phenylpropanolamine: Definition from Answers.com

Phenylpropanolamine
Systematic (IUPAC) name

(1R,2S)-2-amino-1-phenyl-propan-1-ol
Identifiers
CAS number	14838-15-4
ATC code	R01BA01
PubChem	26934
DrugBank	APRD00457
ChemSpider	25082
Chemical data
Formula	C₉H₁₃N O
Mol. mass	151.206 g/mol
Pharmacokinetic data
Bioavailability	?
Metabolism	?
Half life	2.1 to 3.4 hours.
Excretion	?
Therapeutic considerations
Pregnancy cat.	?
Legal status	GSL(UK) ?(US) ℞-only
Routes	Oral
Y(what is this?) (verify)

Phenylpropanolamine (PPA; Accutrim, Dexatrim), also known as norephedrine and oxyamphetamine, is a psychoactive drug of the phenethylamine and amphetamine chemical classes which is used as a stimulant, decongestant, and anorectic agent.^[1]^[2] It is commonly used in prescription and over-the-counter cough and cold preparations. In veterinary medicine, it is used to control urinary incontinence in dogs under trade names Propalin and Proin.

In the United States, PPA is no longer sold without a prescription due to a proposed increased risk of stroke in younger women. In Europe, however, it is still available by both prescription and over-the-counter. In Canada, it was withdrawn from the market on May 31, 2001.^[2]

1 Pharmacology
2 Chemistry
3 Side Effects
4 Legal Status
5 See also
6 References
7 External links

Pharmacology

PPA acts as a potent and selective releasing agent of norepinephrine and epinephrine, or as a norepinephrine releasing agent (NRA). It also acts as a dopamine releasing agent (DRA) to a lesser extent.

Chemistry

There are four optical isomers of PPA: dextro- and levo- nor ephedrine, and dextro- and levo- nor pseudoephedrine. d-Norpseudoephedrine is also known as cathine, and occurs naturally in Catha edulis ("Khat").^{[citation needed]}

Just as ephedrine can be chemically reduced into methamphetamine, PPA may be chemically reduced into amphetamine. Structurally, PPA is to ephedrine, just as amphetamine is to methamphetamine, and as cathinone is to methcathinone. PPA can also be used in the synthesis of phenmetrazine and 4-methylaminorex.

Synthesis is a standard Henry reaction between benzaldehyde and nitroethane, although care is taken not to dehydrate the alcohol. Reduction is usually done with a mild agent including zinc. The products of this step can be vacuum distilled.^{[citation needed]}

Side Effects

A scientific study^[3] found an increased risk of hemorrhagic stroke in women who used PPA, although it is not clear which isomer is to blame. A study at the Yale University School of Medicine in 1999 had produced similar results.[1] Reports of cases of hemorrhagic strokes in PPA users had been circulating since the 1970s.

A report from the Dept. of Psychiatry, F. Edward Hebert School of Medicine, Bethesda, Maryland in Pharmacopsychiatry^[4] states:

We have reviewed 37 cases (published in North America and Europe since 1960) that received diagnoses of acute mania, paranoid schizophrenia, and organic psychosis and that were attributed to PPA product ingestion. Of the 27 North American case reports, more reactions followed the ingestion of combination products than preparations containing PPA alone; more occurred after ingestion of over-the-counter products than those obtained by prescription or on-the-street; and more of the cases followed ingestion of recommended doses than overdoses.
Failure to recognize PPA as an etiological agent in the onset of symptoms usually led to a diagnosis of schizophrenia or mania, lengthy hospitalization, and treatment with substantial doses of neuroleptics or lithium.

Legal Status

In Europe, PPA is still available in prescription decongestants such as Rinexin ^[5], as well as over-the-counter medications such as Wick DayMed.

In the United Kingdom, PPA is available in many 'all in one' cough and cold medications which usually also feature paracetamol or another analgesic and caffeine. It can also be purchased on its own. It is classed as GSL (general sale license) and is completely derestricted, therefore saleable by any shop.

In the United States, the Food and Drug Administration (FDA) issued a public health advisory^[6] against the use of the drug in November 2000. In this advisory, the FDA requested that all drug companies discontinue marketing products containing PPA. The agency estimates that PPA caused between 200 and 500 strokes per year among 18-to-49-year-old users. In 2005, the FDA removed PPA from over-the-counter sale.^[7] Because of its potential use in amphetamine manufacture, it is controlled by the Combat Methamphetamine Epidemic Act of 2005. It is still available for veterinary use in dogs, however, as a treatment for urinary incontinence.

Internationally, an item on the agenda of the 2000 Commission on Narcotic Drugs session called for including PPA in Table I of United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances^[8]

PPA is available in India in the form of a combination tablet with cetirizine as Alerid-D, which is manufactured by Cipla. It is also present in popular cold and flu treatment medicine D-Cold Total available over the counter.

References

^ Flavahan NA (April 2005). "Phenylpropanolamine constricts mouse and human blood vessels by preferentially activating alpha2-adrenoceptors". J. Pharmacol. Exp. Ther. 313 (1): 432–9. doi:10.1124/jpet.104.076653. PMID 15608085. http://jpet.aspetjournals.org/cgi/pmidlookup?view=long&pmid=15608085.
^ ^a ^b Health Canada withdraws drug products containing phenylpropanolamine (PPA) from the market
^ Kernan WN, Viscoli CM, Brass LM, et al. (December 2000). "Phenylpropanolamine and the risk of hemorrhagic stroke". N. Engl. J. Med. 343 (25): 1826–32. doi:10.1056/NEJM200012213432501. PMID 11117973. http://content.nejm.org/cgi/content/abstract/343/25/1826.
^ Lake CR, Masson EB, Quirk RS (July 1988). "Psychiatric side effects attributed to PPA". Pharmacopsychiatry 21 (4): 171–81. doi:10.1055/s-2007-1014671. PMID 3060884.
^ Rinexin in Farmaceutiska Specialiteter i Sverige - the Swedish official drug catalog.(in Swedish)
^ Food and Drug Administration Public Health Advisory, "Safety of Phenylpropanolamine"
^ FDA moves PPA from OTC
^ Implementation of the international drug control treaties: changes in the scope of control of substances, Commission on Narcotic Drugs, Forty-third session, Vienna, 6-15 March 2000.

External links

Phenylpropanolamine Information Page at www.FDA.gov
A Dose of Denial: How drug makers sought to keep popular cold and diet remedies on store shelves after their own study linked them to strokes. By Kevin Sack and Alicia Mundy.Los Angeles Times, March 28, 2004.
Doubt Is Their Product by David Michaels, Scientific American, June 2005
Phenylpropanolamine by Richard Clapp, a case study at DefendingScience.org
Widely Circulated Email About Phenylpropanolamine Description of widely circulated email using out-of-date information about Phenylpropanolamine.
Treatment of urethral sphincter mechanism incompetence in 11 bitches with a sustained-release formulation of phenylpropanolamine hydrochloride Use of Phenylpropanolamine in dogs.

v • d • e Stimulants

Adamantanes	Adaphenoxate • Adapromine • Amantadine • Bromantane • Chlodantane • Gludantane • Memantine • Midantane

Arylcyclohexylamines	Benocyclidine • Dieticyclidine • Esketamine • Eticyclidine • Gacyclidine • Ketamine • Phencyclamine • Phencyclidine • Rolicyclidine • Tenocyclidine • Tiletamine •

Benzazepines	6-Br-APB • SKF-81297 • SKF-82958

Cholinergics	A-84543 • A-366,833 • ABT-202 • ABT-418 • AR-R17779 • Altinicline • Anabasine • Arecoline • Cotinine • Cytisine • Dianicline • Epibatidine • Epiboxidine • GTS-21 • Ispronicline • Nicotine • PHA-543,613 • PNU-120,596 • PNU-282,987 • Pozanicline • Rivanicline • Sazetidine A • SIB-1553A • SSR-180,711 • TC-1698 • TC-1827 • TC-2216 • TC-5619 • Tebanicline • UB-165 • Varenicline

Convulsants	Anatoxin-a • Bicuculline • DMCM • Flurothyl • Gabazine • Pentetrazol • Picrotoxin • Strychnine • Thujone

Eugeroics	Adrafinil • Armodafinil • Modafinil

Oxazolines	4-Methylaminorex • Aminorex • Clominorex • Cyclazodone • Fenozolone • Fluminorex • Pemoline • Thozalinone

Phenethylamines	2-Fluoroamphetamine • 2-OH-PEA • 2-Phenyl-3-aminobutane • 2-Phenyl-3-methylaminobutane • 2,3-MDA • 3-Fluoroamphetamine • 3-Methoxyamphetamine • 3-Methylamphetamine • 4-BMC • 4-Ethylamphetamine • 4-FA • 4-FMA • 4-MA • 4-MMA • 4-MTA • Alfetamine • α-Ethylphenethylamine • Amfecloral • Amfepentorex • Amidephrine • Amphetamine (Dextroamphetamine, Levoamphetamine) • Amphetaminil • Arbutamine • Atomoxetine (Tomoxetine) • β-Methylphenethylamine • Benfluorex • Benzphetamine • BDB (J) • BOH (Hydroxy-J) • BPAP • Buphedrone • Bupropion (Amfebutamone) • Butylone • Cathine • Cathinone • Chlorphentermine • Clenbuterol • Clobenzorex • Clortermine • Denopamine • Diethylcathinone (Diethylpropion, Amfepramone) • Dimethoxyamphetamine • Dimethylamphetamine • Dimethylcathinone (Dimethylpropion, Metamfepramone) • Dobutamine • DOPA (Dextrodopa, Levodopa) • Dopamine • Dopexamine • Droxidopa • EBDB (Ethyl-J) • Ephedrine • Epinephrine (Adrenaline) • Epinine (Deoxyepinephrine) • Etafedrine • Ethcathinone (Ethylpropion) • Ethylamphetamine (Etilamfetamine) • Ethylone • Etilefrine • Fenbutrazate • Fencamine • Fencamfamine • Fenethylline • Fenfluramine (Dexfenfluramine) • Fenproporex • Flephedrone • Fludorex • Furfenorex • Gepefrine • HMMA • Hordenine • Ibopamine • Indanorex • IMP • Indanylamphetamine • Isoetarine • Isoprenaline (Isoproterenol) • Lefetamine • Lisdexamfetamine • Lophophine (Homomyristicylamine) • Manifaxine • MBDB (Methyl-J; "Eden") • MDA (Tenamfetamine) • MDBU • MDEA ("Eve") • MDMA ("Ecstasy", "Adam") • MDMPEA (Homarylamine) • MDOH • MDPR • MDPEA (Homopiperonylamine) • Medifoxamine • Mefenorex • Mephedrone • Mephentermine • Metanephrine • Metaraminol • Methamphetamine (Desoxyephedrine, Methedrine; Dextromethamphetamine, Levomethamphetamine) • Methoxamine • Methoxyphenamine • MMA • Methcathinone (Methylpropion) • Methedrone • Methoxyphenamine • Methylone • MMDA • MMDMA • MMMA • Naphthylamphetamine • Nisoxetine • Norepinephrine (Noradrenaline) • Norfenefrine • Norfenfluramine • Normetanephrine • Octopamine • Orciprenaline • Ortetamine • Oxaflozane • Oxilofrine • Paredrine (Norpholedrine, Oxamphetamine, Mycadrine) • PBA • PCA • PHA • Pargyline • Phendimetrazine • Phenmetrazine • Phenpentermine • Phenpromethamine • Phentermine • Phenylalanine • Phenylephrine (Neosynephrine) • Phenylpropanolamine • Pholedrine • PIA • PMA • PMEA • PMMA • PPAP • Propylamphetamine • Pseudoephedrine • Radafaxine • Ropinirole • Salbutamol (Albuterol; Levosalbutamol) • Selegiline (Deprenyl) • Sibutramine • Synephrine (Oxedrine) • Theodrenaline • Tiflorex (Flutiorex) • Tranylcypromine • Tyramine • Tyrosine • Xamoterol • Xylopropamine • Zylofuramine

Piperazines	2C-B-BZP • BZP • DBL-583 • GBR-12783 • GBR-12935 • GBR-13069 • GBR-13098 • GBR-13119 • MeOPP • MBZP • Vanoxerine

Piperidines	2-Benzylpiperidine • 4-Benzylpiperidine • Desoxypipradrol • Diphemethoxidine • Ethylphenidate • Methylnaphthidate • Methylphenidate (Dexmethylphenidate) • Nocaine • Phacetoperane • Pipradrol • SCH-5472

Pyrrolidines	α-PPP • α-PBP • α-PVP • MDPPP • MDPBP • MDPV • MPBP • MPHP • MPPP • MOPPP • Naphyrone • Prolintane • Pyrovalerone

Tropanes	3α-Bis-(4-fluorophenyl)methoxytropane • 3-CPMT • 3-Pseudotropyl-4-fluorobenzoate • Altropane (IACFT) • Brasofensine • CFT (WIN 35,428) • β-CIT (RTI-55) • Cocaethylene • Cocaine • β-CPPIT • Dichloropane (RTI-111) • Difluoropine • FE-β-CPPIT • FP-β-CPPIT • Ioflupane (¹²³I) • Norcocaine • PIT • PTT • RTI-31 • RTI-32 • RTI-51 • RTI-112 • RTI-113 • RTI-121 (IPCIT) • RTI-126 • RTI-150 • RTI-171 • RTI-177 • RTI-336 • RTI-371 • RTI-386 • Tesofensine • Troparil (β-CPT, WIN 35,065-2) • Tropoxane • WF-23 • WF-33 • WF-60

Xanthines	Aminophylline • Caffeine • Dimethazan • Paraxanthine • Theobromine • Theophylline

Others	1-(Thiophen-2-yl)-2-aminopropane • 2-Amino-1,2-dihydronaphthalene • 2-Aminoindane • 2-Aminotetralin • 2-Diphenylmethylpyrrolidine • 5-(2-Aminopropyl)indole • AL-1095 • Amfonelic acid • Amineptine • Amiphenazole • Atipamezole • Bemegride • Benzydamine • BTQ • BTS 74,398 • Carphedon • Clofenciclan • Cropropamide • Crotetamide • Diclofensine • Dimethocaine • Diphenylprolinol • Efaroxan • Etamivan • Feprosidnine • Gamfexine • Gilutensin • GYKI-52895 • Hexacyclonate • Idazoxan • Indatraline • JNJ-7925476 • ‎ JZ-IV-10 • Lazabemide • Leptacline • LR-5182 • Mazindol • Meclofexonate • Mefexamide • Mesocarb • Nefopam • Nikethamide • Nomifensine • O-2172 • Oxaprotiline • Phthalimidopropiophenone • Propylhexedrine • PRC200-SS • Rasagiline • Rauwolscine • Tametraline • Tandamine • U-23807A • UH-232 • Yohimbine •

See also Sympathomimetic amines

Decongestants and other nasal preparations (R01)

Topical

Sympathomimetics, plain	Cyclopentamine • Ephedrine • Phenylephrine • Oxymetazoline • Tetryzoline • Xylometazoline • Naphazoline • Tramazoline • Metizoline • Tuaminoheptane • Fenoxazoline • Tymazoline • Epinephrine

Antiallergic agents, excluding corticosteroids	Spaglumic acid histamine antagonists (Levocabastine, Antazoline, Thonzylamine) mast cell stabilizer (some are also antihistamines) (Cromoglicic acid, Nedocromil, Azelastine, Olopatadine)

Corticosteroids	Beclometasone • Prednisolone • Dexamethasone • Flunisolide • Budesonide • Betamethasone • Tixocortol • Fluticasone • Mometasone furoate • Triamcinolone • Ciclesonide

Other nasal preparations	Calcium hexamine thiocyanate • Retinol • Ipratropium bromide • Ritiometan • Mupirocin • Hexamidine • Framycetin • Hyaluronic acid • Eucalyptus oil

Systemic use:
Sympathomimetics

Phenylpropanolamine • Pseudoephedrine • Phenylephrine • Phenylpropylamine

Antiobesity Agents / Anorectics (A08)

Central

Stimulants	4-Methylamphetamine • Amfecloral • Amfepentorex • Aminorex • Amphetamine • Amphetaminil • Atomoxetine • Benfluorex • Benzphetamine • Bupropion • Cathine • Cathinone • Chlorphentermine • Clobenzorex • Clominorex • Clortermine • Dexfenfluramine • Dextroamphetamine • Dextromethamphetamine • Dexmethylphenidate • Diethylcathinone • Dimethylcathinone • Diphemethoxidine • Ephedrine • Ephedra • Ethylamphetamine • Fencamfamine • Fenethylline • Fenfluramine • Fenproporex • Fludorex • Fluminorex • Furfenorex • Indanorex • Khat • Lisdexamfetamine • Manifaxine • Mazindol • Mefenorex • Methamphetamine • Methylphenidate • Pemoline • Phendimetrazine • Phenethylamine • Phenmetrazine • Phenpentermine • Phentermine • Phenylpropanolamine • Pipradrol • Prolintane • Pseudoephedrine • Pyrovalerone • Radafaxine • Reboxetine • Sibutramine • Synephrine • Tesofensine • Viloxazine • Xylopropamine • Zylofuramine

Cannabinoids	Ibipinabant • Otenabant • Rimonabant • Surinabant • Taranabant

Others	5-HTP • Galactomannan (Guar Gum) • Glucomannan • L-DOPA • L-Phenylalanine • L-Tryptophan • L-Tyrosine • Lorcaserin • Lu AA-33810 • Metformin • Naltrexone • Naloxone • Oxyntomodulin • P57 • Peptide YY • Topiramate • Yohimbine (Yohimbe) • Zonisamide

Peripheral

Cetilistat • Dinitrophenol • Oleoyl-Estrone • Orlistat • Simmondsin • Sterculia

Adrenergics

Receptor
Ligands

α₁	Agonists: Amidephrine • Cirazoline • Dopamine • Epinephrine (Adrenaline) • Etilefrine • Isoprenaline • Levonordefrin • Metaraminol • Methoxamine • Methyldopa • Norepinephrine (Noradrenaline) • Oxymetazoline • Phenylephrine Antagonists: Alfuzosin • Arotinolol • Carvedilol • Doxazosin • Indoramin • L-765,314 • Labetalol • Moxisylyte • Nantenine • Phentolamine • Phenoxybenzamine • Prazosin • Silodosin • Tamsulosin • Terazosin • Tolazoline • Trimazosin • Urapidil

α₂	Agonists: (R)-3-Nitrobiphenyline • 4-NEMD • Amitraz • Apraclonidine • Brimonidine • Clonidine • Detomidine • Dexmedetomidine • Dopamine • Epinephrine (Adrenaline) • Etilefrine • Guanabenz • Guanfacine • Guanethidine • Guanoxabenz • Levonordefrin • Lofexidine • Medetomidine • Methyldopa • Norepinephrine (Noradrenaline) • Octopamine • Romifidine • Tizanidine • Tolonidine • Xylazine • Xylometazoline Antagonists: 1-PP • Atipamezole • BRL-44408 • Buspirone • Cirazoline • Efaroxan • Gepirone • Idazoxan • Ipsapirone • Mianserin • Mirtazapine • NAN-190 • Phentolamine • Phenoxybenzamine • Rauwolscine • SB-269,970 • Setiptiline • Spiroxatrine • Tandospirone • Tolazoline • Yohimbine

α_?	Agonists: Anisodamine • Ephedrine • Ergotamine • Indanidine • Mephentermine • Midodrine • Mivazerol • Naphazoline • Phenylpropanolamine • Pseudoephedrine • Rilmenidine • Synephrine • Talipexole • Tetrahydrozoline

β₁	Agonists: Denopamine • Dobutamine • Dopamine • Epinephrine (Adrenaline) • Etilefrine • Levonordefrin • Methyldopa • Norepinephrine (Noradrenaline) Antagonists: Acebutolol • Alprenolol • Amosulalol • Arotinolol • Atenolol • Bupranolol • Carvedilol • Celiprolol • Betaxolol • Bisoprolol • Dichloroisoprenaline • Esmolol • Labetalol • Metipranolol • Metoprolol • Nadolol • Nebivolol • Oxprenolol • Penbutolol • Pindolol • Practolol • Pronethalol • Propranolol • Sotalol • Tertatolol • Timolol • Tilisolol • Xamoterol

β₂	Agonists: Arformoterol • Bambuterol • Bitolterol • Carbuterol • Clenbuterol • Dopamine • Dopexamine • Epinephrine (Adrenaline) • Etilefrine • Fenoterol • Formoterol • Hexoprenaline • Indacaterol • Levonordefrin • Levosalbutamol • Methyldopa • Norepinephrine (Noradrenaline) • Orciprenaline • Pirbuterol • Procaterol • Reproterol • Rimiterol • Ritodrine • Salbutamol (Albuterol) • Salmeterol • Terbutaline • Tulobuterol Antagonists: Alprenolol • Amosulalol • Arotinolol • Bupranolol • Butaxamine • Carvedilol • Dichloroisoprenaline • ICI 118551 • Labetalol • Metipranolol • Nadolol • Oxprenolol • Penbutolol • Pindolol • Pronethalol • Propranolol • Sotalol • Tertatolol • Timolol • Tilisolol

β₃	Agonists: Amibegron • Arotinolol • Dopamine • Epinephrine (Adrenaline) • Etilefrine • Labetalol • Levonordefrin • Methyldopa • Norepinephrine (Noradrenaline) • Solabegron Antagonists: Carvedilol • SR 59230A

β_?	Agonists: Arbutamine • BAAM • Befunolol • Broxaterol • Buphenine • Cimaterol • Ephedrine • Higenamine • Isoetarine • Isoxsuprine • Mabuterol • Methoxyphenamine • Oxyfedrine • Prenalterol • Pseudoephedrine • Ractopamine • Tretoquinol • Zilpaterol • Zinterol

Reuptake
Inhibitors

Plasmalemmal

NET Inhibitors	Norepinephrine Reuptake Inhibitors: Atomoxetine (Tomoxetine) • Ciclazindol • Mazindol • Nisoxetine • Reboxetine • Tandamine • Tapentadol • Viloxazine; Norepinephrine-Dopamine Reuptake Inhibitors: Amineptine • Bupropion (Amfebutamone) • Fencamine • Fencamfamine • Lefetamine • LR-5182 • Manifaxine • Methylphenidate • Nomifensine • O-2172 • Radafaxine; Serotonin-Norepinephrine Reuptake Inhibitors: Bicifadine • Desvenlafaxine • Duloxetine • Milnacipran • Sibutramine • Tramadol • Venlafaxine; Serotonin-Norepinephrine-Dopamine Reuptake Inhibitors: Brasofensine • Diclofensine • DOV-102,677 • DOV-21,947 • DOV-216,303 • JNJ-7925476 • JZ-IV-10 • Methylnaphthidate • Naphyrone • NS-2359 • PRC200-SS • SEP-225,289 • SEP-227,162 • Tesofensine; Tricyclic Antidepressants: Amitriptyline • Butriptyline • Cianopramine • Clomipramine • Desipramine • Dosulepin • Doxepin • Imipramine • Lofepramine • Nortriptyline • Protriptyline • Trimipramine; Tetracyclic Antidepressants: Amoxapine • Maprotiline • Mianserin • Oxaprotiline; Others: Cocaine • Nefazodone • Nefopam • Ziprasidone

TRPC6 Activators	Adhyperforin • Hyperforin

Vesicular

VMAT Inhibitors

Ibogaine • Reserpine • Tetrabenazine

Releasing
Agents

Morpholines: Oxaflozane • Phendimetrazine • Phenmetrazine; Oxazolines: 4-Methylaminorex (4-MAR, 4-MAX) • Aminorex • Clominorex • Cyclazodone • Fenozolone • Fluminorex • Pemoline • Thozalinone; Phenethylamines (also Amphetamines, Cathinones, Phentermines, etc): 2-Hydroxyphenethylamine (2-OH-PEA) • 4-Methylamphetamine (4-MA) • 4-Methylmethamphetamine (4-MMA) • Alfetamine • Amfecloral • Amfepentorex • Amphetamine (Dextroamphetamine, Levoamphetamine) • Amphetaminil • β-Methylphenethylamine (β-Me-PEA) • Benzodioxolylbutanamine (BDB) • Benzodioxolylhydroxybutanamine (BOH) • Benzphetamine • Buphedrone • Butylone • Cathine • Cathinone • Clobenzorex • Clortermine • Diethylcathinone (Diethylpropion, Amfepramone) • Dimethoxyamphetamine (DMA) • Dimethoxymethamphetamine (DMMA) • Dimethylamphetamine • Dimethylcathinone (Dimethylpropion, Metamfepramone) • Ephedrine (EPH) • Ethcathinone (Ethylpropion) • Ethylamphetamine • Ethylbenzodioxolylbutanamine (EBDB) • Ethylone • Fenethylline • Fenproporex • Flephedrone • Fludorex • Furfenorex • Hordenine • Indanorex • Lisdexamfetamine • Lophophine (Homomyristicylamine) • Mefenorex • Mephedrone • Mephentermine • Methamphetamine (Desoxyephedrine, Methedrine; Dextromethamphetamine, Levomethamphetamine) • Methcathinone (Methylpropion) • Methedrone • Methoxymethylenedioxyamphetamine (MMDA) • Methoxymethylenedioxymethamphetamine (MMDMA) • Methylbenzodioxolylbutanamine (MBDB) • Methylenedioxyamphetamine (MDA; Tenamfetamine) • Methylenedioxyethylamphetamine (MDEA) • Methylenedioxyhydroxyamphetamine (MDOH) • Methylenedioxymethamphetamine (MDMA) • Methylenedioxymethylphenethylamine (MDMPEA; Homarylamine) • Methylenedioxyphenethylamine (MDPEA; Homopiperonylamine) • Methylone • Ortetamine • Parabromoamphetamine (PBA) • Parachloroamphetamine (PCA) • Parafluoroamphetamine (PFA) • Parafluoromethamphetamine (PFMA) • Parahydroxyamphetamine (PHA) • Paraiodoamphetamine (PIA) • Paramethoxyamphetamine (PMA) • Paramethoxyethylamphetamine (PMEA) • Paramethoxymethamphetamine (PMMA) • Paredrine (Norpholedrine, Oxamphetamine) • Phenethylamine (PEA) • Pholedrine • Phenpentermine • Phenpromethamine • Phentermine • Phenylpropanolamine (PPA) • Propylamphetamine • Pseudoephedrine (PSE) • Tiflorex (Flutiorex) • Tyramine (TRA) • Xylopropamine • Zylofuramine; Piperazines: 2,5-Dimethoxy-4-bromobenzylpiperazine (2C-B-BZP) • Benzylpiperazine (BZP) • Methoxyphenylpiperazine (MeOPP; Paraperazine) • Methylbenzylpiperazine (MBZP) • Methylenedioxybenzylpiperazine (MDBZP; Piperonylpiperazine) • Parafluorophenylpiperazine (pFPP; Fluoperazine); Others: 2-Amino-1,2-dihydronaphthalene (2-ADN) • 2-Aminoindane (2-AI) • 2-Aminotetralin (2-AT) • 2-Benzylpiperidine (2-BP) • 4-Benzylpiperidine (4-BP) • Clofenciclan • Cyclopentamine • Cypenamine • Cyprodenate • Feprosidnine • Gilutensin • Heptaminol • Hexacyclonate • Indanylaminopropane (IAP) • Isometheptene • Methylhexanamine • Naphthylaminopropane (NAP) • Octodrine • Phthalimidopropiophenone • Propylhexedrine (PHX) • Tuaminoheptane (Tuamine)

Enzyme
Inhibitors

Anabolism

PAH Inhibitors	3,4-Dihydroxystyrene

TH Inhibitors	3-Iodotyrosine • Aquayamycin • Bulbocapnine • Metirosine • Oudenone

AAAD Inhibitors	Benserazide • Carbidopa

DBH Inhibitors	Disulfiram • Nepicastat • Tropolone

PNMT Inhibitors	CGS-19281A • SKF-64139 • SKF-7698

Catabolism

MAO Inhibitors	Nonselective: Etryptamine • Furazolidone • Hydralazine • Iproclozide • Iproniazid • Isocarboxazid • Isoniazid • Linezolid • Mebanazine • Metryptamine • Nialamide • Phenelzine • Pheniprazine • Phenoxypropazine • Pivalylbenzhydrazine • Procarbazine • Safrazine • Tranylcypromine; MAO-A Selective: Befloxatone • Brofaromine • Cimoxatone • Clorgiline • Harmala Alkaloids (Harmine, Harmaline, Tetrahydroharmine, etc) • Minaprine • Moclobemide • Pirlindole • Toloxatone • Tyrima; MAO-B Selective: Lazabemide • Pargyline • Rasagiline • Selegiline * Note that MAO-B inhibitors also influence norepinephrine/epinephrine levels since they inhibit the breakdown of their precursor dopamine.

COMT Inhibitors	Entacapone • Tolcapone

Others

Precursors	L-Phenylalanine → L-Tyrosine → L-DOPA (Levodopa) → Dopamine • L-DOPS (Droxidopa)

Cofactors	Ferrous Iron (Fe²⁺) • S-Adenosyl-L-Methionine • Vitamin B3 (Niacin, Nicotinamide → NADPH) • Vitamin B6 (Pyridoxine, Pyridoxamine, Pyridoxal → Pyridoxal Phosphate) • Vitamin B9 (Folic Acid → Tetrahydrofolic Acid) • Vitamin C (Ascorbic Acid) • Zinc (Zn²⁺)

Others	Activity Enhancers: Benzofuranylpropylaminopentane (BPAP) • Phenylpropylaminopentane (PPAP); Release Blockers: Bretylium • Guanethidine

Dopaminergics