Wirkstoffe & Arzneimittelsicherheit

Wechselwirkungen · Memantine Merz

Memantine Merz 10 mg film-coated tablets · Abschnitt 4.5 · PDF-Seite 4

HOS-219940 · Präparat HOS-216483

• 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)