | A03AB53 |
| Oxyphenylbutazon | S01BC02 |
| Oxyquinolin | R02AA14 |
| Oxyquinolin | A01AB07 |
| Oxyquinolin | G01AC30 |
| Oxyquinolin | D08AH03 |
| Oxyquinolin | QA01AB07 |
| Oxyquinolin | QG01AC30 |
| Oxyquinolin | QD08AH03 |
| Oxytetracyclin | QD06AA03 |
| Oxytetracyclin | QA01AB25 |
| Oxytetracyclin | QJ51AA06 |
| Oxytetracyclin | QG01AA07 |
| Oxytetracyclin | QG51AA01 |
| Oxytetracyclin | QJ01AA06 |
| Oxytetracyclin | G01AA07 |
| Oxytetracyclin | D06AA03 |
| Oxytetracyclin | A01AB25 |
| Oxytetracyclin | J01AA06 |
| Oxytetracyclin | S01AA04 |
| Oxytetracyclin | QS01AA04 |
| Oxytetracyclin, kombinationer | J01AA56 |
| Oxytetracyclin, kombinationer | QJ01AA56 |
| Oxytetracyclin, kombinationer | QD06AA53 |
| Oxytetracycline og neomycin | QG51AG06 |
| Oxytocica | QG02A |
| Oxytocin | QH01BB02 |
| Oxytocin | H01BB02 |
| Oxytocin og analoger | H01BB |
| Oxytocin og derivater | QH01BB |
| Ozanimod | QL04AE02 |
| Ozanimod | L04AE02 |
| Ozenoxacin | D06AX14 |
| Ozenoxacin | QD06AX14 |
