Zeki at 07:46, 4 November 2024

2024-11-04T07:46:07Z

← Older revision		Revision as of 03:46, 4 November 2024
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	'''Donepezil (ARICEPT)'''（中文：[[多奈哌齊]]）		'''Donepezil (ARICEPT)'''（中文：[[多奈哌齊]]）
			==Common Strengths==
			Donepezil is available in the following strengths:
			*Tablets: 5mg, 10 mg
			*Orally Disintegrating Tablets (ODT): 5 mg, 10 mg

			==Drug Trade Names==
			*Aricept

			==Drug Usage==
			Donepezil is indicated for:
			*Treatment of mild, moderate, and severe dementia due to Alzheimer's disease.
			*Off-label uses may include vascular dementia and dementia related to Parkinson's disease.

			==Mechanism of Action==
			Donepezil works by inhibiting the enzyme acetylcholinesterase. This inhibitor prevents the breakdown of acetylcholine, thereby increasing the concentration of acetylcholine in the brain, which is crucial for memory and cognitive functions.

			==Route of Administration==
			Donepezil can be administered orally as tablets or orally disintegrating tablets

			==Dosages==
			*Initial: 5 mg once daily at bedtime.
			*Maintenance: May increase to 10 mg after 4-6 weeks.

			==Side Effects==
			{\| class="wikitable"
			!style="text-align: left"\| Frequency
			!Adverse reactions
			\|-
			\| rowspan="4" \| '''Common Side Effects
			\| Nausea
			\|-
			\| Diarrhea
			\|-
			\| Insomnia
			\|-
			\| Loss of appetite
			\|-
			\| rowspan="4" \| '''Serious Side Effects
			\| Bradycardia (slow heart rate)
			\|-
			\| Gastrointestinal Bleeding
			\|-
			\| Seizures
			\|-
			\| Severe allergic reactions (e.g. difficulty breathing)
			\|}

			==Pharmacokinetics==
			Donepezil has a half-life of approximately 70 hours, allowing for once-daily dosing. The onset of action typically occurs within a few weeks, with maximum effects seen after several months of treatment.

			==Drug Precautions==
			'''Pregnancy

			There is little information available about the effects of donepezil on pregnancy and fetal development. As a result, healthcare providers typically advise against its use unless necessary.

			'''Breastfeeding

			Donepezil is excreted in breast milk; caution should be exercised when administered to nursing mothers.

			'''Children and Elderly

			Safety and efficacy have not been established in children. In elderly patients, monitoring for side effects is crucial due to increased sensitivity.

			'''Drug Monitoring Items

			Regular monitoring should include:
			*Heart rate and rhythm (due to bradycardia risk)
			*Gastrointestinal symptoms (to detect potential bleeding)
			*Cognitive function assessments to evaluate efficacy

			'''Drug Interactions

			Donepezil may interact with various medications, particularly those affecting heart rhythm or gastrointestinal function. Notable interactions include:
			*'''Anticholinergic Medications''':
			**Anticholinergics (e.g. antihistamines, medications for overactive bladder) may diminish the effects of donepezil, potentially worsening symptoms of Alzheimer's disease due to their opposing mechanisms.
			*Cholinergic Agents:
			**Combining donepezil with other cholinesterase inhibitor (like neostigmine) can lead to synergistic effects, increasing the risk of cholinergic side effects.
			*Beta-Blockers:
			**Drugs such as metoprolol and carvedilol may increase the risk of bradycardia when taken with donepezil. Patients should be monitored for heart rate changes.
			*Nonsteroidal Anti-Inflammatory Drugs (NSAIDs):
			**The concurrent use of NSAIDs (e.g. ibuprofen, naproxen) may increase the risk of gastrointestinal bleeding and ulcers, especially in patients with a history of such conditions.
			*CYP450 Enzyme Interactions:
			**Donepezil is metabolized by CYP3A4 and to a lesser extent CYP2D6.
			**Inhibitors of these enzymes (like ketoconazole and fluoxetine) can increase donepezil levels in the body, while inducers (such as rifampicin and phenytoin) may reduce its effectiveness by increasing its clearance.

			==FAQ==
			'''How Should I Take the Tablet?

			Take donepezil once daily at bedtime, with or without food.

			'''What Should I Avoid While Taking?

			Avoid other medications that may affect heart rate or gastrointestinal function without consulting a healthcare provider.

			'''What Happens if I Miss a Dose?

			If you miss a dose, take it as soon as you remember on the same day; if it is close to the next dose, skip the missed dose and return to your regular schedule.

Zeki: Created page with "Category: DrugsCategory: Acetylcholinesterase inhibitor '''Antidementia Drug''' '''Drug class: :Category: Acetylcholinesterase i..."

2024-11-04T06:42:45Z

Created page with "Category: Drugs Category: Acetylcholinesterase inhibitor '''Antidementia Drug''' '''Drug class: :Category: Acetylcholinesterase i..."

New page

[[Category: Drugs]][[Category: Acetylcholinesterase inhibitor]]

[[:Category: Antidementia Drug | '''Antidementia Drug''']]

'''Drug class: [[:Category: Acetylcholinesterase inhibitor | Acetylcholinesterase Inhibitor]]'''

'''Donepezil (ARICEPT)'''（中文：[[多奈哌齊]]）

Donepezil - Revision history

Zeki at 07:46, 4 November 2024

Zeki: Created page with "Category: DrugsCategory: Acetylcholinesterase inhibitor '''Antidementia Drug''' '''Drug class: :Category: Acetylcholinesterase i..."