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Aricept (Donepezil)

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Generic Aricept is an effective medication which helps to fight with moderate or mild dementia as a result of Alzheimer's disease. It also improves the ability of patients with Alzheimer's disease to think, to reason, to perceive, to judge, to remember, to recognize. Generic Aricept acts by making the nerve cells in the brain work harder and by detaining the neurotransmitter acetycholine breakdown.

Other names for this medication:

Similar Products:
Galantamine, Rivastigmine


Also known as:  Donepezil.


Generic Aricept is a perfect remedy, which helps to fight with moderate or mild dementia as a result of Alzheimer's disease. It also improves the ability of patients with Alzheimer's disease to think, to reason, to perceive, to judge, to remember, to recognize.

Generic Aricept acts by making the nerve cells in the brain work harder and by detaining the neurotransmitter acetycholine breakdown. It is cholinesterase inhibitor.

Aricept is also known as Donepezil.

Generic name of Generic Aricept is Donepezil.

Brand names of Generic Aricept are Aricept, Aricept ODT.


The tablet should be dissolved on your tongue and then you should drink water.

Do not crush or chew it.

The usual dose is 5 mg-10 mg a day.

Take Generic Aricept tablets orally with or without food, at the same time every day at bedtime.

Take Generic Aricept once a day.

If you want to achieve most effective results do not stop taking Generic Aricept suddenly.


If you overdose Generic Aricept and you don't feel good you should visit your doctor or health care provider immediately. Symptoms of Generic Aricept: slow heartbeat, seizure, vomiting, shallow breathing, weak muscle, drooling, severe nausea, blurred vision, dizziness, sweating.


Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F) away from moisture and heat. Throw away any unused medicine after the expiration date. Keep out of reach of children.

Side effects

The most common side effects associated with Aricept are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Generic Aricept if you are allergic to Generic Aricept components.

Do not take Generic Aricept if you are pregnant, planning to become pregnant. Do not breast-feed while taking Generic Aricept.

Be careful with Generic Aricept if you take hyoscyamine (such as Levsin, Anaspaz, Cystospaz); glycopyrrolate (such as Robinul); rifampin (such as Rifater, Rifadin, Rifamate); a fungal antibiotic (itraconazole (such as Sporanox), ketoconazole (such as Nizoral), fluconazole (such as Diflucan)); atropine (such as Donnatal); propantheline (such as Pro-Banthine); aspirin or other NSAIDs (mefenamic acid (such as Ponstel), piroxicam (such as Feldene), indomethacin (such as Indocin), ibuprofen (such as Advil, Motrin), naproxen (such as Naprosyn, Aleve), diclofenac (such as Voltaren), etodolac (such as Lodine), flurbiprofen (such as Ansaid), ketoprofen (such as Orudis), ketorolac (such as Toradol), meloxicam (such as Mobic)); mepenzolate (such as Cantil); belladonna; scopolamine (such as Transderm-Scop), methscopolamine (such as Pamine); quinidine (such as Quinaglute, Cardioquin, Quinidex); carbamazepine (such as Tegretol); phenobarbital (such as Solfoton, Luminal); clidinium (such as Quarzan); dicyclomine (such as Bentyl); phenytoin (such as Dilantin); dexamethasone (such as Decadron), methantheline (such as Provocholine); nabumetone (such as Relafen), diflunisal (such as Dolobid).

Be very careful with Generic Aricept if you suffer from or have a history of enlarged prostate, heart rhythm or seizure disorder, epilepsy, problems with urination, asthma, obstructive pulmonary disease.

Be careful with this drug if you are going to have a surgery.

Avoid driving machinery.

It can be dangerous to stop Generic Aricept taking suddenly.

aricept 5mg cost

A series of halogen-directed donepezil drugs has been designed to inhibit acetyl cholinesterase (AChE). Density Functional theory (DFT) has been employed to optimize the chair as well as boat conformers of the parent drug and modified ligands at B3LYP/MidiX and B3LYP/6-311G + (d,p) level of theories. Charge distribution, dipole moment, enthalpy, free energy and molecular orbitals of these ligands are also investigated to understand how the halogen-directed modifications impact the ligand structure and govern the non-bonding interactions with the receptors. Molecular docking calculation has been performed to understand the similarities and differences between the binding modes of unmodified and halogenated chair-formed ligands. Molecular docking indicated donepezil and modified ligands had non-covalent interactions with hydrophobic gorges and anionic subsites of AChE. The -CF3-directed ligand possessed the most negative binding affinity. Non-covalent interactions within the ligand-receptor systems were found to be mostly hydrophobic and π- stacking type. F, Cl and -CF3 containing ligands emerge as effective and selective AChE inhibitors, which can strongly interact with the two active sites of AChE. In addition, we have also investigated selected pharmacokinetic parameters of the parent and modified ligands.

aricept medication

The study was completed by 66.9% of the donepezil- and 67.4% of the placebo-treated patients. The benefit of donepezil over placebo was demonstrated by the Gottfries-Bråne-Steen (a global assessment for rating dementia symptoms) total score at weeks 24, 36, and 52 (p < 0.05) and at the study end point (week 52, last observation carried forward; p = 0.054). Advantages of donepezil over placebo were also observed in cognition and activities of daily living (ADL) assessed by the Mini-Mental State Examination at weeks 24, 36, and 52, and the end point (p < 0.02) and by the Progressive Deterioration Scale at week 52 and the end point (p < 0.05). Adverse events (AE) were recorded for 81.7% of donepezil- and 75.7% of placebo-treated patients, with 7% of donepezil- and 6.3% of placebo-treated patients discontinuing because of AE. Treatment response to donepezil was not predicted by APOE genotype or sex in this population.

aricept drug dosage

Male Wistar rats were pre-treated with donepezil (0.1 to 10 mg/kg) for about 1 h before microPET scans using (11)C-SA4503. The total distribution volume (V T) of the tracer was determined by Logan graphical analysis using time activity curves from arterial plasma and regions of interest drawn around the entire brain and individual brain regions. RO by donepezil was calculated from a modified Lassen plot, and ED50 was estimated from the sigmoidal dose-response curves obtained when the RO was plotted against log donepezil dose.

aricept 40 mg

Donepezil, a well-tolerated cholinesterase inhibitor used in the treatment of Alzheimer dementia, reduces hypersensitivity in this rat model of neuropathic pain by actions on muscarinic receptors in the spinal cord. Lack of tolerance to this effect, in contrast to rapid tolerance to direct receptor agonists, suggests that cholinesterase inhibition may be useful in the treatment of neuropathic pain.

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A total of 769 patients with MCI, 107 cognitively normal elderly controls, 122 patients with very mild AD (Clinical Dementia Rating [CDR] 0.5), and 183 patients with mild AD (CDR 1.0) were evaluated. Patients in the MIS met operational criteria for amnestic MCI. Controls were recruited in parallel with the MCI group, underwent the same assessments, and had a CDR of 0.

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There is insufficient evidence to recommend the use of drug therapy in the treatment of OSA. Small studies have reported positive effects of certain agents on short-term outcomes. Certain agents have been shown to reduce the AHI in largely unselected populations with OSA by between 24% and 45%. For donepezil and fluticasone, studies of longer duration with a larger population and better matching of groups are required to establish whether the change in AHI and impact on daytime symptoms are reproducible. Individual patients had more complete responses to particular drugs. It is possible that better matching of drugs to patients according to the dominant mechanism of their OSA will lead to better results and this also needs further study.

aricept 2 mg

Cell-based assays were conducted using osteoclasts generated in cultures of murine bone marrow macrophages (BMMs) with receptor activator of nuclear factor-kappa B ligand (RANKL). The effect of donepezil was also determined in vivo using a mouse model of RANKL-induced bone loss.

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Sixty individuals (30 men and 30 women; mean +/- SD age, 75.0+/-9.5 years) with probable Alzheimer disease and scores of 20 or less on the information-memory-concentration subscale of the Blessed Dementia Scale.

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Twenty-three patients with mild-to-moderate probable AD according to the National Institute of Neurological and Communicative Disorders and Stroke and Alzheimer's Disease and Related Disorders Association criteria were included. Each participant had exhibited an insufficient response to treatment with donepezil alone before the start of the trial. Eleven patients received treatment with donepezil alone, and the remaining patients received a combined treatment of donepezil and NYT for 2 years. Patients were assessed by the Mini-Mental State Examination and the Alzheimer's Disease Assessment Scale-cognitive component-Japanese version for cognitive function, and the Neuropsychiatric Inventory was used to evaluate the patients' mood status at baseline and every 6 months for 2 years.

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Memory disorder is one of the most frequent cognitive impairment and has a great negative impact on the quality of life in patients with multiple sclerosis (MS). A few pharmacologic agents appear to be effective to memory disorder in patients with MS in some existing randomised controlled trials.

aricept dose titration

Randomized controlled trials (RCTs) provide safety and efficacy data for regulatory approval of antidementia drugs, but offer limited data regarding real-world effectiveness. Long-term observational controlled studies (LTOCs) extend our understanding by providing longitudinal data across multiple stages of Alzheimer's disease (AD).

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Improvements favoring donepezil on the Alzheimer Disease Assessment Scale-cognitive subscale were found at weeks 12 and 24 and at the end point (last observation carried forward); treatment differences were 1.9 (P = .03), 2.3 (P = .008), and 2.3 (P = .001) points, respectively. Improvements favoring donepezil on the Mini-Mental State Examination were found at weeks 6, 12, and 24 and at the end point (last observation carried forward); treatment differences were 1.4 (P = .02), 1.2 (P = .04), 1.4 (P = .03), and 1.8 (P = .002) points, respectively. Donepezil-treated patients showed greater mean improvement compared with placebo-treated patients on the following Computerized Memory Battery Test subscales: facial recognition (P = .007 in the intent-to-treat population and P = .04 in the fully evaluable population), first and last name total acquisition (P = .02), and name-face association delayed recall (P = .04). Donepezil was safe and well tolerated in this population; serious adverse events occurred in similar numbers of donepezil- and placebo-treated patients.

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Enhancement of histaminergic neurotransmission or histaminergic plus cholinergic neurotransmission may represent novel strategies for improving cognition in Alzheimer's disease.

aricept medicine

To determine whether BChE-K genotype predicts response to donepezil in MCI.

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Memory disorders units at Massachusetts General and Brigham and Women's hospitals, Boston.

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The Severe Impairment Battery (SIB), a reliable cognitive measure for evaluating treatment response in advanced Alzheimer's disease (AD), takes approximately 20 min to administer. A recently derived 8-item version of the SIB - the SIB-8 - which takes about 3 min to administer, may represent a more convenient tool for use in clinical practice. The current analyses further explored the SIB-8 scale with respect to its validity and sensitivity.

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We evaluated rCBF changes in the PCC, precuneus and anterior cingulate cortex using perfusion single-photon emission computed tomography (SPECT), statistical analysis and region of interest analysis, prospectively. We allocated 36 patients with mild AD to either the responder or non-responder groups based on changes in Mini-Mental State Examination scores. The patients were followed up for 18 months.

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There is supportive evidence that memantine may help prevent cognitive deficits for adults with brain metastases receiving cranial irradiation. There is supportive evidence that donepezil may have a role in treating cognitive deficits in adults with primary or metastatic brain tumours who have been treated with cranial irradiation. Patient withdrawal affected the statistical power of both studies. Further research that tries to minimise the withdrawal of consent, and subsequently reduce the requirement for imputation procedures, may offer a higher quality of evidence.There is no strong evidence to support any non-pharmacological interventions (medical or cognitive/behavioural) in the prevention or amelioration of cognitive deficits. Non-randomised studies appear promising but are as yet to be conclusive via translation into high quality evidence. Further research is required.

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This review updates the original review, 'Pharmacological treatments for fatigue associated with palliative care' and also incorporates the review 'Drug therapy for the management of cancer-related fatigue'.In healthy individuals, fatigue is a protective response to physical or mental stress, often relieved by rest. By contrast, in palliative care patients' fatigue can be severely debilitating and is often not counteracted with rest, thereby impacting daily activity and quality of life. Fatigue frequently occurs in patients with advanced disease (e.g. cancer-related fatigue) and modalities used to treat cancer can often contribute. Further complicating issues are the multidimensionality, subjective nature and lack of a consensus definition of fatigue. The pathophysiology is not fully understood and evidence-based treatment approaches are needed.

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aricept gel 2016-12-23

AD patients were divided by the presence/absence of symptoms suggestive of concomitant Lewy body disease. These were identified by a concomitant diagnosis of dementia with Lewy bodies and/or use of anti-parkinsonian medication at baseline. Baseline characteristics, demographics, changes on efficacy parameters and adverse event (AE) frequencies buy aricept online were calculated for rivastigmine- and donepezil-treated patients. Efficacy parameters were the Severe Impairment Battery (SIB), Mini-Mental State Examination (MMSE), Global Deterioration Scale (GDS), Neuropsychiatric Inventory (NPI) and AD Cooperative Study Activities of Daily Living scale (ADCS-ADL). Main efficacy analyses were based on an intent-to-treat last observation carried forward (ITT-LOCF) population.

aricept generic price 2017-03-04

Donepezil is effective in slowing the progression of Alzheimer's disease (AD). No data are available on the patterns of donepezil use among nursing home buy aricept online residents. We estimate the prevalence of the use of donepezil and the frequency of its initiation, and describe the demographic and clinical characteristics of residents taking this drug.

aricept 4 mg 2017-04-21

The effects of T-82 (2-[2-(1-benzylpiperidin-4-yl)ethyl]-2,3-dihydro-9-methoxy-1H-pyrrolo [3,4-b]quinolin-1-one hemifumarate), a new quinoline derivative, on acetylcholinesterase (AChE) activity and acetylcholine (ACh) release were compared with those of the well-known cholinesterase inhibitors tacrine and E2020. T-82, tacrine and E2020 all concentration-dependently inhibited AChE in rat brain homogenate (IC50 = 109.4, 84.2 and 11.8 nM, respectively). In addition, although tacrine strongly inhibited butyrylcholinesterase (BuChE), T-82 and E2020 showed only weak activity on BuChE in human plasma. In ex vivo experiments, intraperitoneal administration of T-82 at a dose of 30 mg/kg inhibited AChE activity in the hippocampus, frontal cortex and parietal cortex of rats. The effect of T-82 on the extracellular ACh concentration in rat brain was measured using in vivo microdialysis. T-82 at doses of 10 and 30 mg/kg, i.p. increased the extracellular ACh concentration in the hippocampus and striatum in a dose-dependent manner. These findings suggest that T-82 activates the central cholinergic system by selectively inhibiting AChE activity, while buy aricept online weakly affecting peripheral BuChE activity, and that T-82 increases the extracellular ACh concentration in the brain, which is followed by inhibited AChE activity.

aricept 5mg generic 2017-10-22

Following a 48-week, double-blind, randomized, placebo-controlled trial of donepezil in 821 patients with amnestic mild cognitive impairment (aMCI), safety and tolerability of donepezil (10 mg) were further evaluated in a 28-week extension study. Of 499 participants who completed the double-blind phase, 145 enrolled in the open-label study. Adverse events (AEs) were recorded throughout. Overall, 57.4% of participants in the donepezil/donepezil group and 62.3% in the placebo/donepezil group experienced an AE, with the most frequent treatment-emergent AEs being diarrhea, muscle spasms, insomnia, and nausea. Most were mild to moderate in severity and were more common in the first several weeks after treatment initiation. More participants in the placebo/donepezil group (22.1%) discontinued donepezil due to an AE compared with buy aricept online the donepezil/donepezil group (10.3%). These findings support the safety of donepezil in patients with aMCI. When compared with other studies, however, the data suggest that patients with Alzheimer's tolerate donepezil better than patients with MCI.

aricept alcohol dementia 2017-06-25

There is considerable evidence that pro-cholinergic agents can cause depressed mood. However, there are also published case reports buy aricept online of a rare association between cholinesterase inhibitors and mood elevation in patients with pre-existing major functional psychiatric disorders, or organic disorders other than dementia. This report adds to the literature by describing a case of mood elevation in a patient without pre-existing psychiatric disorder.

aricept generic canada 2016-01-15

The specific attributable benefits of BPST cannot be determined from an open trial. However, the BPST therapy was feasible and was successfully delivered according to an operationalized manual. The encouraging outcome indicates the need buy aricept online for a randomized controlled trial of BPST.

aricept pill 2015-04-07

A bioanalytical method was developed and validated to estimate donepezil, 6-desmethyl donepezil and 5-desmethyl donepezil simultaneously in human plasma using galantamine as an internal standard (IS). The chromatographic separation was achieved on a reverse-phase XTerra RP (150 × 4.6 mm, 5 µm) column without affecting recovery (mean recovery > 60% with CV < 10%) for all analytes. ESI-MS/MS multiple reaction monitoring in positive polarity was used to detect mass pairs for donepezil (m/z 380.3 → 91.3), 6-desmethyl donepezil (m/z 366.4 → 91.3), 5-desmethyl donepezil (m/z 366.4 → 91.3) and galantamine m/z (288.1 → 213.0). The linearity was established over a dynamic range of 0.339-51.870, 0.100-15.380 and 0.103-15.763 ng/mL for donepezil, 6-desmethyl donepezil and 5-desmethyl donepezil, respectively. The current method shows that minimal conversion of labile metabolites to parent donepezil in plasma as stability was successfully achieved for 211 days at -15 °C storage temperature. The method was successfully applied to a clinical study after administration of 10 mg buy aricept online donepezil tablets to healthy male Indian volunteers.

aricept 20 mg 2017-05-05

To investigate the cognitive effects of the N-methyl-D-aspartate receptor antagonist, memantine, with a post-hoc exploratory reanalysis of a 24-week randomized, double-blind, placebo-controlled, parallel group clinical trial comparing memantine (20 mg per day) to placebo in patients with moderate to severe Alzheimer disease (AD buy aricept online ) receiving treatment with the cholinesterase inhibitor, donepezil.

aricept drug 2016-11-30

Behavioural and psychological symptoms of dementia (BPSD) are non-cognitive symptoms commonly associated buy aricept online to Alzheimer's disease (AD). The characterization of the clinical profile of AD patients might help to better understand disease evolution and to improve diagnosis and treatment. Thus, the aim of the present study is to describe the clinical profile of AD patients, and to correlate the presence of BPSD with the severity of the disease.

aricept cost 2015-03-28

The subjects consisted of 60 patients with DLB and 210 patients with AD. The degree of entorhinal cortex atrophy was quantified by application of the VSRAD to MRI data, and a Z score >2 was defined buy aricept online as significant atrophy.

aricept 5mg tablet 2017-11-05

Outpatient research clinics in New York City, U.S., Manchester buy aricept online , U.K. and Sydney, Australia.

aricept drug classification 2015-02-04

Adherence to cholinesterase inhibitor (ChEI) is associated with treatment effectiveness in the treatment of Alzheimer's buy aricept online disease (AD). We investigated the clinical adherence to donepezil in Taiwan.

aricept dose titration 2017-07-16

The methodological quality of included trials was poor with less samples. Results of different trials were lack of consistency. Present evidence is not sufficient to prove or disapprove the role of Chinese herbal medicine in improving clinical symptoms and outcome indicators of VaD patients. Their clinical efficacy and Desyrel Trazodone Overdose safety need to be supported by more higher quality RCTs.

aricept brand name 2016-07-03

Our longitudinal descriptive pilot study aimed at observing consequences of the sudden discontinuation of anti-dementia drugs in a population with a moderate to severe stage of Alzheimer's disease. The study took place in a French residency for dependent elderly people, treated with at least one of the following treatments: rivastigmine, donepezil, Geodon 5mg Capsules galantamine and/or memantine. Based on multidisciplinary decision, as recommended, patient's anti-dementia treatment have been stopped or not. Criteria have been collected for 6months and compared between the two groups: safety, motivation for discontinuation, score mini-mental state examination (MMSE), psycho-behavior criteria and finally the concomitant prescription of psychotropic drugs.

aricept drug class 2015-11-12

Delays in the diagnosis of Alzheimer's disease, and, therefore, delays in treatment, may have a detrimental effect on a patient's long-term well-being. This study assessed the effects of postponing donepezil treatment for 1 year by comparing patients treated continuously for 3 years with those who received placebo for 1 year followed by open-label donepezil for 2 years. Patients (n = 286) with possible or probable Alzheimer's disease (according to DSM-IV, NINCDS-ADRDA, and Mini-Mental State Examination criteria; see text) were randomized to receive donepezil (5 mg/day for 4 weeks, 10 mg/day thereafter) or placebo (delayed-start group) for 1 year. Of the 192 completers, 157 began a 2-year, open-label phase Famvir Cost Ireland of donepezil treatment. Outcome measures were the Gottfries-Bråne-Steen scale, the Mini-Mental State Examination, the Global Deterioration Scale, the Progressive Deterioration Scale, the Neuropsychiatric Inventory, and safety (adverse events). Mixed regression analysis was used to compare changes between the groups over 3 years on the efficacy measures. There was a trend for patients receiving continuous therapy to have less global deterioration (Gottfries-Bråne-Steen scale) than those who had delayed treatment (p = 0.056). Small but statistically significant differences between the groups were observed for the secondary measures of cognitive function (Mini-Mental State Examination; p = 0.004) and cognitive and functional abilities (Global Deterioration Scale; p = 0.0231) in favor of continuous donepezil therapy. Over 90% of the patients in both cohorts experienced one treatment-emergent adverse event; most were considered mild or moderate. In conclusion, patients in whom the start of treatment is delayed may demonstrate slightly reduced benefits as compared with those seen in patients starting donepezil therapy early in the course of Alzheimer's disease. These data support the long-term efficacy and safety of donepezil.

aricept medication class 2016-07-25

This brief overview will describe some of the current anti-Alzheimer's disease (AD) agents. The relevance of the cholinergic deficit in AD is well-established. Cholinesterase inhibitor (CEI) drugs represent the only FDA-approved primary treatment options for AD as of April 1998. Modest efficacy for AD now has been shown in well-designed clinical trials for six separate CEI agents. Only two, tacrine and donepezil, are currently on the market in the United States, but several others, including rivastigmine (ENA-713), metrifonate, and physostigmine-CR could be available by the end of 1998. Three other treatment strategies are being pursued. Estrogen replacement Khasiat Feldene Gel therapy as a treatment for AD in postmenopausal women is under active investigation. Analogously, clinical studies provide evidence that individuals using anti-inflammatory agents have a lower probability of developing AD. The success of alpha-tocopherol and selegiline in a recently conducted 2-year, double-blinded, placebo-controlled trial supports the hypothesis that oxidative stress plays a role in AD.

aricept drug doses 2016-05-07

The efficacy of acetylcholinesterase inhibitors remains controversial due to uncertainty over what change is considered clinically significant. Any Cymbalta Reviews Webmd derived benefit seems to be independent of dementia severity and donepezil is the most cost-effective for Alzheimer's dementia. Memantine potentially influences the underlying pathological processes in Alzheimer's disease and may be more effective in moderate to severe Alzheimer's dementia. The role of combination therapy remains uncertain. Future therapies are aimed at modulating the disease process by using chemical agents to inhibit amyloid and tau deposition. None have been approved clinically.

aricept dosage reduction 2017-03-02

The present study was undertaken to Symmetrel Cost clarify the role of nicotinic receptors in the ameliorative effects of cholinesterase inhibitors on scopolamine-induced memory deficit.

aricept medication 2015-08-26

Acoustic startle responses were measured in a startle chamber. Microdialysis was performed, and the levels of dopamine and ACh in Lexapro Type Drugs the prefrontal cortex were measured.

aricept dosage forms 2015-04-10

N-[C] methylpiperidin-4-yl acetate ([C]MP4A) positron emission tomography was performed in 16 patients with probable Alzheimer disease (AD) before and during the treatment of donepezil (5 mg/day) with a mean interval of 5.3 months. The plasma IC50 value of donepezil was estimated from plasma donepezil concentrations and cerebral cortical mean AChE inhibition rates measured by Claritin Dosage Weight positron emission tomography, using one-parameter model.

aricept safe dosage 2015-04-06

Six open-label and 24 double-blind studies were found. In five open-label studies there was an improvement in memory, attention and executive functions. Thirteen double-blind studies (four with rivastigmine, six with donepezil and three with galantamine) contributed to the meta-analysis. Significant improvement was found in this analysis for memory and the Trail Making test part A.

aricept 10mg generic 2017-08-16

Performance on the Cambridge Neuropsychological Test Automated Battery touchscreen paired-associates learning (PAL) test is predictive of Alzheimer's disease and impaired in schizophrenia and chronic drug users. An automated computer touchscreen PAL task for rats has been previously established. A pharmacologically validated PAL task for mice would be a highly valuable tool, which could be useful for a number of experimental aims including drug discovery.

aricept generic picture 2016-10-28

Accumulating evidence suggests that sigma-1 receptors play a role in the pathophysiology of neuropsychiatric diseases, as well as in the mechanisms of some selective serotonin reuptake inhibitors (SSRIs). Among the SSRIs, the order of affinity for sigma-1 receptors is as follows: fluvoxamine > sertraline > fluoxetine > escitalopram > citalopram > paroxetine. Some SSRIs (e.g., fluvoxamine, fluoxetine and escitalopram) and other drugs (donepezil , ifenprodil , dehydroepiandeterone (DHEA)) potentiate nerve-growth factor (NGF)-induced neurite outgrowth in PC12 cells, and these effects could be antagonized by the selective sigma-1 receptor antagonist NE-100. Furthermore, fluvoxamine, donepezil, and DHEA, but not paroxetine or sertraline, improved phencyclidine-induced cognitive deficits in mice, and these effects could be antagonized by NE-100. Several clinical studies showed that sigma-1 receptor agonists such as fluvoxamine and ifenprodil could have beneficial effects in patients with neuropsychiatric disorders. In this chapter, the authors will discuss the role of sigma-1 receptors in the mechanistic action of some SSRIs, donepezil, neurosteroids, and ifenprodil, and the clinical implications for sigma-1 receptor agonists .

aricept 2 mg 2017-07-25

Donepezil 10 mg/day has been a modestly successful therapeutic agent for the palliative treatment of Alzheimer disease dementia. In 2011, seeking greater efficacy and an extension of the Aricept brand, a 23-mg formulation of donepezil was introduced. A large-scale trial, organized by Eisai, the sponsor, failed to show superiority in their primary analyses of donepezil 23 mg/day in patients with moderate to severe Alzheimer disease dementia vs 10 mg, but the published report used post hoc analyses to claim "statistically significant benefits." There was greater than a 3 times higher rate of gastrointestinal side effects with 23 mg of donepezil compared to 10 mg. Thus, not only does donepezil 23 mg/day increase the likelihood of unacceptable gastrointestinal side effects, it provides no clinical benefits. Aricept 23 mg is about 10 times more costly per pill than donepezil 10 mg.