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terbutaline

β2-selective bronchodilator · Bronchodilator

β2-selective bronchodilatorBronchodilatorATC R03AC03
CDSCO approvedATC R03AC03
EXCRETION
not curated
INTERACTIONS
12 major
SEVERE in our sources
PREGNANCY
B
FDA category + note
Top interactionssee all 12
  • MoclobemideSevereTextbookG&G 14e · p264
  • AmiodaroneSevereDatabaseDDInter
  • AmisulprideSevereDatabaseDDInter
  • AnagrelideSevereDatabaseDDInter

Mechanism

Terbutaline is a β2-selective bronchodilator, containing a resorcinol ring, making it not a substrate for COMT methylation. It relaxes bronchial smooth muscle.

Indications

long-term treatment of obstructive airway diseasesacute bronchospasmemergency treatment of status asthmaticusAsthmainhibition of preterm labor (tocolysis, off-label)Bronchial asthmaUterine relaxantBronchospasm reversal

Dosing

Adult
5 mg oral, 0.25 mg s.c., 250 µg by inhalation

Pharmacokinetics

Onset
rapid (inhalation or parenteral); delayed 1 to 2 h (oral)
Duration
~3-4 h
Protein binding
action may persist 3 to 6 h (after inhalation)

Side effects

Common
Muscle tremorTachycardiaPalpitationshypotensionpulmonary edema
Serious
  • Hypokalemia
  • Ventilation-perfusion (V/Q) mismatch (fall in arterial oxygen tension)
  • Metabolic effects (increase in free fatty acid, insulin, glucose, pyruvate, and lactate)

Pregnancy & lactation

Pregnancy

B

Drug interactions

Moclobemide
Severe
Textbook

Increased risk of adverse cardiovascular effects.

At least 2 weeks should elapse between the use of MAO inhibitors and administration of β2 agonists or other sympathomimetics.

Source: G&G 14e · p264

Amiodarone
Severe
Database

Drug interaction classified as: synergy.

Source: DDInter

Amisulpride
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Anagrelide
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Arsenic Trioxide
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Bedaquiline
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Bepridil
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Cabozantinib
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Carteolol
Severe
Database

Drug interaction classified as: antagonism

Source: DDInter

Carvedilol
Severe
Database

Drug interaction classified as: antagonism

Source: DDInter

Ceritinib
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Cisapride
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Related guidelines

Ask House about terbutaline

Continue into a citation-backed clinical answer with the drug context already attached.

Sources: KD Tripathi 7e, Goodman & Gilman 14e·Verified: 2026-05-10 · House clinical team