Ein Paarvergleich findet Originalpassagen, die den anderen Wirkstoff wörtlich nennen. Aussagen gelten für das jeweilige Präparat und seine Formulierung. Klassenbegriffe und abweichende Synonyme können fehlen. Kein Treffer bedeutet nicht, dass keine Wechselwirkung besteht.
RxNorm 05-Oct-2026 · geprüft 2026-10-25 · 1009 Präparate · 54812 Quellenpassagen · 148 strukturierte Aussagen. Automatisch aktualisiert, ohne menschliche Freigabe.
Wechselwirkungen · Vfend
VFEND 40 mg/ml powder for oral suspension · Abschnitt 4.5 · PDF-Seite 76–77
HOS-109604 · Präparat HOS-093201
300 mg QD (coadministered Phenytoin Cmax 67% Phenytoin may be
with voriconazole 400 mg Phenytoin AUC 81% coadministered with
BID)* Compared to voriconazole 200 mg voriconazole if the maintenance
BID, dose of voriconazole is increased
Voriconazole Cmax 34% to 5 mg/kg IV BID or from
Voriconazole AUC 39% 200 mg to 400 mg oral BID
(100 mg to 200 mg oral BID in
patients less than 40 kg) (see
section 4.2).
76
Antidiabetics
Sulfonylureas (including but Although not studied, voriconazole Careful monitoring of blood
not limited to: tolbutamide, is likely to increase the plasma glucose is recommended. Dose
glipizide, glyburide) concentrations of sulfonylureas and reduction of sulfonylureas should
[CYP2C9 substrates] cause hypoglycaemia. be considered.
Anti-fungals
Fluconazole (200 mg QD) Voriconazole Cmax 57% The reduced dose and/or
[CYP2C9, CYP2C19 and Voriconazole AUC 79% frequency of voriconazole and
CYP3A4 inhibitor] Fluconazole Cmax ND fluconazole that would eliminate
Fluconazole AUC ND this effect have not been
established. Monitoring for
voriconazole-associated adverse
reactions is recommended if
voriconazole is used sequentially
after fluconazole.
Antihistamines
Astemizole Although not studied, increased Contraindicated (see section
[CYP3A4 substrate] plasma concentrations of 4.3)
astemizole can lead to QTc
prolongation and rare occurrences
of torsades de pointes.
Terfenadine Although not studied, increased Contraindicated (see section
[CYP3A4 substrate] plasma concentrations of 4.3)
terfenadine can lead to QTc
prolongation and rare occurrences
of torsades de pointes.
Anti HIV agents
Indinavir (800 mg TID) Indinavir Cmax ↔ No dose adjustment
[CYP3A4 inhibitor and Indinavir AUC ↔
substrate] Voriconazole Cmax ↔
Voriconazole AUC ↔
Ritonavir (protease inhibitor)
[potent CYP450 inducer;
CYP3A4 inhibitor and
substrate]
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): glipizide (HOS-109460) indinavir (HOS-084518) protease (HOS-085623) glucose (HOS-088412) lead (HOS-085592) glyburide (HOS-109273) fluconazole (HOS-087945) astemizole (HOS-085608) ritonavir (HOS-084521) terfenadine (HOS-085607) phenytoin (HOS-084531) tolbutamide (HOS-086568)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-07-21T15:15:00Z · SHA-256 e91b23f050e51d641bef6be84ca7a49bb0e71d249b5c23f29243dda478d37eaf · Passage f19ccc38aa29c7c75168a00762b93a1ec1fb9ac13e31bd781df6a45a736467a1 · Zeichen 11616–14918 im Abschnitt
Wechselwirkungen · Tracleer
Tracleer 62.5 mg film-coated tablets Tracleer 125 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 8
HOS-109926 · Präparat HOS-093279
Rifampicin: Co-administration in 9 healthy subjects for 7 days of bosentan 125 mg twice daily with
rifampicin, a potent inducer of CYP2C9 and CYP3A4, decreased the plasma concentrations of
bosentan by 58%, and this decrease could achieve almost 90% in an individual case. As a result, a
significantly reduced effect of bosentan is expected when it is co-administered with rifampicin.
Concomitant use of rifampicin and Tracleer is not recommended. Data on other CYP3A4 inducers,
e.g., carbamazepine, phenobarbital, phenytoin and St. John’s wort are lacking, but their concomitant
administration is expected to lead to reduced systemic exposure to bosentan. A clinically significant
reduction of efficacy cannot be excluded.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) lead (HOS-085592) bosentan (HOS-086291) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2024-10-25T15:01:00Z · SHA-256 eddfcd40df26bd01c2c7847da53c544c94e0bafb8bcc62374b5c7788669470bc · Passage a30be20bb22004903f151f7e54a6dd8796bf6a4aaf6a5fc5d7df9c1a1589bcfd · Zeichen 3248–3970 im Abschnitt
Wechselwirkungen · Tracleer
Tracleer 32 mg dispersible tablets · Abschnitt 4.5 · PDF-Seite 31
HOS-109979 · Präparat HOS-093279
Rifampicin: Co-administration in 9 healthy subjects for 7 days of bosentan 125 mg twice daily with
rifampicin, a potent inducer of CYP2C9 and CYP3A4, decreased the plasma concentrations of
bosentan by 58%, and this decrease could achieve almost 90% in an individual case. As a result, a
significantly reduced effect of bosentan is expected when it is co-administered with rifampicin.
Concomitant use of rifampicin and Tracleer is not recommended. Data on other CYP3A4 inducers,
e.g., carbamazepine, phenobarbital, phenytoin and St. John’s wort are lacking, but their concomitant
administration is expected to lead to reduced systemic exposure to bosentan. A clinically significant
reduction of efficacy cannot be excluded.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) lead (HOS-085592) bosentan (HOS-086291) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2024-10-25T15:01:00Z · SHA-256 eddfcd40df26bd01c2c7847da53c544c94e0bafb8bcc62374b5c7788669470bc · Passage a30be20bb22004903f151f7e54a6dd8796bf6a4aaf6a5fc5d7df9c1a1589bcfd · Zeichen 3191–3913 im Abschnitt
Wechselwirkungen · Glivec
Glivec 100 mg film-coated tablets Glivec 400 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 10
HOS-110221 · Präparat HOS-093339
Substances that are inducers of CYP3A4 activity (e.g. dexamethasone, phenytoin, carbamazepine,
rifampicin, phenobarbital, fosphenytoin, primidone or Hypericum perforatum, also known as St.
John’s Wort) may significantly reduce exposure to Glivec, potentially increasing the risk of
therapeutic failure. Pretreatment with multiple doses of rifampicin 600 mg followed by a single
400 mg dose of Glivec resulted in decrease in Cmax and AUC(0-∞) by at least 54% and 74%, of the
respective values without rifampicin treatment. Similar results were observed in patients with
malignant gliomas treated with Glivec while taking enzyme-inducing anti-epileptic drugs (EIAEDs)
such as carbamazepine, oxcarbazepine and phenytoin. The plasma AUC for imatinib decreased by
73% compared to patients not on EIAEDs. Concomitant use of rifampicin or other strong CYP3A4
inducers and imatinib should be avoided.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): fosphenytoin (HOS-110222) phenobarbital (HOS-085617) carbamazepine (HOS-085618) dexamethasone (HOS-084535) oxcarbazepine (HOS-110224) phenytoin (HOS-084531) primidone (HOS-090551)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2025-11-12T09:28:00Z · SHA-256 838bc114dc50fcc5141e52ce7cbac64366b6fd4a03bb5a5e7a5ec09cf8be0b00 · Passage bb17575a294e1c6ea67d8805646bff3038e1cfd96e17f699d0cea24ccaeb8458 · Zeichen 875–1767 im Abschnitt
Wechselwirkungen · Evra
EVRA 203 micrograms/24 hours + 33.9 micrograms/24 hours transdermal patch · Abschnitt 4.5 · PDF-Seite 12
HOS-110306 · Präparat HOS-093363
Substances increasing the clearance of CHCs (diminished efficacy of CHCs by enzyme-induction),e.g.:
Barbiturates, bosentan, carbamazepine, phenytoin, primidone, rifampicin, modafinil, and HIV
medications ritonavir, nevirapine and efavirenz; and possibly also felbamate, griseofulvin,
oxcarbazepine, topiramate and products containing the herbal remedy St. John's Wort (hypericum
perforatum).
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): felbamate (HOS-110308) topiramate (HOS-110310) modafinil (HOS-090546) carbamazepine (HOS-085618) griseofulvin (HOS-091156) efavirenz (HOS-087947) nevirapine (HOS-088064) oxcarbazepine (HOS-110224) ritonavir (HOS-084521) bosentan (HOS-086291) phenytoin (HOS-084531) primidone (HOS-090551)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2025-04-22T17:22:00Z · SHA-256 08ee5b4a9562d12725bc2847cb5a881102ab4ddbaaf7c1a2e28b65b78fd2ab5d · Passage fce07ed3919e230e3b4b95a7e6bb5e33dc93093d7123a62b45d6e204078c7c16 · Zeichen 1469–1860 im Abschnitt
Wechselwirkungen · Cialis
CIALIS 2.5 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 6
HOS-111251 · Präparat HOS-093485
Cytochrome P450 inducers
A CYP3A4 inducer, rifampicin, reduced tadalafil AUC by 88 %, relative to the AUC values for
tadalafil alone (10 mg). This reduced exposure can be anticipated to decrease the efficacy of tadalafil;
the magnitude of decreased efficacy is unknown. Other inducers of CYP3A4 such as phenobarbital,
phenytoin and carbamazepine, may also decrease plasma concentrations of tadalafil.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-01-28T14:23:00Z · SHA-256 545fdb0c46550348a52d431b0929b4f86d6314f2661c3c334d55f57753aad337 · Passage f70610d1a079bc8d0f58b67b203cd4c636120190b428a07b196b990ea06625a5 · Zeichen 1540–1940 im Abschnitt
Wechselwirkungen · Cialis
CIALIS 5 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 20
HOS-111299 · Präparat HOS-093485
Cytochrome P450 inducers
A CYP3A4 inducer, rifampicin, reduced tadalafil AUC by 88 %, relative to the AUC values for
tadalafil alone (10 mg). This reduced exposure can be anticipated to decrease the efficacy of tadalafil;
the magnitude of decreased efficacy is unknown. Other inducers of CYP3A4 such as phenobarbital,
phenytoin and carbamazepine, may also decrease plasma concentrations of tadalafil.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-01-28T14:23:00Z · SHA-256 545fdb0c46550348a52d431b0929b4f86d6314f2661c3c334d55f57753aad337 · Passage f70610d1a079bc8d0f58b67b203cd4c636120190b428a07b196b990ea06625a5 · Zeichen 1485–1885 im Abschnitt
Wechselwirkungen · Cialis
CIALIS 10 mg film-coated tablets CIALIS 20 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 35
HOS-111338 · Präparat HOS-093485
Cytochrome P450 inducers
A CYP3A4 inducer, rifampicin, reduced tadalafil AUC by 88 %, relative to the AUC values for
tadalafil alone (10 mg). This reduced exposure can be anticipated to decrease the efficacy of tadalafil;
the magnitude of decreased efficacy is unknown. Other inducers of CYP3A4 such as phenobarbital,
phenytoin and carbamazepine, may also decrease plasma concentrations of tadalafil.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-01-28T14:23:00Z · SHA-256 545fdb0c46550348a52d431b0929b4f86d6314f2661c3c334d55f57753aad337 · Passage f70610d1a079bc8d0f58b67b203cd4c636120190b428a07b196b990ea06625a5 · Zeichen 1541–1941 im Abschnitt
Wechselwirkungen · Ebixa
Ebixa 10 mg film-coated tablets Ebixa 20 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 4
HOS-111449 · Präparat HOS-093529
• The mode of action suggests that the effects of L-dopa, dopaminergic agonists, and
anticholinergics may be enhanced by concomitant treatment with NMDA-antagonists such as
memantine. The effects of barbiturates and neuroleptics may be reduced. Concomitant
administration of memantine with the antispasmodic agents, dantrolene or baclofen, can modify
their effects and a dose adjustment may be necessary.
• Concomitant use of memantine and amantadine should be avoided, owing to the risk of
pharmacotoxic psychosis. Both compounds are chemically related NMDA-antagonists. The
same may be true for ketamine and dextromethorphan (see also section 4.4). There is one
published case report on a possible risk also for the combination of memantine and phenytoin.
• Other active substances such as cimetidine, ranitidine, procainamide, quinidine, quinine and
nicotine that use the same renal cationic transport system as amantadine may also possibly
interact with memantine leading to a potential risk of increased plasma levels.
• There may be a possibility of reduced serum level of hydrochlorothiazide (HCT) when
memantine is co-administered with HCT or any combination with HCT.
• In post-marketing experience, isolated cases with international normalized ratio (INR) increases
have been reported in patients concomitantly treated with warfarin. Although no causal
relationship has been established, close monitoring of prothrombin time or INR is advisable for
patients concomitantly treated with oral anticoagulants.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): baclofen (HOS-089065) ketamine (HOS-109264) cimetidine (HOS-085835) dantrolene (HOS-109261) hydrochlorothiazide (HOS-086937) quinidine (HOS-085593) quinine (HOS-086616) amantadine (HOS-086615) procainamide (HOS-086617) prothrombin (HOS-085093) ranitidine (HOS-085660) dextromethorphan (HOS-109265) nicotine (HOS-109269) phenytoin (HOS-084531) warfarin (HOS-085950)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-07-08T01:00:00Z · SHA-256 fb703506cb848cecf2e6b0e6b12a70b0eed07252984425ca4decbb1c1cda36ff · Passage fc0684d7a39bc8446563d68227b09a2c6ce28efb4a477059ec95e489deb8d3b4 · Zeichen 115–1728 im Abschnitt
Wechselwirkungen · Ebixa
Ebixa 5 mg/pump actuation oral solution. · Abschnitt 4.5 · PDF-Seite 13
HOS-111482 · Präparat HOS-093529
• The mode of action suggests that the effects of L-dopa, dopaminergic agonists, and
anticholinergics may be enhanced by concomitant treatment with NMDA-antagonists such as
memantine. The effects of barbiturates and neuroleptics may be reduced. Concomitant
administration of memantine with the antispasmodic agents, dantrolene or baclofen, can modify
their effects and a dose adjustment may be necessary.
• Concomitant use of memantine and amantadine should be avoided, owing to the risk of
pharmacotoxic psychosis. Both compounds are chemically related NMDA-antagonists. The
same may be true for ketamine and dextromethorphan (see also section 4.4). There is one
published case report on a possible risk also for the combination of memantine and phenytoin.
• Other active substances such as cimetidine, ranitidine, procainamide, quinidine, quinine and
nicotine that use the same renal cationic transport system as amantadine may also possibly
interact with memantine leading to a potential risk of increased plasma levels.
• There may be a possibility of reduced serum level of hydrochlorothiazide (HCT) when
memantine is co-administered with HCT or any combination with HCT.
• In post-marketing experience, isolated cases with international normalized ratio (INR) increases
have been reported in patients concomitantly treated with warfarin. Although no causal
relationship has been established, close monitoring of prothrombin time or INR is advisable for
patients concomitantly treated with oral anticoagulants.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): baclofen (HOS-089065) ketamine (HOS-109264) cimetidine (HOS-085835) dantrolene (HOS-109261) hydrochlorothiazide (HOS-086937) quinidine (HOS-085593) quinine (HOS-086616) amantadine (HOS-086615) procainamide (HOS-086617) prothrombin (HOS-085093) ranitidine (HOS-085660) dextromethorphan (HOS-109265) nicotine (HOS-109269) phenytoin (HOS-084531) warfarin (HOS-085950)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-07-08T01:00:00Z · SHA-256 fb703506cb848cecf2e6b0e6b12a70b0eed07252984425ca4decbb1c1cda36ff · Passage fc0684d7a39bc8446563d68227b09a2c6ce28efb4a477059ec95e489deb8d3b4 · Zeichen 115–1728 im Abschnitt
Wechselwirkungen · Ebixa
Ebixa 5 mg film-coated tablets. Ebixa 10 mg film-coated tablets. Ebixa 15 mg film-coated tablets. Ebixa 20 mg film-coated tablets. · Abschnitt 4.5 · PDF-Seite 24
HOS-111515 · Präparat HOS-093529
• The mode of action suggests that the effects of L-dopa, dopaminergic agonists, and
anticholinergics may be enhanced by concomitant treatment with NMDA-antagonists such as
memantine. The effects of barbiturates and neuroleptics may be reduced. Concomitant
administration of memantine with the antispasmodic agents, dantrolene or baclofen, can modify
their effects and a dose adjustment may be necessary.
• Concomitant use of memantine and amantadine should be avoided, owing to the risk of
pharmacotoxic psychosis. Both compounds are chemically related NMDA-antagonists. The
same may be true for ketamine and dextromethorphan (see also section 4.4). There is one
published case report on a possible risk also for the combination of memantine and phenytoin.
• Other active substances such as cimetidine, ranitidine, procainamide, quinidine, quinine and
nicotine that use the same renal cationic transport system as amantadine may also possibly
interact with memantine leading to a potential risk of increased plasma levels.
• There may be a possibility of reduced serum level of hydrochlorothiazide (HCT) when
memantine is co-administered with HCT or any combination with HCT.
• In post-marketing experience, isolated cases with international normalized ratio (INR) increases
have been reported in patients concomitantly treated with warfarin. Although no causal
relationship has been established, close monitoring of prothrombin time or INR is advisable for
patients concomitantly treated with oral anticoagulants.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): baclofen (HOS-089065) ketamine (HOS-109264) cimetidine (HOS-085835) dantrolene (HOS-109261) hydrochlorothiazide (HOS-086937) quinidine (HOS-085593) quinine (HOS-086616) amantadine (HOS-086615) procainamide (HOS-086617) prothrombin (HOS-085093) ranitidine (HOS-085660) dextromethorphan (HOS-109265) nicotine (HOS-109269) phenytoin (HOS-084531) warfarin (HOS-085950)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-07-08T01:00:00Z · SHA-256 fb703506cb848cecf2e6b0e6b12a70b0eed07252984425ca4decbb1c1cda36ff · Passage fc0684d7a39bc8446563d68227b09a2c6ce28efb4a477059ec95e489deb8d3b4 · Zeichen 115–1728 im Abschnitt
Gegenanzeigen · Reyataz
REYATAZ 200 mg hard capsules REYATAZ 300 mg hard capsules · Abschnitt 4.3 · PDF-Seite 4
HOS-112045 · Präparat HOS-093615
Co-administration with medicinal products that are strong inducers of CYP3A4 due to the potential for
loss of therapeutic effect and development of possible resistance (e.g., rifampicin, St. John's wort,
apalutamide, encorafenib, ivosidenib, carbamazepine, phenobarbital and phenytoin) (see section 4.5).
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) apalutamide (HOS-086212) encorafenib (HOS-086222) ivosidenib (HOS-112046) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-06-29T13:00:00Z · SHA-256 ff5481974bd7c752b73fa0c147cf3e96fc892edc735359fa71817833db471beb · Passage 359af65d22480ed37cfcfaef1bbfcb565d3d5ae0d963e074b6096b3714364fe4 · Zeichen 1124–1428 im Abschnitt
Gegenanzeigen · Reyataz
REYATAZ 50 mg oral powder · Abschnitt 4.3 · PDF-Seite 40
HOS-112153 · Präparat HOS-093615
Co-administration with medicinal products that are strong inducers of CYP3A4 due to the potential for
loss of therapeutic effect and development of possible resistance (e.g., rifampicin, St. John's wort,
apalutamide, encorafenib, ivosidenib, carbamazepine, phenobarbital and phenytoin) (see section 4.5).
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) apalutamide (HOS-086212) encorafenib (HOS-086222) ivosidenib (HOS-112046) phenytoin (HOS-084531)
Vollständigen Kontext in der EMA-Fachinformation lesen →Quellennachweis
Version 2026-06-29T13:00:00Z · SHA-256 ff5481974bd7c752b73fa0c147cf3e96fc892edc735359fa71817833db471beb · Passage 359af65d22480ed37cfcfaef1bbfcb565d3d5ae0d963e074b6096b3714364fe4 · Zeichen 982–1286 im Abschnitt
Wechselwirkungen · Reyataz
REYATAZ 200 mg hard capsules REYATAZ 300 mg hard capsules · Abschnitt 4.5 · PDF-Seite 18
HOS-112099 · Präparat HOS-093615
Close monitoring of the patient's
virologic response should be
exercised.
Phenytoin, phenobarbital Ritonavir may decrease plasma levels of Phenobarbital and phenytoin in
phenytoin and/or phenobarbital due to combination with REYATAZ (with
CYP2C9 and CYP2C19 induction. or without ritonavir), are
contraindicated, due to the risk for
Due to phenytoin/phenobarbital inducing loss of virologic response and
effect, a reduction in REYATAZ exposure development of resistance (see
cannot be ruled out. section 4.3)
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) ritonavir (HOS-084521) phenytoin (HOS-084531)
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Version 2026-06-29T13:00:00Z · SHA-256 ff5481974bd7c752b73fa0c147cf3e96fc892edc735359fa71817833db471beb · Passage b2472d9f7c9d50cc03e93452bf4273ee4eac86e0127c41e8b3352dc6f5d0dac0 · Zeichen 43427–44358 im Abschnitt
Wechselwirkungen · Reyataz
REYATAZ 200 mg hard capsules REYATAZ 300 mg hard capsules · Abschnitt 4.5 · PDF-Seite 24–25
HOS-112119 · Präparat HOS-093615
24
In case of withdrawal of ritonavir from the recommended atazanavir-boosted regimen
(see section 4.4)
The same recommendations for drug interactions would apply except:
that co-administration is not recommended with tenofovir, proton pump inhibitors, and
buprenorphine and contraindicated with carbamazepine, phenytoin and phenobarbital.
that co-administration with famotidine is not recommended but if required, atazanavir without
ritonavir should be administered either 2 hours after famotidine or 12 hours before. No single
dose of famotidine should exceed 20 mg, and the total daily dose of famotidine should not
exceed 40 mg.
the need to consider that:
co-administration of apixaban, dabigatran, or rivaroxaban and REYATAZ without
ritonavir may affect apixaban, dabigatran, or rivaroxaban concentrations
co-administration of voriconazole and REYATAZ without ritonavir may affect atazanavir
concentrations
co-administration of fluticasone and REYATAZ without ritonavir may increase
fluticasone concentrations relative to fluticasone given alone
if an oral contraceptive is administered with REYATAZ without ritonavir, it is
recommended that the oral contraceptive contain no more than 30 μg of ethinyloestradiol
no dose adjustment of lamotrigine is required
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): tenofovir (HOS-088083) lamotrigine (HOS-086242) fluticasone (HOS-108914) phenobarbital (HOS-085617) carbamazepine (HOS-085618) famotidine (HOS-112087) dabigatran (HOS-112096) buprenorphine (HOS-086193) rivaroxaban (HOS-086236) voriconazole (HOS-084524) apixaban (HOS-112091) ritonavir (HOS-084521) phenytoin (HOS-084531)
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Version 2026-06-29T13:00:00Z · SHA-256 ff5481974bd7c752b73fa0c147cf3e96fc892edc735359fa71817833db471beb · Passage e782985711b73a21e78ab499d92e8fece89fe8ca127ddbacf1a99dce682dcc07 · Zeichen 75495–76934 im Abschnitt
Wechselwirkungen · Reyataz
REYATAZ 50 mg oral powder · Abschnitt 4.5 · PDF-Seite 53–54
HOS-112190 · Präparat HOS-093615
53
Medicinal products by Interaction Recommendations
therapeutic area concerning co-administration
Phenytoin, phenobarbital Ritonavir may decrease plasma levels of Phenobarbital and phenytoin in
phenytoin and/or phenobarbital due to combination with REYATAZ
CYP2C9 and CYP2C19 induction. (with or without ritonavir) are
contraindicated due to the risk
Due to phenytoin/phenobarbital inducing for loss of virologic response
effect, a reduction in REYATAZ exposure and development of resistance
cannot be ruled out. (see section 4.3).
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) ritonavir (HOS-084521) phenytoin (HOS-084531)
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Version 2026-06-29T13:00:00Z · SHA-256 ff5481974bd7c752b73fa0c147cf3e96fc892edc735359fa71817833db471beb · Passage 30c17aa6dfc5ecdc30421471876b1569d5f7f3a1d15398750dee3626ae6073de · Zeichen 44854–45750 im Abschnitt
Wechselwirkungen · Stalevo
Stalevo 50 mg/12.5 mg/200 mg film-coated tablets Stalevo 75 mg/18.75 mg/200 mg film-coated tablets Stalevo 100 mg/25 mg/200 mg film-coated tablets Stalevo 125 mg/31.25 mg/200 mg film-coated tablets Stalevo 150 mg/37.5 mg/200 mg film-coated tablets Stalevo 175 mg/43.75 mg/200 mg film-coated tablets Stalevo 200 mg/50 mg/200 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 7
HOS-112319 · Präparat HOS-093651
Other active substances: Dopamine receptor antagonists (e.g. some antipsychotics and antiemetics),
phenytoin and papaverine may reduce the therapeutic effect of levodopa. Patients taking these
medicinal products with Stalevo should be carefully observed for loss of therapeutic response.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): dopamine (HOS-085948) papaverine (HOS-112321) phenytoin (HOS-084531)
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Version 2025-01-06T10:34:00Z · SHA-256 efa438d75f473f63d3f59b043f928d6ef3dd686a6813356b7fc3207963682e9f · Passage 56cdec50ff9b95580c766d771c54222c0df9b59db5db8751906f708b1dd594c2 · Zeichen 1975–2262 im Abschnitt
Wechselwirkungen · Cholestagel
Cholestagel 625 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 4
HOS-112364 · Präparat HOS-093659
There have been very rare reports of reduced phenytoin levels in patients who have received Cholestagel
administered with phenytoin.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenytoin (HOS-084531)
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Version 2025-06-03T11:58:00Z · SHA-256 d40452a2cad7ddd7eafdc4661259cd69e3d231c506afe3b5edc5d67ea216dce5 · Passage 8dfbc3a588f425d136361da2cd2e0d5b73da51e84b6080bc9878327fdba9399a · Zeichen 1439–1571 im Abschnitt
Wechselwirkungen · Emend
EMEND 125 mg hard capsules EMEND 80 mg hard capsules · Abschnitt 4.5 · PDF-Seite 6
HOS-112526 · Präparat HOS-093697
Induction
As a mild inducer of CYP2C9, CYP3A4 and glucuronidation, aprepitant can decrease plasma
concentrations of substrates eliminated by these routes within two weeks following initiation and
treatment. This effect may become apparent only after the end of a 3-day treatment with EMEND. For
CYP2C9 and CYP3A4 substrates, the induction is transient with a maximum effect reached 3-5 days
after end of the EMEND 3-day treatment. The effect is maintained for a few days, thereafter slowly
declines and is clinically insignificant by two weeks after end of EMEND treatment. Mild induction of
glucuronidation is also seen with 80 mg oral aprepitant given for 7 days. Data are lacking regarding
effects on CYP2C8 and CYP2C19. Caution is advised when warfarin, acenocoumarol, tolbutamide,
phenytoin or other active substances that are known to be metabolised by CYP2C9 are administered
during this time period.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): acenocoumarol (HOS-109456) phenytoin (HOS-084531) warfarin (HOS-085950) tolbutamide (HOS-086568)
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Version 2025-10-24T11:24:00Z · SHA-256 afd6062a51e59b36e448c9117685894e4529fcde2f5e673f4401f91bb32d7081 · Passage 06b9369c697bb573f6c8dcd6de97a932ec90843bd807852c1a1204fb206868b6 · Zeichen 6274–7181 im Abschnitt
Wechselwirkungen · Emend
EMEND 125 mg hard capsules EMEND 80 mg hard capsules · Abschnitt 4.5 · PDF-Seite 7
HOS-112536 · Präparat HOS-093697
Concomitant administration of EMEND with active substances that strongly induce CYP3A4 activity
(e.g., rifampicin, phenytoin, carbamazepine, phenobarbital) should be avoided as the combination
results in reductions of the plasma concentrations of aprepitant that may result in decreased efficacy of
EMEND. Concomitant administration of EMEND with herbal preparations containing St. John’s Wort
(Hypericum perforatum) is not recommended.
Originalpassage; keine automatisch abgeleitete Schwere, Häufigkeit oder Kausalität. Auch verneinte Befunde und nicht untersuchte Kombinationen bleiben sichtbar.
RxNorm-Namen im Text (wörtliche Treffer, Rolle nicht bewertet): phenobarbital (HOS-085617) carbamazepine (HOS-085618) phenytoin (HOS-084531)
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Version 2025-10-24T11:24:00Z · SHA-256 afd6062a51e59b36e448c9117685894e4529fcde2f5e673f4401f91bb32d7081 · Passage 8757fed069a0c614375ed79cbcfae166c5a219baf0c1ec55adc1b34e7c8d6541 · Zeichen 9758–10194 im Abschnitt
This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.