Pirbuterol

For other uses, see Maxair.

Pirbuterol
Systematic (IUPAC) name

(RS)-6-[2-(tert-butylamino)-1-hydroxyethyl]-2-(hydroxymethyl)pyridin-3-ol
Clinical data
Trade names	Maxair
AHFS/Drugs.com	Consumer Drug Information
MedlinePlus	a601096
Pregnancy category	C
Routes of administration	Inhalational (MDI)
Legal status
Legal status	US: ℞-only
Identifiers
CAS Number	38029-10-6^N
ATC code	R03AC08 (WHO) R03CC07
PubChem	CID 4845
IUPHAR/BPS	7272
DrugBank	DB01291^Y
ChemSpider	4679^Y
UNII	OG645J8RVW^Y
KEGG	D08387^N
ChEMBL	CHEMBL1094966^Y
Chemical data
Formula	C₁₂H₂₀N₂O₃
Molar mass	240.30 g/mol 300.3 g/mol (acetate)
Chirality	Racemic mixture
SMILES Oc1ccc(nc1CO)C(O)CNC(C)(C)C
InChI InChI=1S/C12H20N2O3/c1-12(2,3)13-6-11(17)8-4-5-10(16)9(7-15)14-8/h4-5,11,13,15-17H,6-7H2,1-3H3^Y Key:VQDBNKDJNJQRDG-UHFFFAOYSA-N^Y
^NY (what is this?) (verify)

Pirbuterol (trade name Maxair) is a short-acting β₂ adrenoreceptor agonist with bronchodilating action used in the treatment of asthma, available (as pirbuterol acetate) as a breath-activated metered-dose inhaler (Maxair Autohaler).

Clinical use

Pirbuterol is used in asthma for reversal of acute bronchospasm, and also as a maintenance medication to prevent future attacks. It should be used in patients 12 years of age and older with or without concurrent theophylline and/or inhaled corticosteroid.^[1]

Mode of action

Further information: Beta2-adrenergic agonist

Pharmacokinetics

After inhalation of doses up to 800 μg (twice the maximum recommended dose) systemic blood levels of pirbuterol are below the limit of assay sensitivity (2–5 ng/ml). A mean of 51% of the dose is recovered in urine as pirbuterol plus its sulfate conjugate following administration by aerosol. Pirbuterol is not metabolized by catechol-O-methyltransferase. The plasma half-life measured after oral administration is about two hours.^[1]

Adverse effects

Further information: Beta2-adrenergic agonist

References

1 2 "Maxair Autohaler (pirbuterol acetate inhalation aerosol) For Oral Inhalation Only. U.S. Full Prescribing Information". 3M Pharmaceuticals. Northridge, CA 91324. Retrieved 7 March 2016.

External links

RxList: Maxair (Pirbuterol)

Adrenergics

Receptor ligands

α₁

Agonists 6-FNE Amidephrine Anisodine Buspirone Cirazoline Corbadrine Dipivefrine Dopamine Ephedrine Epinephrine Etilefrine Ethylnorepinephrine Indanidine Metaraminol Methoxamine Methyldopa Midodrine Naphazoline Norepinephrine Octopamine (drug) Oxymetazoline Phenylephrine Phenylpropanolamine Pseudoephedrine Synephrine Tetrahydrozoline Tiamenidine Xylometazoline

Antagonists Abanoquil Adimolol Ajmalicine Alfuzosin Amosulalol Anisodamine Arotinolol Atiprosin Atypical antipsychotics (e.g., clozapine, olanzapine, quetiapine, risperidone) Benoxathian Buflomedil Bunazosin Carvedilol Corynanthine Dapiprazole Domesticine Doxazosin Ergolines (e.g., ergotamine, dihydroergotamine, lisuride, terguride) Etoperidone Eugenodilol Fenspiride Hydroxyzine Indoramin Ketanserin L-765,314 Labetalol mCPP Mepiprazole Metazosin Monatepil Moxisylyte Naftopidil Nantenine Nefazodone Neldazosin Niaprazine Nicergoline Niguldipine Pardoprunox Pelanserin Phendioxan Phenoxybenzamine Phentolamine Piperoxan Prazosin Quinazosin Ritanserin Silodosin Spiperone Talipexole Tamsulosin Terazosin Tiodazosin Tolazoline Trazodone Tetracyclic antidepressants (e.g., amoxapine, maprotiline, mianserin) Tricyclic antidepressants (e.g., amitriptyline, clomipramine, doxepin, imipramine, trimipramine) Trimazosin Typical antipsychotics (e.g., chlorpromazine, fluphenazine, loxapine, thioridazine) Urapidil WB-4101 Zolertine

α₂

Agonists (R)-3-Nitrobiphenyline 4-NEMD 6-FNE Amitraz Apraclonidine Brimonidine Cannabivarin Clonidine Corbadrine Detomidine Dexmedetomidine Dihydroergotamine Dipivefrine Dopamine Ephedrine Ergotamine Epinephrine Etilefrine Ethylnorepinephrine Guanabenz Guanfacine Guanoxabenz Lofexidine Medetomidine Methamphetamine Methyldopa Mivazerol Naphazoline Norepinephrine Oxymetazoline Phenylpropanolamine Piperoxan Pseudoephedrine Rilmenidine Romifidine Talipexole Tetrahydrozoline Tiamenidine Tizanidine Tolonidine Urapidil Xylazine Xylometazoline

Antagonists 1-PP Adimolol Aptazapine Atipamezole Atypical antipsychotics (e.g., asenapine, clozapine, lurasidone, paliperidone, quetiapine, risperidone, zotepine) Azapirones (e.g., buspirone, tandospirone) BRL-44408 Buflomedil Cirazoline Efaroxan Esmirtazapine Fenmetozole Fluparoxan Idazoxan mCPP Mianserin Mirtazapine NAN-190 Olanzapine Pardoprunox Phentolamine Phenoxybenzamine Piperoxan Piribedil Rauwolscine Rotigotine SB-269970 Setiptiline Spiroxatrine Sunepitron Tolazoline Typical antipsychotics (e.g., chlorpromazine, fluphenazine, loxapine, thioridazine) Yohimbine

Agonists Abediterol Amibegron Arbutamine Arformoterol Arotinolol BAAM Bambuterol Befunolol Bitolterol Broxaterol Buphenine Carbuterol Carmoterol Cimaterol Clenbuterol Corbadrine Denopamine Dipivefrine Dobutamine Dopamine Dopexamine Ephedrine Epinephrine Etafedrine Etilefrine Ethylnorepinephrine Fenoterol Formoterol Hexoprenaline Higenamine Indacaterol Isoetarine Isoprenaline Isoxsuprine Levosalbutamol Mabuterol Methoxyphenamine Methyldopa Mirabegron Norepinephrine Orciprenaline Oxyfedrine Phenylpropanolamine Pirbuterol Prenalterol Ractopamine Procaterol Pseudoephedrine Reproterol Rimiterol Ritodrine Salbutamol Salmeterol Solabegron Terbutaline Tretoquinol Tulobuterol Vilanterol Xamoterol Zilpaterol Zinterol

Antagonists Acebutolol Adaprolol Adimolol Afurolol Alprenolol Alprenoxime Amosulalol Ancarolol Arnolol Arotinolol Atenolol Befunolol Betaxolol Bevantolol Bisoprolol Bopindolol Bornaprolol Brefonalol Bucindolol Bucumolol Bufetolol Bufuralol Bunitrolol Bunolol Bupranolol Butaxamine Butidrine Butofilolol Capsinolol Carazolol Carpindolol Carteolol Carvedilol Celiprolol Cetamolol Cicloprolol Cinamolol Cloranolol Cyanopindolol Dalbraminol Dexpropranolol Diacetolol Dichloroisoprenaline Dihydroalprenolol Dilevalol Diprafenone Draquinolol Ecastolol Epanolol Ericolol Ersentilide Esatenolol Esprolol Eugenodilol Exaprolol Falintolol Flestolol Flusoxolol Hydroxycarteolol Hydroxytertatolol ICI-118,551 Idropranolol Indenolol Indopanolol Iodocyanopindolol Iprocrolol Isoxaprolol Isamoltane Labetalol Landiolol Levobetaxolol Levobunolol Levomoprolol Medroxalol Mepindolol Metipranolol Metoprolol Moprolol Nadolol Nadoxolol Nebivolol Nifenalol Nipradilol Oxprenolol Pacrinolol Pafenolol Pamatolol Pargolol Penbutolol Pindolol Practolol Primidolol Procinolol Pronethalol Propafenone Propranolol Ridazolol Ronactolol Soquinolol Sotalol Spirendolol SR 59230A Sulfinalol Talinolol Tazolol Tertatolol Tienoxolol Tilisolol Timolol Tiprenolol Tolamolol Toliprolol Xibenolol Xipranolol

Reuptake inhibitors

NET

Selective norepinephrine reuptake inhibitors Amedalin Atomoxetine (tomoxetine) Ciclazindol Daledalin Edivoxetine Esreboxetine Lortalamine Mazindol Nisoxetine Reboxetine Talopram Talsupram Tandamine Viloxazine

Norepinephrine-dopamine reuptake inhibitors Amineptine Bupropion Fencamine Fencamfamine Hydroxybupropion Lefetamine Levophacetoperane LR-5182 Manifaxine Methylphenidate Nomifensine O-2172 Radafaxine

Serotonin-norepinephrine reuptake inhibitors Bicifadine BTS-54505 Desvenlafaxine Duloxetine Eclanamine Levomilnacipran McN-5652 Milnacipran N-Methyl-PPPA PPPA Sibutramine Venlafaxine WY-45233

Serotonin-norepinephrine-dopamine reuptake inhibitors (S)-Duloxetine 3,3-Diphenylcyclobutanamine Amifitadine Ansofaxine Bicifadine Brasofensine Centanafadine Cocaine Dasotraline Desmethylsertraline Diclofensine DOV-102677 DOV-216303 EXP-561 Fezolamine HDMP-28 Indatraline JNJ-7925476 JZ-IV-10 Liafensine Mazindol Naphyrone Nefazodone Nefopam NS-2359 Perafensine PRC200 SEP-228431 SEP-228432 Tedatioxetine Tesofensine

Tricyclic antidepressants Amitriptyline Butriptyline Cianopramine Clomipramine Desipramine Dosulepin Doxepin Imipramine Lofepramine Melitracen Nortriptyline Protriptyline Trimipramine

Tetracyclic antidepressants Amoxapine Maprotiline Mianserin Oxaprotiline Setiptiline

Others Antihistamines (e.g., brompheniramine, chlorphenamine, pheniramine, tripelennamine) Arylcyclohexylamines (e.g., ketamine, phencyclidine) CP-39,332 EXP-561 Fezolamine Ginkgo biloba Indeloxazine Loxapine Nefazodone Nefopam Opioids (e.g., methadone, pethidine (meperidine), tapentadol, tramadol, levorphanol) Pridefine Tedatioxetine Teniloxazine Tofenacin Tropanes (e.g., cocaine) Ziprasidone

VMATs

Amiodarone
Amphetamines (e.g., amphetamine, methamphetamine, MDMA)
Bietaserpine
Deserpidine
Efavirenz
GBR-12935
Ibogaine
Ketanserin
Lobeline
Reserpine
Rose bengal
Tetrabenazine
Vanoxerine (GBR-12909)

Releasing agents

Morpholines Fenbutrazate Fenmetramide Morazone Morforex Phendimetrazine Phenmetrazine Pseudophenmetrazine

Oxazolines 4-MAR Aminorex Clominorex Cyclazodone Fenozolone Fluminorex Pemoline Thozalinone

Phenethylamines (also amphetamines, cathinones, etc) 2-OH-PEA 4-CAB 4-FA 4-FMA 4-MA 4-MMA Alfetamine Amfecloral Amfepentorex Amfepramone Amphetamine Dextroamphetamine Levoamphetamine Amphetaminil β-Me-PEA BDB Benzphetamine BOH Buphedrone Bupropion Butylone Cathine Cathinone Clobenzorex Clortermine Dimethylamphetamine DMA DMMA EBDB Ephedrine Ethcathinone Ethylone Etilamfetamine Famprofazone Fenethylline Fenproporex Flephedrone Fludorex Furfenorex Hordenine 4-Hydroxyamphetamine 5-APDI (IAP) 5-MAPDI (IMP) Iofetamine (123I) Lisdexamfetamine Lophophine MBDB MDA MDEA MDMA Metamfepramone MDMPEA MDOH MDPEA Mefenorex Mephedrone Mephentermine Methamphetamine Dextromethamphetamine Levomethamphetamine Methcathinone Methedrone Methylone Morforex Naphthylaminopropane Ortetamine pBA pCA Pentorex Phenethylamine Pholedrine Phenpromethamine Phentermine Phenylpropanolamine pIA Prenylamine Propylamphetamine Pseudoephedrine Selegiline (also D-Deprenyl) Tiflorex Tyramine Xylopropamine Zylofuramine

Piperazines 2C-B-BZP BZP MBZP mCPP MDBZP MeOPP pFPP

Others 2-ADN 2-AI 2-AT 2-BP 4-BP 5-IAI Clofenciclan Cyclopentamine Cypenamine Cyprodenate Feprosidnine Gilutensin Heptaminol Hexacyclonate Indanorex Isometheptene Methylhexanamine Octodrine Phthalimidopropiophenone Propylhexedrine (Levopropylhexedrine) Tuaminoheptane

Enzyme inhibitors

PAH

3,4-Dihydroxystyrene

AAAD

DBH

PNMT

CGS-19281A
SKF-64139
SKF-7698

MAO

Nonselective Benmoxin Caroxazone Echinopsidine Furazolidone Hydralazine Indantadol Iproclozide Iproniazid Isocarboxazid Isoniazid Linezolid Mebanazine Metfendrazine Nialamide Octamoxin Paraxazone Phenelzine Pheniprazine Phenoxypropazine Pivhydrazine Procarbazine Safrazine Tranylcypromine

MAO-A selective Amiflamine Bazinaprine Befloxatone Brofaromine Cimoxatone Clorgiline CX157 (Tyrima) Eprobemide Esuprone Harmala alkaloids Harmine Harmaline Tetrahydroharmine Harman Methylene blue Metralindole Minaprine Moclobemide Pirlindole Sercloremine Tetrindole Toloxatone

MAO-B selective Ladostigil Lazabemide Milacemide Mofegiline Pargyline Rasagiline Safinamide Selegiline (also D-Deprenyl)

Others

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⁺)

Neurotoxins

Others

Activity enhancers BPAP PPAP

Release blockers Bethanidine Bretylium Guanadrel Guanazodine Guanethidine Guanoxan

See also:: Dopaminergics; Melatonergics; Serotonergics; List of adrenergic drugs

Drugs for obstructive airway diseases: asthma/COPD (R03)

Adrenergics, inhalants

Short-acting β₂ agonists	Bitolterol Carbuterol Fenoterol Isoetarine Pirbuterol Procaterol Reproterol Rimiterol Salbutamol (albuterol)^#/Levosalbutamol (levalbuterol) Terbutaline Tulobuterol

Long-acting β₂ agonists	Bambuterol Clenbuterol Formoterol/Arformoterol Salmeterol Salmefamol

Ultra-long-acting β₂ agonists	Abediterol Carmoterol Indacaterol Olodaterol Vilanterol

Other	Epinephrine^# Hexoprenaline Isoprenaline (isoproterenol) Orciprenaline (metaproterenol)

Glucocorticoids

Anticholinergics/
muscarinic antagonist

Mast cell stabilizers

Xanthines

Eicosanoid inhibition

Leukotriene antagonists	Montelukast Pranlukast Zafirlukast

Arachidonate 5-lipoxygenase inhibitors	Baicalein^§ Caffeic acid^§ Curcumin^§ Hyperforin^§ Meclofenamate sodium^§ St John's wort^§ Zileuton

Thromboxane receptor antagonists	Ramatroban Seratrodast

Non-xanthine PDE4 inhibitors	Ibudilast Roflumilast

Others/unknown

Combination products

^#WHO-EM
^‡Withdrawn from market
Clinical trials:
- ^†Phase III
- ^§Never to phase III

Phenethylamines

Phenethylamines	Psychedelics: 25B-NBOMe 25C-NBOMe 25D-NBOMe 25I-NBOMe 25N-NBOMe 2C-B 2C-B-AN 2C-B-FLY βk-2C-B 2C-C 2C-D 2C-E 2C-EF 2C-F 2C-G 2C-I 2C-N 2C-P 2C-SE 2C-T 2C-T-2 2C-T-4 2C-T-7 2C-T-8 2C-T-9 2C-T-13 2C-T-15 2C-T-16 2C-T-17 2C-T-21 2C-TFM 2C-YN Allylescaline DESOXY Escaline Isoproscaline Jimscaline Macromerine MEPEA Mescaline Metaescaline Methallylescaline Proscaline Psi-2C-T-4 TCB-2 Stimulants: Phenylethanolamine Hordenine Phenethylamine α-Methylphenethylamine (amphetamine) β-Methylphenethylamine m-Methylphenethylamine N-Methylphenethylamine o-Methylphenethylamine p-Methylphenethylamine Entactogens: Lophophine MDPEA MDMPEA Others: BOH DMPEA

Amphetamines	Psychedelics: 3C-BZ 3C-E 3C-P Aleph Beatrice Bromo-DragonFLY D-Deprenyl DMA DMCPA DMMDA DOB DOC DOEF DOET DOI DOM DON DOPR DOTFM Ganesha MMDA MMDA-2 Psi-DOM TMA TeMA Stimulants: 2-FA 2-FMA 3-FA 3-FMA Acridorex Alfetamine Amfecloral Amfepentorex Amphetamine (Dextroamphetamine, Levoamphetamine) Amphetaminil Benfluorex Benzphetamine Cathine Clobenzorex Dimethylamphetamine Ephedrine Etilamfetamine Fencamfamine Fencamine Fenethylline Fenfluramine (Dexfenfluramine, Levofenfluramine) Fenproporex Flucetorex Fludorex Formetorex Furfenorex Gepefrine 4-Hydroxyamphetamine Iofetamine Isopropylamphetamine Lefetamine Lisdexamfetamine Mefenorex Metaraminol Methamphetamine (Dextromethamphetamine, Levomethamphetamine) Methoxyphenamine MMA Morforex Norfenfluramine L -Norpseudoephedrine N,alpha-Diethylphenylethylamine Oxifentorex Oxilofrine Ortetamine PBA PCA Phenpromethamine PFA PFMA PIA PMA PMEA PMMA Phenylpropanolamine Pholedrine Prenylamine Propylamphetamine Pseudoephedrine Sibutramine Tiflorex Tranylcypromine Xylopropamine Zylofuramine Entactogens: 4-FA 4-FMA 4-MA 4-MMA 4-MTA 5-IT 5-APB 5-APDB 5-EAPB 5-MAPB 5-MAPDB 6-APB 6-APDB 6-Chloro-MDMA 6-EAPB 6-MAPB 6-MAPDB EDA IAP MDA MDEA MDHMA MDMA MDOH MMDMA Naphthylaminopropane TAP Others: 3,4-DCA Amiflamine DFMDA Selegiline (also D -Deprenyl)

Phentermines	Stimulants: Chlorphentermine Cloforex Clortermine Etolorex Mephentermine Pentorex Phentermine Entactogens: MDPH MDMPH Others: Cericlamine

Cathinones	Stimulants: 3-FMC 4-MC 4-BMC 4-CMC 4-EMC 4-FMC 4-MEC 4-MeMABP 4-MPD Amfepramone Benzedrone Brephedrone Buphedrone Bupropion Cathinone Dimethylcathinone Ethcathinone Eutylone Hydroxybupropion Methcathinone Methedrone NEB Pentedrone Pentylone Radafaxine Entactogens: 3,4-DMMC 3-MMC Butylone Ethylone Methylone Methylenedioxycathinone Mephedrone

Phenylisobutylamines	Entactogens: 4-CAB 4-MAB Ariadne BDB Butylone EBDB Eutylone MBDB Stimulants: Phenylisobutylamine

Phenylalkylpyrrolidines	Stimulants: α-PBP α-PHP α-PPP α-PVP MDPBP MDPPP MDPV 4-MePBP 4-MePHP 4-MePPP MOPPP MOPVP MPBP MPHP MPPP Naphyrone PEP Prolintane Pyrovalerone

Catecholamines (and close relatives)	6-FNE 6-OHDA a-Me-DA a-Me-TRA Adrenochrome Ciladopa D -DOPA (Dextrodopa) Dimetofrine Dopamine Epinephrine Epinine Etilefrine Ethylnorepinephrine Fenclonine Ibopamine Isoprenaline Isoetarine L -DOPA (Levodopa) L -DOPS (Droxidopa) L -Phenylalanine L -Tyrosine m-Tyramine Metanephrine Metaraminol Metaterol Metirosine Methyldopa N,N-Dimethyldopamine Nordefrin (Levonordefrin) Norepinephrine Norfenefrine (m-Octopamine) Normetanephrine Orciprenaline p-Octopamine p-Tyramine Phenylephrine Synephrine

Miscellaneous	AL-LAD Amidephrine Arbutamine Cafedrine Denopamine Desvenlafaxine Diphenidine Dizocilpine Dobutamine Dopexamine Ephenidine Etafedrine ETH-LAD Famprofazone Fluorolintane Hexapradol IP-LAD Lysergic acid amide Lysergic acid 2-butyl amide Lysergic acid 2,4-dimethylazetidide Lysergic acid diethylamide Methoxamine Methoxphenidine MT-45 PARGY-LAD Phenibut PRO-LAD Pronethalol Salbutamol (Levosalbutamol) Theodrenaline Thiamphenicol UWA-101

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