Donepezil Hydrochloride 5 mg Tablet, Film Coated, 4,000-count
🆔 Identity & classification
Where does this data come from?
🏷️ RxNorm drug class
This medicine belongs to the Cholinesterase Inhibitor class.
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🏭 Manufacturer & labeler
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🩺 Clinical
- Unfortunately, no — donepezil doesn't cure Alzheimer's disease, and it won't stop the disease from progressing over time. What it can do is help manage symptoms like memory and thi...
- Will donepezil cure my family member's Alzheimer's disease?
- You should take donepezil once a day in the evening, just before going to bed. Food doesn't affect how well it's absorbed, so you can take it with or without a meal — whatever work...
- When should I take donepezil, and does it matter if I take it with food?
Patient education
Supplement & herbal interactions
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💊 What it looks like
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
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IACT rows and label-wide narrative are kept separate; availability and product-level specificity depend on the submitted label.Inactive ingredient FAQ
Are inactive ingredients the same for every manufacturer?
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.048 | $190.40 / 4000 tablets |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · Q2 2026 | $0.1339 | $535.60 / 4000 tablets |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Donepezil hydrochloride 5 mg 55111-0356-05 | Dr. | 500 tablets | $0.044 | AB | Discontinued | save 8% |
| Donepezil Hydrochloride 5 mg 00904-6477-61 | Major | 1 tablet | $0.044 | AB | Availability likely | save 8% |
| Donepezil Hydrochloride 5 mg 16571-0778-03 | Rising | 30 tablets | $0.044 | AB | Availability likely | save 8% |
| Donepezil Hydrochloride 5 mg 33342-0027-07 | Macleods | 30 tablets | $0.044 | AB | Availability likely | save 8% |
| donepezil hydrochloride 5 mg 43547-0275-03 | Solco | 30 tablets | $0.044 | AB | Availability likely | save 8% |
| Donepezil 5 mg 60687-0292-01 | American | 100 tablets | $0.044 | AB | Availability likely | save 8% |
| Donepezil Hydrochloride 5 mg 71093-0127-01 | ACI | 30 tablets | $0.044 | — | Discontinued | save 8% |
| Donepezil 5 mg 82009-0119-05 | Quallent | 500 tablets | $0.044 | AB | Availability likely | save 8% |
| Donepezil Hydrochloride 5 mgthis 13668-0102-40 | Torrent | 4000 tablets | $0.048 | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 00615-7951-05 | NCS | 15 tablets | — | AB | FDA listed | — |
| donepezil hydrochloride 5 mg 29300-0248-01 | Unichem | 100 tablets | — | — | FDA listed | — |
| Donepezil 5 mg 31722-0737-01 | Camber | 100 tablets | — | AB | FDA listed | — |
| donepezil hydrochloride 5 mg 43547-0878-03 | Solco | 30 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 46708-0295-10 | Alembic | 100 tablets | — | AB | FDA listed | — |
| donepezil hydrochloride 5 mg 50090-3537-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 50090-6329-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 50090-7365-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 50228-0139-10 | ScieGen | 1000 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 55154-7883-00 | Cardinal | 1 tablet | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 60429-0321-10 | Golden | 1000 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 62332-0092-10 | Alembic | 100 tablets | — | AB | FDA listed | — |
| Aricept 5 mg 62856-0245-30 | Eisai | 30 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 63629-9326-01 | Bryant | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 65862-0325-01 | Aurobindo | 100 tablets | — | — | FDA listed | — |
| Donepezil Hydrochloride 5 mg 67046-1476-03 | Coupler | 30 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 68788-8208-03 | Preferred | 30 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 68788-8711-03 | Preferred | 30 tablets | — | — | FDA listed | — |
| Donepezil 5 mg 70518-4380-00 | REMEDYREPACK | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 70518-4392-00 | REMEDYREPACK | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 71209-0019-01 | Cadila | 30 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 71335-2022-01 | Bryant | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 71335-2065-01 | Bryant | 90 tablets | — | — | Discontinued | — |
| Donepezil Hydrochloride 5 mg 71335-2093-01 | Bryant | 90 tablets | — | AB | FDA listed | — |
| Donepezil Hydrochloride 5 mg 72162-2136-00 | Bryant | 1000 tablets | — | — | Discontinued | — |
| Donepezil Hydrochloride 5 mg 72189-0031-90 | Direct_Rx | 90 tablets | — | AB | Discontinued | — |
| donepezil hydrochloride 5 mg 87063-0305-01 | ASCLEMED | 100 tablets | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
💊 Medicaid utilization by pack size
🔬 Reported adverse events (FAERS)
Top reported reactions
Age at onset
Reporter sex
Serious outcomes
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📦 Packaging — all sizes for this product
| Package NDC | Description | Per unit | Per pack | Marketing start | Status |
|---|---|---|---|---|---|
| 13668-0102-05 | 500 TABLET, FILM COATED in 1 BOTTLE (13668-102-05) | — | — | 2011-05-31 | Active |
| 13668-0102-10 | 1000 TABLET, FILM COATED in 1 BOTTLE (13668-102-10) | $0.0440 / ea | $43.95 | 2011-05-31 | Active |
| 13668-0102-30 | 30 TABLET, FILM COATED in 1 BOTTLE (13668-102-30) | $0.0440 / ea | $1.32 | 2011-05-31 | Active |
| 13668-0102-40 You're viewing this | 4000 TABLET, FILM COATED in 1 BOTTLE (13668-102-40) | $0.0476 / ea | $190.48 | 2011-05-31 | Active |
| 13668-0102-90 | 90 TABLET, FILM COATED in 1 BOTTLE (13668-102-90) | $0.0440 / ea | $3.96 | 2011-05-31 | Active |
You're viewing the largest of 5 pack sizes for this product.
Per ea, this pack runs about 8% above the cheapest pack (1000-count, $0.0440 vs $0.0476 NADAC).
This pack shows little to no recent Medicaid volume — the 90 tablets pack carries most fills. See all packs ↓
Pack size FAQ
What quantity is in NDC 13668-0102-40?
What is the difference between NDC 13668-0102-40 and NDC 13668-0102-30?
What NDC number is used to bill for this package of Donepezil Hydrochloride 5 mg Tablet, Film Coated?
Prices are the latest CMS NADAC pharmacy acquisition cost per NDC; per-pack figures are per-unit × pack quantity, shown only when the pack is denominated in the same measure NADAC prices.
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
1 INDICATIONS AND USAGE Donepezil hydrochloride tablets are an acetylcholinesterase inhibitor 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 Donepezil hydrochloride tablets are 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.
⏱️ Dosage and Administration ▾
2 DOSAGE AND ADMINISTRATION Mild to Moderate Alzheimer's Disease: 5 mg to 10 mg once daily ( 2.1 ) Moderate to Severe Alzheimer's Disease: 10 mg once daily ( 2.2 )
2.1Dosing in Mild to Moderate Alzheimer’s Disease The recommended starting dosage of donepezil hydrochloride tablets is 5 mg administered once per day in the evening, just prior to retiring. The maximum recommended dosage of donepezil hydrochloride tablets in patients with mild to moderate Alzheimer's disease is 10 mg per day. 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.
2.2Dosing in Moderate to Severe Alzheimer’s Disease The recommended starting dosage of donepezil hydrochloride tablets is 5 mg administered once per day in the evening, just prior to retiring. 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.
2.3Administration Information Donepezil hydrochloride tablets should be taken in the evening, just prior to retiring. Donepezil hydrochloride tablets can be taken with or without food.
💊 Dosage Forms and Strengths ▾
3 DOSAGE FORMS AND STRENGTHS Tablets: 5 mg and 10 mg (3) Donepezil hydrochloride tablets, USP are supplied as film-coated, round tablets containing 5 mg or 10 mg of donepezil hydrochloride. The 5 mg tablets are white to off white, circular, biconvex, film coated tablets debossed with '5' on one side and plain on other side. The 10 mg tablets are peach colored, circular, biconvex, film coated tablets debossed with '10' on one side and plain on other side.
⛔ Contraindications ▾
4 CONTRAINDICATIONS Known hypersensitivity to donepezil hydrochloride or to piperidine derivatives ( 4 ) Donepezil hydrochloride tablets are contraindicated in patients with known hypersensitivity to donepezil hydrochloride or to piperidine derivatives.
⚠️ Warnings and Cautions ▾
5 WARNINGS AND PRECAUTIONS Cholinesterase inhibitors are likely to exaggerate succinylcholine-type muscle relaxation during anesthesia ( 5.1 ) Cholinesterase inhibitors may have vagotonic effects on the sinoatrial and atrioventricular nodes manifesting as bradycardia or heart block ( 5.2 ) Donepezil hydrochloride tablets can cause vomiting. Patients should be observed closely at initiation of treatment and after dose increases ( 5.3 ) Patients should be monitored closely for symptoms of active or occult gastrointestinal (GI) bleeding, especially those at increased risk for developing ulcers ( 5.4 ) Cholinomimetics may cause bladder outflow obstructions ( 5.6 ) Cholinomimetics are believed to have some potential to cause generalized convulsions ( 5.7 ) Cholinesterase inhibitors should be prescribed with care to patients with a history of asthma or obstructive pulmonary disease ( 5.8 )
5.1Anesthesia Donepezil hydrochloride, as a cholinesterase inhibitor, is likely to exaggerate succinylcholine-type muscle relaxation during anesthesia.
5.2Cardiovascular Conditions Because of their pharmacological action, cholinesterase inhibitors may have vagotonic effects on the sinoatrial and atrioventricular nodes. This effect may manifest as bradycardia or heart block in patients both with and without known underlying cardiac conduction abnormalities. Syncopal episodes have been reported in association with the use of donepezil hydrochloride tablets.
5.3Nausea and Vomiting Donepezil hydrochloride tablets, as a predictable consequence of their pharmacological properties, have been shown to produce diarrhea, nausea, and vomiting. These effects, when they occur, appear more frequently with the 10 mg/day dose than with the 5 mg/day dose. Although in most cases, these effects have been transient, sometimes lasting one to three weeks, and have resolved during continued use of donepezil hydrochloride tablets, patients should be observed closely at the initiation of treatment and after dose increases.
5.4Peptic Ulcer Disease and GI Bleeding Through their primary action, cholinesterase inhibitors may be expected to increase gastric acid secretion due to increased cholinergic activity. Therefore, patients should be monitored closely for symptoms of active or occult gastrointestinal bleeding, especially those at increased risk for developing ulcers, e.g., those with a history of ulcer disease or those receiving concurrent nonsteroidal anti-inflammatory drugs (NSAIDs). Clinical studies of donepezil hydrochloride tablets in a dose of 5 mg/day to 10 mg/day have shown no increase, relative to placebo, in the incidence of either peptic ulcer disease or gastrointestinal bleeding.
5.6Genitourinary Conditions Although not observed in clinical trials of donepezil hydrochloride tablets, cholinomimetics may cause bladder outflow obstruction.
5.7Neurological Conditions: Seizures Cholinomimetics are believed to have some potential to cause generalized convulsions. However, seizure activity also may be a manifestation of Alzheimer’s disease.
5.8Pulmonary Conditions Because of their cholinomimetic actions, cholinesterase inhibitors should be prescribed with care to patients with a history of asthma or obstructive pulmonary disease.
🤒 Adverse Reactions ▾
6 ADVERSE REACTIONS Most common adverse reactions in clinical studies of donepezil hydrochloride tablets are nausea, diarrhea, insomnia, vomiting, muscle cramps, fatigue, and anorexia ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Torrent Pharma Inc. at 1-800-912-9561 or FDA at 1-800-FDA-1088, or www.fda.gov/medwatch. The following serious adverse reactions are described below and elsewhere in the labeling: Cardiovascular Conditions [see Warnings and Precautions ( 5.2 )] Nausea and Vomiting [see Warnings and Precautions ( 5.3 )] Peptic Ulcer Disease and GI Bleeding [see Warnings and Precautions ( 5.4 )] Genitourinary Conditions [see Warnings and Precautions ( 5.6 )] Neurological Conditions: Seizures [see Warnings and Precautions ( 5.7 )] Pulmonary Conditions [see Warnings and Precautions ( 5.8 )]
6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Donepezil hydrochloride tablets have been administered to over 1,700 individuals during clinical trials worldwide. Approximately 1,200 of these patients have been treated for at least 3 months and more than 1,000 patients have been treated for at least 6 months.
Controlled and uncontrolled trials in the United States included approximately 900 patients. In regards to the highest dose of 10 mg/day, this population includes 650 patients treated for 3 months, 475 patients treated for 6 months, and 116 patients treated for over 1 year. The range of patient exposure is from 1 to 1,214 days Mild to Moderate Alzheimer’s Disease Adverse Reactions Leading to Discontinuation The rates of discontinuation from controlled clinical trials of donepezil hydrochloride tablets due to adverse reactions for the donepezil hydrochloride tablets 5 mg/day treatment groups were comparable to those of placebo treatment groups at approximately 5%.
The rate of discontinuation of patients who received 7-day escalations from 5 mg/day to 10 mg/day was higher at 13%. The most common adverse reactions leading to discontinuation, defined as those occurring in at least 2% of patients and at twice or more the incidence seen in placebo patients, are shown in Table 1. Table 1.
Most Common Adverse Reactions Leading to Discontinuation in Patients with Mild to Moderate Alzheimer’s Disease Adverse Reaction Placebo (n=355)% 5 mg/dayDonepezil Hydrochloride Tablets (n=350)% 10 mg/day Donepezil Hydrochloride Tablets (n=315)% Nausea 1 1 3 Diarrhea 0 <1 3 Vomiting <1 <1 2 Most Common Adverse Reactions The most common adverse reactions, defined as those occurring at a frequency of at least 5% in patients receiving 10 mg/day and twice the placebo rate, are largely predicted by donepezil hydrochloride tablet's cholinomimetic effects.
These include nausea, diarrhea, insomnia, vomiting, muscle cramp, fatigue and anorexia. These adverse reactions were often transient, resolving during continued donepezil hydrochloride tablets treatment without the need for dose modification. There is evidence to suggest that the frequency of these common adverse reactions may be affected by the rate of titration.
An open-label study was conducted with 269 patients who received placebo in the 15- and 30-week studies. These patients were titrated to a dose of 10 mg/day over a 6-week period. The rates of common adverse reactions were lower than those seen in patients titrated to 10 mg/day over one week in the controlled clinical trials and were comparable to those seen in patients on 5 mg/day.
See Table 2 for a comparison of the most common adverse reactions following one and six week titration regimens. Table 2. Comparison of Rates of Adverse Reactions in Mild to Moderate Patients Titrated to 10 mg/day over 1 and 6 Weeks No titration One week titration Six week titration Adverse Reaction Placebo (n=315) % 5 m…
🔄 Drug Interactions ▾
7 DRUG INTERACTIONS Cholinesterase inhibitors have the potential to interfere with the activity of anticholinergic medications ( 7.1 ). A synergistic effect may be expected with concomitant administration of succinylcholine, similar neuromuscular blocking agents, or cholinergic agonists ( 7.2 ).
7.1Use with Anticholinergics Because of their mechanism of action, cholinesterase inhibitors have the potential to interfere with the activity of anticholinergic medications.
7.2Use with Cholinomimetics and Other Cholinesterase Inhibitors A synergistic effect may be expected when cholinesterase inhibitors are given concurrently with succinylcholine, similar neuromuscular blocking agents, or cholinergic agonists such as bethanechol.
👥 Use in Specific Populations ▾
8 USE IN SPECIFIC POPULATIONS Pregnancy: Based on animal data, may cause fetal harm ( 8.1 )
8.1Pregnancy Risk Summary There are no adequate data on the developmental risks associated with the use of donepezil in pregnant women. In animal studies, developmental toxicity was not observed when donepezil was administered to pregnant rats and rabbits during organogenesis, but administration to rats during the latter part of pregnancy and throughout lactation resulted in increased stillbirths and decreased offspring survival at clinically relevant doses [ see Data ]. In the U.S. general population, the estimated background risks of major birth defects and miscarriage in clinically recognized pregnancies are 2% to 4% and 15% to 20%, respectively.
The background risks of major birth defects and miscarriage for the indicated population are unknown. Data Animal Data Oral administration of donepezil to pregnant rats and rabbits during the period of organogenesis did not produce any teratogenic effects at doses up to 16 mg/kg/day (approximately 16 times the maximum recommended human dose [MRHD] of 10 mg/day on a mg/m 2 basis) and 10 mg/kg/day (approximately 20 times the MRHD on a mg/m 2 basis), respectively. Oral administration of donepezil (1, 3, 10 mg/kg/day) to rats during late gestation and throughout lactation to weaning produced an increase in stillbirths and reduced offspring survival through postpartum day 4 at the highest dose.
The no-effect dose of 3 mg/kg/day is approximately 3 times the MRHD on a mg/m 2 basis.
8.2Lactation Risk Summary There are no data on the presence of donepezil or its metabolites in human milk, the effects on the breastfed infant, or on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for donepezil and any potential adverse effects on the breastfed infant from donepezil or from the underlying maternal condition.
8.4Pediatric Use The safety and effectiveness in pediatric patients have not been established.
8.5Geriatric Use Alzheimer’s disease is a disorder occurring primarily in individuals over 55 years of age. The mean age of patients enrolled in the clinical studies with donepezil hydrochloride tablets was 73 years; 80% of these patients were between 65 and 84 years old, and 49% of patients were at or above the age of 75. The efficacy and safety data presented in the clinical trials section were obtained from these patients.
There were no clinically significant differences in most adverse events reported by patient groups ≥65 years old and <65 years old.
🤰 Pregnancy ▾
8.1Pregnancy Risk Summary There are no adequate data on the developmental risks associated with the use of donepezil in pregnant women. In animal studies, developmental toxicity was not observed when donepezil was administered to pregnant rats and rabbits during organogenesis, but administration to rats during the latter part of pregnancy and throughout lactation resulted in increased stillbirths and decreased offspring survival at clinically relevant doses [ see Data ]. In the U.S. general population, the estimated background risks of major birth defects and miscarriage in clinically recognized pregnancies are 2% to 4% and 15% to 20%, respectively.
The background risks of major birth defects and miscarriage for the indicated population are unknown. Data Animal Data Oral administration of donepezil to pregnant rats and rabbits during the period of organogenesis did not produce any teratogenic effects at doses up to 16 mg/kg/day (approximately 16 times the maximum recommended human dose [MRHD] of 10 mg/day on a mg/m 2 basis) and 10 mg/kg/day (approximately 20 times the MRHD on a mg/m 2 basis), respectively. Oral administration of donepezil (1, 3, 10 mg/kg/day) to rats during late gestation and throughout lactation to weaning produced an increase in stillbirths and reduced offspring survival through postpartum day 4 at the highest dose.
The no-effect dose of 3 mg/kg/day is approximately 3 times the MRHD on a mg/m 2 basis.
🧒 Pediatric Use ▾
8.4Pediatric Use The safety and effectiveness in pediatric patients have not been established.
🧓 Geriatric Use ▾
8.5Geriatric Use Alzheimer’s disease is a disorder occurring primarily in individuals over 55 years of age. The mean age of patients enrolled in the clinical studies with donepezil hydrochloride tablets was 73 years; 80% of these patients were between 65 and 84 years old, and 49% of patients were at or above the age of 75. The efficacy and safety data presented in the clinical trials section were obtained from these patients.
There were no clinically significant differences in most adverse events reported by patient groups ≥65 years old and <65 years old.
🆘 Overdosage ▾
10 OVERDOSAGE Because strategies for the management of overdose are continually evolving, it is advisable to contact a Poison Control Center to determine the latest recommendations for the management of an overdose of any drug. As in any case of overdose, general supportive measures should be utilized. Overdosage with cholinesterase inhibitors can result in cholinergic crisis characterized by severe nausea, vomiting, salivation, sweating, bradycardia, hypotension, respiratory depression, collapse and convulsions.
Increasing muscle weakness is a possibility and may result in death if respiratory muscles are involved. Tertiary anticholinergics such as atropine may be used as an antidote for donepezil hydrochloride tablets overdosage. Intravenous atropine sulfate titrated to effect is recommended: an initial dose of 1.0 to 2.0 mg IV with subsequent doses based upon clinical response.
Atypical responses in blood pressure and heart rate have been reported with other cholinomimetics when co-administered with quaternary anticholinergics such as glycopyrrolate. It is not known whether donepezil hydrochloride and/or its metabolites can be removed by dialysis (hemodialysis, peritoneal dialysis, or hemofiltration). Dose-related signs of toxicity in animals included reduced spontaneous movement, prone position, staggering gait, lacrimation, clonic convulsions, depressed respiration, salivation, miosis, tremors, fasciculation and lower body surface temperature.
🧬 Clinical Pharmacology ▾
12 CLINICAL PHARMACOLOGY
12.1Mechanism of Action Current theories on the pathogenesis of the cognitive signs and symptoms of Alzheimer’s disease attribute some of them to a deficiency of cholinergic neurotransmission. Donepezil hydrochloride is postulated to exert its therapeutic effect by enhancing cholinergic function. This is accomplished by increasing the concentration of acetylcholine through reversible inhibition of its hydrolysis by acetylcholinesterase.
There is no evidence that donepezil alters the course of the underlying dementing process.
12.3Pharmacokinetics Pharmacokinetics of donepezil are linear over a dose range of 1 to 10 mg given once daily. The rate and extent of absorption of donepezil hydrochloride tablets are not influenced by food. Donepezil hydrochloride ODT 5 mg and 10 mg are bioequivalent to donepezil hydrochloride 5 mg and 10 mg tablets, respectively. The elimination half life of donepezil is about 70 hours, and the mean apparent plasma clearance (Cl/F) is 0.13 to
0.19L/hr/kg. Following multiple dose administration, donepezil accumulates in plasma by 4 to 7 fold, and steady state is reached within 15 days. The steady state volume of distribution is 12 to 16 L/kg.
Donepezil is approximately 96% bound to human plasma proteins, mainly to albumins (about 75%) and alpha 1 - acid glycoprotein (about 21%) over the concentration range of 2 to 1000 ng/mL. Donepezil is both excreted in the urine intact and extensively metabolized to four major metabolites, two of which are known to be active, and a number of minor metabolites, not all of which have been identified. Donepezil is metabolized by CYP 450 isoenzymes 2D6 and 3A4 and undergoes glucuronidation.
Following administration of 14 C-labeled donepezil, plasma radioactivity, expressed as a percent of the administered dose, was present primarily as intact donepezil (53%) and as 6-O-desmethyl donepezil (11%), which has been reported to inhibit AChE to the same extent as donepezil in vitro and was found in plasma at concentrations equal to about 20% of donepezil. Approximately 57% and 15% of the total radioactivity was recovered in urine and feces, respectively, over a period of 10 days, while 28% remained unrecovered, with about 17% of the donepezil dose recovered in the urine as unchanged drug.
Examination of the effect of CYP2D6 genotype in Alzheimer's patients showed differences in clearance values among CYP2D6 genotype subgroups. When compared to the extensive metabolizers, poor metabolizers had a 31.5% slower clearance and ultra-rapid metabolizers had a 24% faster clearance. Hepatic Disease In a study of 10 patients with stable alcoholic cirrhosis, the clearance of donepezil hydrochloride was decreased by 20% relative to 10 healthy age- and sex-matched subjects.
Renal Disease In a study of 11 patients with moderate to severe renal impairment (Cl C <18 mL/min/1.73 m 2 ) the clearance of donepezil hydrochloride did not differ from 11 age- and sex-matched healthy subjects. Age No formal pharmacokinetic study was conducted to examine age-related differences in the pharmacokinetics of donepezil hydrochloride. Population pharmacokinetic analysis suggested that the clearance of donepezil in patients decreases with increasing age.
When compared with 65-year old, subjects, 90-year old subjects have a 17% decrease in clearance, while 40-year old subjects have a 33% increase in clearance. The effect of age on donepezil clearance may not be clinically significant. Gender and Race No specific pharmacokinetic study was conducted to investigate the effects of gender and race on the disposition of donepezil hydrochloride.
However, retrospective pharmacokinetic analysis and population pharmacokinetic analysis of plasma donepezil concentrations measured in patients with Alzheimer's disease indicates that gender and race (Japanese and Caucasians) did not affect the clearance of donepezil hydrochloride to an important degree. Body Weight There was a relationship noted bet…
🧬 Mechanism of Action ▾
12.1Mechanism of Action Current theories on the pathogenesis of the cognitive signs and symptoms of Alzheimer’s disease attribute some of them to a deficiency of cholinergic neurotransmission. Donepezil hydrochloride is postulated to exert its therapeutic effect by enhancing cholinergic function. This is accomplished by increasing the concentration of acetylcholine through reversible inhibition of its hydrolysis by acetylcholinesterase.
There is no evidence that donepezil alters the course of the underlying dementing process.
📦 How Supplied / Storage and Handling ▾
16 HOW SUPPLIED/STORAGE AND HANDLING
16.1Donepezil Hydrochloride Tablets Donepezil hydrochloride tablets, USP 5 mg are white to off white, circular, biconvex, film coated tablets debossed with ‘5’ on one side and plain on other side. Bottles of 30 NDC 13668-102-30 Bottles of 90 NDC 13668-102-90 Bottles of 500 NDC 13668-102-05 Bottles of 1000 NDC 13668-102-10 Bottles of 4000 NDC 13668-102-40 Donepezil hydrochloride tablets, USP 10 mg are peach colored, circular, biconvex, film coated tablets debossed with ‘10’ on one side and plain on other side. Bottles of 30 NDC 13668-103-30 Bottles of 90 NDC 13668-103-90 Bottles of 500 NDC 13668-103-05 Bottles of 1000 NDC 13668-103-10 Bottles of 2650 NDC 13668-103-26 Storage: Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F). [see USP Controlled Room Temperature].
📋 Description ▾
11 DESCRIPTION Donepezil hydrochloride USP is a reversible inhibitor of the enzyme acetylcholinesterase, known chemically as (±)-2, 3-dihydro-5, 6-dimethoxy-2-[[1-(phenylmethyl)-4-piperidinyl]methyl]-1 H -inden-1-one hydrochloride. Donepezil hydrochloride is commonly referred to in the pharmacological literature as E2020. It has an empirical formula of C 24 H 29 NO 3 HCl and a molecular weight of 415.96.
Donepezil hydrochloride, USP 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 is available for oral administration in film-coated tablets containing 5 or 10 mg of donepezil hydrochloride, USP. Inactive ingredients in 5 mg and 10 mg tablets are lactose monohydrate, magnesium stearate, maize starch ( Zea mays ) and microcrystalline cellulose.
The film coating contains hypromellose, polyethylene glycol, talc and titanium dioxide. Additionally, the 10 mg tablet contains ferric oxide red and ferric oxide yellow as coloring agents. str
💬 Information for Patients ▾
17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information). Instruct patients and caregivers to take donepezil hydrochloride tablets only once per day, as prescribed. Instruct patients and caregivers that donepezil hydrochloride tablets can be taken with or without food.
Advise patients and caregivers that donepezil hydrochloride tablets may cause nausea, diarrhea, insomnia, vomiting, muscle cramps, fatigue, and decreased appetite. Advise patients to notify their healthcare provider if they are pregnant or plan to become pregnant. Manufactured by: Torrent Pharmaceuticals LTD., India.
Manufactured for: Torrent Pharma INC., Basking Ridge, NJ 07920 8106601 Revised: January 2026 logo