Cyclopentamine

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title: "Cyclopentamine" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["cycloalkylalkylamines", "cyclopentyl-compounds", "decongestants", "norepinephrine-dopamine-releasing-agents", "stimulants", "sympathomimetics"] description: "Decongestant and stimulant drug" topic_path: "general/cycloalkylalkylamines" source: "https://en.wikipedia.org/wiki/Cyclopentamine" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Decongestant and stimulant drug ::

| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 437204019 | IUPAC_name = (RS)-1-Cyclopentyl-N-methylpropan-2-amine | image = Cyclopentamine.svg | image_class = skin-invert-image | width = 200 | image2 = Cyclopentamine3d.png | image_class2 = bg-transparent | chirality = Racemic mixture | tradename = | pregnancy_category = | legal_status = Uncontrolled | routes_of_administration = Topical (nasal spray)

| bioavailability = | metabolism = | elimination_half-life = | excretion =

| CAS_number_Ref = | CAS_number = 102-45-4 | ATC_prefix = R01 | ATC_suffix = AA02 | PubChem = 7608 | ChemSpiderID_Ref = | ChemSpiderID = 7326 | DrugBank_Ref = | DrugBank = DB08999 | UNII_Ref = | UNII = WB9Q6M8O60 | KEGG_Ref = | KEGG = D07370 | ChEMBL_Ref = | ChEMBL = 329203

| C=9 | H=19 | N=1 | smiles = N(C)C(CC1CCCC1)C | StdInChI_Ref = | StdInChI = 1S/C9H19N/c1-8(10-2)7-9-5-3-4-6-9/h8-10H,3-7H2,1-2H3 | StdInChIKey_Ref = | StdInChIKey = HFXKQSZZZPGLKQ-UHFFFAOYSA-N | synonyms = N,α-dimethyl-cyclopenaneethylamine | boiling_point = 171

Cyclopentamine (trade names Clopane, Cyclonarol, Cyclosal, Cyklosan, Nazett, Sinos, among others) is a sympathomimetic and vasoconstrictor drug of the alkylamine family and related to the arylalkylamines. Cyclopentamine was indicated in the past as an over-the-counter (OTC) medication for use as a nasal decongestant, notably in Europe and Australia, but has now been largely discontinued.

Pharmacology

Cyclopentamine acts as a releasing agent of the catecholamine neurotransmitters norepinephrine (noradrenaline), epinephrine (adrenaline), and dopamine. Its effects on norepinephrine and epinephrine mediate its decongestant effects, while its effects on all three neurotransmitters are responsible for its stimulant properties. When ingested orally in sufficient quantities, cyclopentamine produces similar effects to amphetamine, methamphetamine, and propylhexedrine.

Chemistry

Cyclopentamine is the cyclopentane homolog of propylhexedrine, differing only in terms of the contracted ring size of a cyclopentane, containing one —CH2— unit less than the cyclohexyl group.

In terms of the acyclic part of the molecule, both cyclopentamine and propylhexedrine are the same as methamphetamine, all three molecules containing the 2-methylaminopropyl side-chain. The difference between them is that whereas methamphetamine is an aromatic molecule containing a phenyl group, cyclopentamine and propylhexedrine are entirely aliphatic and contain no delocalized electrons at all. The effect that this has on potency is that the reduced alicyclic-alkylamines are weaker than unsaturated (meth)amphetamine.

References

References

1. (July 1964). "A Nonsympathomimetic Effect of Cyclopentamine and Beta-Mercaptoethylamine in the Rabbit Ileum". The Journal of Pharmacology and Experimental Therapeutics.
2. (July 1969). "In vitro evaluation of a series of sympathomimetic amines and the beta-adrenergic blocking properties of cyclopentamine". Journal of Pharmaceutical Sciences.
3. (August 1971). "Actions of dexamphetamine and amphetamine-like amines in chickens with brain transections". British Journal of Pharmacology.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::