Galantamine
Brand names: Reminyl, Reminyl XL
Galantamine is an acetylcholinesterase inhibitor used for the symptomatic treatment of mild to moderate Alzheimer's disease.
Adult dose
Dose adjustments
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.
- SMART Risk Score for Recurrent CVD · Cardiovascular Risk
- PCSK9 Inhibitor Eligibility Assessment · Lipid Management
- Mini-Mental State Examination (MMSE) · Cognitive Assessment
- MoCA — Montreal Cognitive Assessment · Cognitive Assessment
- FAST Scale for Alzheimer's Dementia · Dementia Staging
- Mini-Mental State Examination (MMSE) · Cognitive Assessment
- Acute Stroke / TIA Assessment · NICE NG128; RCP Stroke Guidelines 2023
- Status Epilepticus (Adults) · NICE CG137; ESEM guidelines; RCP Neurology Guidelines
- Suspected Subarachnoid Haemorrhage · NICE NG228; RCEM 2023; AHA/ASA 2023
- Adult Head Injury · NICE NG232 (2023)
- Bell's Palsy / Facial Nerve Palsy · ENT UK 2017; AAN
- Vertigo Workup · ENT UK; NICE CKS