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Uses
Donepezil hydrochloride is indicated for the treatment of dementia of the Alzheimer's type. Efficacy has been demonstrated in patients with mild, moderate, and severe Alzheimer's disease.
History
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Other Information
Donepezil hydrochloride is a reversible inhibitor of the enzyme acetylcholinesterase, known chemically as (±)-2, 3-dihydro-5, 6-dimethoxy-2-[[1-(phenylmethyl)-4-piperidinyl]methyl]-1H-inden-1-one hydrochloride. Donepezil hydrochloride is commonly referred to in the pharmacological literature as E2020. It has an empirical formula of C24H29NO3HCl and a molecular weight of 415.96. Donepezil hydrochloride is a white crystalline powder and is freely soluble in chloroform, soluble in water and in glacial acetic acid, slightly soluble in ethanol and in acetonitrile and practically insoluble in ethyl acetate and in n-hexane.
Donepezil Hydrochloride Tablets, USP, are available for oral administration in film-coated tablets containing 5 or 10 mg of donepezil hydrochloride.
Inactive ingredients in 5 mg and 10 mg tablets are lactose monohydrate, hydroxypropyl cellulose, magnesium Stearate, microcrystalline cellulose, corn starch, Croscarmellose sodium. Additionally, the 5 mg tablets coating film contains hydroxypropyl methyl cellulose, titanium dioxide, polyethylene glycol, and FD&C blue. The 10 mg tablets coating film contains hydroxypropyl methyl cellulose, titanium dioxide, polyethylene glycol, iron oxide yellow and iron oxide red.
Sources
Ameriderm Vitamin A D Manufacturers
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Shield Line Llc
Ameriderm Vitamin A D | Solco Healthcare Us, Llc
Donepezil hydrochloride should be taken in the evening, just prior to retiring.
Donepezil hydrochloride can be taken with or without food.
2.1. Mild to Moderate Alzheimer's DiseaseThe dosages of donepezil hydrochloride shown to be effective in controlled clinical trials are 5 mg and 10 mg administered once per day.
The higher dose of 10 mg did not provide a statistically significantly greater clinical benefit than 5 mg. There is a suggestion, however, based upon order of group mean scores and dose trend analyses of data from these clinical trials, that a daily dose of 10 mg of donepezil hydrochloride might provide additional benefit for some patients. Accordingly, whether or not to employ a dose of 10 mg is a matter of prescriber and patient preference.
2.2. Moderate to Severe Alzheimer’s DiseaseDonepezil hydrochloride has been shown to be effective in controlled clinical trials at doses of 10 mg administered once daily.
2.3. TitrationThe recommended starting dose of donepezil hydrochloride is 5 mg once daily. Evidence from the controlled trials in mild to moderate Alzheimer's disease indicates that the 10 mg dose, with a one week titration, is likely to be associated with a higher incidence of cholinergic adverse events compared to the 5 mg dose. In open-label trials using a 6 week titration, the type and frequency of these same adverse events were similar between the 5 mg and 10 mg dose groups. Therefore, because donepezil hydrochloride steady state is achieved about 15 days after it is started and because the incidence of untoward effects may be influenced by the rate of dose escalation, a dose of 10 mg should not be administered until patients have been on a daily dose of 5 mg for 4 to 6 weeks.
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