Donepezil Fluoxetine

IMATINIB 1. ANTIARRHYTHMICS -flecainide, mexiletine, propafenone 2. ANTIDEPRESSANTS - fluoxetine, paroxetine, TCAs, trazodone, venlafaxine 3. ANTIPSYCHOTICS -clozapine, haloperidol, perphenazine, risperidone, thioridazine 4. BETA-BLOCKERS - metoprolol, propanolol, timolol 5. DONEPEZIL 6. METHAMPHETAMINE Imatinib may cause t plasma concentrations of these drugs, with a risk of toxic effects Inhibition of CYP2D6-mediated metabolism of these drugs Watch for early features of toxicity of these drugs... 

A 72-year-old woman with a symptomatic hiatus hernia, osteoarthritis, and Alzheimer s disease was taking fluoxetine 20mg/day, donepezil hydrochloride 10 mg/ day, nimesulide 12.5mg/day, and omeprazole 20 mg/ day (288). There still was no twitch response to peripheral nerve stimulation 20 minutes after rapid-sequence induction of anesthesia with propofol 2.5mg/kg and suxamethonium 1 mg/kg. She then gradually developed a weak twitch response, and 50 minutes after induction of anesthesia four twitches with a fade were elicited by train-of-four stimulation. No additional medication was given and after the end of the procedure 10 minutes later she was extubated uneventfully. She refused further blood testing and so her plasma cholinesterase activity at that time is not known. However, her anesthetic notes from a previous operation did not reveal any problems with prolonged paralysis after suxamethonium. 

GYP 2D6 inhibitors such as fluoxetine, cimeditine can raise level of donepezil. 

Fluvoxamine markedly increases the levels of tacrine, and increases its cholinei ic adverse effects, whereas fluoxetine, paroxetine, and sertraline are not expected to interact. Paroxetine and fluoxetine may increase donepezil and galantamine levels. Sertraline does not appear to have a pharmacokinetic interaction with donepezil, and concurrent use seems generally well tolerated however, one report describes hepatotoxicity, possibly as a result of their concurrent use. Rivastigmine and fluoxetine appear not to interact. 

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