Amantadine 100mg tablets
Requires a prescription from a doctor or prescriber
An antiviral that is used in the prophylactic or symptomatic treatment of influenza A.
Official documents, adverse reaction reporting, and safety monitoring
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Official medicine documents
Safety monitoring data
Yellow Card reports
The MHRA Yellow Card scheme collects reports of suspected side effects from healthcare professionals and patients. View the Drug Analysis Profile (iDAP) for real-world adverse reaction data.
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Suspected adverse reactions reported for Amantadine
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Submit a Yellow Card report to the MHRA
Data from the MHRA Yellow Card scheme. A reported reaction does not necessarily mean the medicine caused it. Contains public sector information licensed under the Open Government Licence v3.0.
EudraVigilance
The European Medicines Agency (EMA) collects suspected adverse reaction reports from across the EU/EEA through the EudraVigilance system. Search for safety data on this medicine.
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Suspected adverse reactions reported for Amantadine
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EudraVigilance data is published by the European Medicines Agency (EMA). A suspected adverse reaction is not necessarily caused by the medicine.
1 branded products available
WHO defined daily dose (DDD)
200 mg
Not a recommended dose. The DDD is the assumed average maintenance dose per day for a drug used for its main indication in adults. It is a statistical measure used for research and comparison purposes only.
Source: WHO Collaborating Centre for Drug Statistics Methodology, distributed via NHS dm+d BNF mapping files. Contains public sector information licensed under the Open Government Licence v3.0.
Therapeutically similar medicines
Similarity based on WHO Anatomical Therapeutic Chemical (ATC) classification and NHS BNF section grouping. Source data: NHS dm+d via TRUD (OGL v3.0), WHO ATC/DDD Index.
NHS prescribing volume and spending trends
Clinical guidelines and formulary information
British National Formulary
Amantadine
Source: British National Formulary, NICE. Joint Formulary Committee. Contains public sector information licensed under the Open Government Licence v3.0.
NICE clinical guidance(5)
Oseltamivir, amantadine (review) and zanamivir for the prophylaxis of influenza (TA158)
Amantadine, oseltamivir and zanamivir for the treatment of influenza (TA168)
Multiple sclerosis in adults: management (NG220)
Parkinson's disease in adults (NG71)
Foslevodopa–foscarbidopa for treating advanced Parkinson's with motor symptoms (TA934)
Source: National Institute for Health and Care Excellence (NICE). Contains public sector information licensed under the Open Government Licence v3.0.
Check stock at pharmacies and supply information
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Search for this medicine at major UK pharmacy chains. These links open the retailer's own website — results depend on their current online catalogue.
Supply & product information
Official product databases and supply status monitoring
Pharmacy links redirect to the retailer's own search and do not represent real-time stock levels. emc (electronic medicines compendium) is operated by Datapharm Ltd. Shortage information sourced from NHS Specialist Pharmacy Service (SPS), sps.nhs.uk.
Codes for healthcare professionals and prescribing systems
These codes are used by healthcare IT systems and prescribers to identify this medicine.
NHS UK identifiers
Browse tools
SNOMED CT and dm+d codes from NHS TRUD (Technology Reference data Update Distribution), licensed under the Open Government Licence v3.0. BNF codes from NHS Business Services Authority (NHSBSA). ATC codes from the WHO Collaborating Centre for Drug Statistics Methodology (whocc.no).
Active and completed clinical studies from ClinicalTrials.gov
Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine (NLM), National Institutes of Health (NIH). Data accessed via ClinicalTrials.gov API v2. Trial information is provided for research purposes and does not constitute medical advice.
Pharmacology and chemical data from DrugBank
Key facts
Drug status
Approved
Major interactions
159 found
Half-life
10 to 14 hours
Mechanism
The mechanism of its antiparkinsonic effect is not fully understood, but it appe…
Food interactions
2 warnings
Human targets
5 targets
Data: DrugBank · CC BY-NC 4.0
Pharmacokinetics at a glance
Absorption
Half-life
10 to 14 hours
Protein binding
67%
Volume of distribution
3 to 8 L/kg
Metabolism
Elimination
Clearance
0.2 - 0.3 L/h
* 0.10 +/- 0.04 L/hr/kg [healthy, elderly male]
Pharmacokinetic data: DrugBank · CC BY-NC 4.0
Known interactions with other medications. Always consult a healthcare professional.
Showing 50 of 1471 interactions
Cardiac dysfunction includes arrhythmia, tachycardia and hypertension. Pulmonary edema and respiratory distress (including ARDS) have been reported. Renal dysfunction including increased BUN, decreased creatinine clearance and renal insufficiency can occur.
Central nervous system effects that have been reported include insomnia, anxiety, aggressive behavior, hypertonia, hyperkinesia, tremor, confusion, disorientation, depersonalization, fear, delirium, hallucination, psychotic reactions, lethargy, somnolence and coma. Seizures may be exacerbated in patients with prior history of seizure disorders. Hyperthermia has also been observed in cases where a drug overdose has occurred.
How the body processes this drug — absorption, distribution, metabolism, and elimination
* 0.10 +/- 0.04 L/hr/kg [healthy, elderly male]
Proteins and enzymes this drug interacts with in the body
Forms excitatory glycinergic receptor complexes with GluN1 alone which are activated by glycine binding to the GluN1 and GluN3 subunits .
PMID:38598639
GluN3A subunit also binds D-serine (By similarity). Each GluN3 subunit confers differential attributes to channel properties, including activation, deactivation and desensitization kinetics, pH sensitivity, Ca2(+) permeability, and binding to allosteric modulators (By similarity). By competing with GIT1 interaction with ARHGEF7/beta-PIX, may reduce GIT1/ARHGEF7-regulated local activation of RAC1, hence affecting signaling and limiting the maturation and growth of inactive synapses (By similarity)
PMID:21645528
Positively regulates postnatal regression of retinal hyaloid vessels via suppression of VEGFR2/KDR activity, downstream of OPN5 (By similarity)
PMID:15609996 PMID:33735609 PMID:8145738
CHRNA7 forms homopentameric neuronal acetylcholine receptors abundantly expressed in the central nervous system, characterized by fast desensitization and high calcium permeability .
PMID:31560909 PMID:33735609 PMID:38382524 PMID:8145738
Also forms heteropentamers with CHRNB2, mainly expressed in basal forebrain cholinergic neurons. Involved in the modulation of calcium-dependent signaling pathways and influences the release of neurotransmitters, including dopamine, glutamate and GABA .
PMID:33239400
Also expressed in non-neuronal cells such as immune cells like lymphocytes, monocytes and macrophages .
PMID:12508119 PMID:16968406 PMID:25259522
In T cells, activation induces metabotropic signaling that results in an increase of intracellular Ca2+ concentrations, independent of ionotropic receptor functions .
PMID:17709503
In macrophages, required for acetylcholine-mediated inhibition of TNF and other inflammatory cytokine release .
PMID:12508119
Once activated by acetylcholine, nicotine or other agonists, selectively inhibits production of pro-inflammatory cytokines while leaving anti-inflammatory cytokines undisturbed .
PMID:12508119 PMID:25259522
Stimulates the cholinergic anti-inflammatory pathway, controlling inflammation by inhibiting NFKB nuclear translocation and activating the JAK2-STAT3 pathway, independently of ion channel activity .
PMID:16968406 PMID:25259522
Also expressed in the urothelium where it modulates reflex bladder activity by increasing intracellular calcium through internal stores and decreasing basal ATP release (By similarity)
PMID:22361591 PMID:27698419 PMID:29720657 PMID:38454578
CHRNA4 forms heteropentameric neuronal acetylcholine receptors with CHRNB2 and CHRNB4, as well as CHRNA5 and CHRNB3 as accesory subunits. Is the most abundant nAChR subtype expressed in the central nervous system .
PMID:16835356 PMID:22361591 PMID:27698419 PMID:29720657 PMID:38454578
Found in two major stoichiometric forms,(CHRNA4)3:(CHRNB2)2 and (CHRNA4)2:(CHRNB2)3, the two stoichiometric forms differ in their unitary conductance, calcium permeability, ACh sensitivity and potentiation by divalent cation .
PMID:27698419 PMID:29720657 PMID:38454578
Involved in the modulation of calcium-dependent signaling pathways, influences the release of neurotransmitters, including dopamine, glutamate and GABA (By similarity)
PMID:31488329 PMID:31708116
CHRNA3 forms heteropentameric neuronal acetylcholine receptors with CHRNB2 and CHRNB4, with CHRNA5, and CHRNB3 as accesory subunits .
PMID:20881005 PMID:8663494
CHRNA3:CHRNB4 being predominant in neurons of the autonomic ganglia, it is known as ganglionic nicotinic receptor .
PMID:31488329
CHRNA3:CHRNB4 or CHRNA3:CHRNA5:CHRNB4 play also an important role in the habenulo-interpeduncular tract, modulating the mesolimbic dopamine system and affecting reward circuits and addiction (By similarity). Hypothalamic CHRNA3:CHRNB4 nAChR activation by nicotine leads to activation of POMC neurons and a decrease in food intake (By similarity).
Also expressed in the urothelium where it modulates reflex bladder activity by increasing intracellular calcium through extracellular influx and basal ATP release (By similarity)
Enzymes involved in drug metabolism — important for understanding drug interactions
Proteins that transport this drug across cell membranes
PMID:9260930 PMID:9687576
Functions as a Na(+)-independent, bidirectional uniporter .
PMID:21128598 PMID:9687576
Cation cellular uptake or release is driven by the electrochemical potential, i.e. membrane potential and concentration gradient .
PMID:15212162 PMID:9260930 PMID:9687576
However, may also engage electroneutral cation exchange when saturating concentrations of cation substrates are reached (By similarity). Predominantly expressed at the basolateral membrane of hepatocytes and proximal tubules and involved in the uptake and disposition of cationic compounds by hepatic and renal clearance from the blood flow .
PMID:15783073
Implicated in monoamine neurotransmitters uptake such as histamine, dopamine, adrenaline/epinephrine, noradrenaline/norepinephrine, serotonin and tyramine, thereby supporting a physiological role in the central nervous system by regulating interstitial concentrations of neurotransmitters .
PMID:16581093 PMID:17460754 PMID:9687576
Also capable of transporting dopaminergic neuromodulators cyclo(his-pro), salsolinol and N-methyl-salsolinol, thereby involved in the maintenance of dopaminergic cell integrity in the central nervous system .
PMID:17460754
Mediates the bidirectional transport of acetylcholine (ACh) at the apical membrane of ciliated cell in airway epithelium, thereby playing a role in luminal release of ACh from bronchial epithelium .
PMID:15817714
Also transports guanidine and endogenous monoamines such as vitamin B1/thiamine, creatinine and N-1-methylnicotinamide (NMN) .
PMID:12089365 PMID:15212162 PMID:17072098 PMID:24961373 PMID:9260930
Mediates the uptake and efflux of quaternary ammonium compound choline .
PMID:9260930
Mediates the bidirectional transport of polyamine agmatine and the uptake of polyamines putrescine and spermidine .
PMID:12538837 PMID:21128598
Able to transport non-amine endogenous compounds such as prostaglandin E2 (PGE2) and prostaglandin F2-alpha (PGF2-alpha) .
PMID:11907186
Also involved in the uptake of xenobiotic 4-(4-(dimethylamino)styryl)-N-methylpyridinium (ASP) .
PMID:12395288 PMID:16394027
May contribute to regulate the transport of organic compounds in testis across the blood-testis-barrier (Probable)
PMID:11388889 PMID:11408531 PMID:12439218 PMID:12719534 PMID:15389554 PMID:16263091 PMID:16272756 PMID:16581093 PMID:19536068 PMID:21128598 PMID:23680637 PMID:24961373 PMID:34040533 PMID:9187257 PMID:9260930 PMID:9655880
Functions as a pH- and Na(+)-independent, bidirectional transporter (By similarity). Cation cellular uptake or release is driven by the electrochemical potential (i.e. membrane potential and concentration gradient) and substrate selectivity (By similarity). Hydrophobicity is a major requirement for recognition in polyvalent substrates and inhibitors (By similarity).
Primarily expressed at the basolateral membrane of hepatocytes and proximal tubules and involved in the uptake and disposition of cationic compounds by hepatic and renal clearance from the blood flow (By similarity). Most likely functions as an uptake carrier in enterocytes contributing to the intestinal elimination of organic cations from the systemic circulation .
PMID:16263091
Transports endogenous monoamines such as N-1-methylnicotinamide (NMN), guanidine, histamine, neurotransmitters dopamine, serotonin and adrenaline .
PMID:12439218 PMID:24961373 PMID:35469921 PMID:9260930
Also transports natural polyamines such as spermidine, agmatine and putrescine at low affinity, but relatively high turnover .
PMID:21128598
Involved in the hepatic uptake of vitamin B1/thiamine, hence regulating hepatic lipid and energy metabolism .
PMID:24961373
Mediates the bidirectional transport of acetylcholine (ACh) at the apical membrane of ciliated cell in airway epithelium, thereby playing a role in luminal release of ACh from bronchial epithelium .
PMID:15817714
Transports dopaminergic neuromodulators cyclo(his-pro) and salsolinol with lower efficency .
PMID:17460754
Also capable of transporting non-amine endogenous compounds such as prostaglandin E2 (PGE2) and prostaglandin F2-alpha (PGF2-alpha) .
PMID:11907186
May contribute to the transport of cationic compounds in testes across the blood-testis-barrier (Probable). Also involved in the uptake of xenobiotics tributylmethylammonium (TBuMA), quinidine, N-methyl-quinine (NMQ), N-methyl-quinidine (NMQD) N-(4,4-azo-n-pentyl)-quinuclidine (APQ), azidoprocainamide methoiodide (AMP), N-(4,4-azo-n-pentyl)-21-deoxyajmalinium (APDA) and 4-(4-(dimethylamino)styryl)-N-methylpyridinium (ASP) PMID:11408531 PMID:15389554 PMID:35469921 PMID:9260930
ATC N04BB01
Chemical identifiers
CAS, UNII, InChI Key and database cross-references
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Chemical identifiers
CAS, UNII, InChI Key and database cross-references
Linked compound data from DrugBank Open Data (CC BY-NC 4.0)
Amantadine
Additional database identifiers
Drugs Product Database (DPD)
9905
ChemSpider
2045
BindingDB
50033369
ZINC
ZINC000000968256
GenBank Gene Database
M23978
GenBank Protein Database
324265
UniProt Accession
M2_I60A0
HUGO Gene Nomenclature Committee (HGNC)
HGNC:16767
GenAtlas
GRIN3A
GeneCards
GRIN3A
GenBank Gene Database
AJ416950
GenBank Protein Database
20372905
UniProt Accession
NMD3A_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:3023
GenAtlas
DRD2
GeneCards
DRD2
GenBank Gene Database
M30625
GenBank Protein Database
181432
Guide to Pharmacology
215
UniProt Accession
DRD2_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:1960
GenAtlas
CHRNA7
GeneCards
CHRNA7
GenBank Gene Database
X70297
GenBank Protein Database
496607
Guide to Pharmacology
468
UniProt Accession
ACHA7_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:1958
GenAtlas
CHRNA4
GeneCards
CHRNA4
GenBank Gene Database
L35901
GenBank Protein Database
755648
Guide to Pharmacology
465
UniProt Accession
ACHA4_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:1957
GeneCards
CHRNA3
GenBank Gene Database
M86383
GenBank Protein Database
177898
Guide to Pharmacology
464
UniProt Accession
ACHA3_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:2719
GenAtlas
DDC
GeneCards
DDC
GenBank Gene Database
M76180
GenBank Protein Database
181521
UniProt Accession
DDC_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:6834
GenAtlas
MAOB
GeneCards
MAOB
GenBank Gene Database
S62734
GenBank Protein Database
398415
Guide to Pharmacology
2490
UniProt Accession
AOFB_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:10966
GeneCards
SLC22A2
GenBank Gene Database
X98333
GenBank Protein Database
2281942
Guide to Pharmacology
1020
UniProt Accession
S22A2_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:10963
GeneCards
SLC22A1
GenBank Gene Database
X98332
GenBank Protein Database
2511670
Guide to Pharmacology
1019
UniProt Accession
S22A1_HUMAN
International reference pricing
Reference pricing from DrugBank. Prices are indicative and may not reflect current UK costs.
Source: DrugBank. Used under CC BY-NC 4.0 academic licence for non-commercial purposes.
Patent information
21 active patents, 11 expired
Source: DrugBank · CC BY-NC 4.0. Patent data sourced from national patent offices. Expiry dates may not reflect extensions, regulatory exclusivity periods, or legal challenges.
DrugBank citations
If you use DrugBank data in your research, please cite the following publications: