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Acetylcholinesterase Inhibitor — Dementia Pregnancy: No clinical data on exposed pregnancies are available; animal studies have shown reproductive toxicity. Caution should be exercised when prescribing to pregnant women. It is not known whether galantamine is excreted in human breast milk and there are no studies in lactating women, therefore women on galantamine should not breast-feed.

Galantamine

Brand names: Reminyl, Reminyl XL

Galantamine is an acetylcholinesterase inhibitor used for the symptomatic treatment of mild to moderate Alzheimer's disease.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: Starting dose 8 mg/day for 4 weeks; initial maintenance dose 16 mg/day for at least 4 weeks; an increase to a maintenance dose of 24 mg/day may then be considered on an individual basis
Route: Oral — prolonged-release hard capsules, swallowed whole with some liquid, preferably with food; the capsules must not be chewed or crushed. For patients with difficulty swallowing, the capsules may be emptied and the tablet cores swallowed whole with liquid (the tablet cores must not be chewed or crushed).
Frequency: Once daily in the morning
Max: 24 mg/day (maximum 16 mg/day in moderate hepatic impairment)
Indication: mild to moderately severe dementia of the Alzheimer type; the diagnosis should be confirmed according to current clinical guidelines by an experienced physician, therapy should occur under the supervision of a physician, and treatment should only be initiated if a caregiver is available to regularly monitor medicinal product intake. Tolerance and dosing should be reassessed regularly, preferably within three months of starting; maintenance treatment can be continued for as long as therapeutic benefit is favourable and the patient tolerates treatment. In individual patients not showing an increased response or not tolerating 24 mg/day, a dose reduction to 16 mg/day should be considered. Discontinuation should be considered when there is no longer evidence of therapeutic effect or if treatment is not tolerated; there is no rebound effect after abrupt discontinuation (e.g. in preparation for surgery). SWITCHING from galantamine tablets or oral solution to prolonged-release capsules: administer the same total daily dose — the last dose of tablets or oral solution should be taken in the evening and the prolonged-release capsule started once daily the following morning. HEPATIC IMPAIRMENT: in moderate impairment (Child-Pugh 7-9), begin with an 8 mg prolonged-release capsule once every other day, preferably in the morning, for one week, then 8 mg once daily for four weeks; daily doses should not exceed 16 mg. No dosage adjustment is required in mild hepatic impairment. Severe hepatic impairment (Child-Pugh >9) is contraindicated. CONCOMITANT TREATMENT: dose reductions can be considered in patients treated with potent CYP2D6 or CYP3A4 inhibitors. PAEDIATRIC: there is no relevant use of galantamine in the paediatric population. Ensure adequate fluid intake during treatment; monitor weight during therapy.

Dose adjustments

Renal

For patients with creatinine clearance >=9 ml/min, no dosage adjustment is required. Galantamine is contraindicated in patients with creatinine clearance less than 9 ml/min. Plasma concentrations may be increased in moderate to severe renal impairment.

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substance or to any of the excipients
  • Severe hepatic impairment (Child-Pugh score greater than 9)
  • Creatinine clearance less than 9 ml/min
  • Patients who have both significant renal and hepatic dysfunction

Side effects

  • Nausea (21%) — very common; mainly during titration, usually lasting less than a week
  • Vomiting (11%) — very common
  • Dizziness, headache, somnolence, syncope, tremor, lethargy — common
  • Decreased appetite, weight decreased, abdominal pain, diarrhoea, dyspepsia — common
  • Bradycardia (common); AV block including complete AV block (uncommon to rare); serious skin reactions — Stevens-Johnson syndrome and acute generalised exanthematous pustulosis (rare)

Interactions

  • Potent CYP2D6 or CYP3A4 inhibitors — galantamine dose reductions can be considered (§4.2, referring to §4.5)
  • Anticholinergic medications — galantamine has the potential to interfere with their activity (US label §7.1)
  • Succinylcholine, other cholinesterase inhibitors, similar neuromuscular blocking agents and cholinergic agonists such as bethanechol — a synergistic effect is expected (US label §7.2)
  • Medicinal products that slow heart rate or affect cardiac conduction — caution because of the vagotonic effects of cholinomimetics on heart rate (§4.4)
  • NOTE: the UK SPC §4.5 was not captured in this bundle; the US-labelled entries above must be checked against the UK SPC §4.5

Clinical monograph

How it works

It reversibly inhibits acetylcholinesterase and additionally acts as an allosteric modulator of nicotinic acetylcholine receptors, enhancing cholinergic neurotransmission.

Prescribing in practice

  • Serious skin reactions including Stevens-Johnson syndrome have been reported, and treatment should be stopped at the first sign of a rash.
  • Use with caution in cardiac conduction disorders, peptic ulcer disease and asthma or COPD because of cholinergic effects, and reduce exposure in hepatic or renal impairment.
  • Avoid in severe hepatic or renal impairment and titrate slowly to limit gastrointestinal intolerance.

Monitoring

Monitor weight, heart rate, cognitive and functional response, and review for gastrointestinal and cardiac adverse effects.

Counselling the patient

  • Take with food to reduce nausea, and report significant weight loss.
  • Stop the medicine and seek advice immediately if a skin rash develops.
  • Report fainting, a slow pulse or persistent vomiting.

Evidence & guidelines

NICE recommends acetylcholinesterase inhibitors including galantamine as options for managing mild to moderate Alzheimer's disease.

Reference: NICE NG97 (Dementia); Cochrane Review (ChEIs in Alzheimer's 2018); Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.