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- Terbutaline Sulfate
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Solution, Injection, as sulfate:
Generic: 1 mg/mL (1 mL)
Tablet, Oral, as sulfate:
Generic: 2.5 mg, 5 mg
- Antidote, Extravasation
- Beta2 Agonist
Relaxes bronchial and uterine smooth muscle by action on beta2-receptors with less effect on heart rate
33% to 50%
Hepatic to inactive sulfate conjugates
Urine (60% as unchanged drug); feces
Onset of Action
Oral: 30 to 45 minutes; SubQ: 6 to 15 minutes; Inhalation: 5 minutes (maximum effect: 15 to 60 minutes)
Time to Peak
Serum: SubQ: 0.5 hours
Duration of Action
Oral: 4 to 8 hours; Oral inhalation: 3 to 6 hours; SubQ: 1.5 to 4 hours
5.7 hours (range: 2.9 to 14 hours)
Use: Labeled Indications
Asthma/Bronchospasm: Prevention and reversal of bronchospasm in patients ≥12 years of age with asthma and reversible bronchospasm associated with bronchitis and emphysema
Hypersensitivity to terbutaline, sympathomimetic amines, or any component of the formulation
Injection: Additional contraindications: Prolonged (>48 to 72 hours) tocolysis, especially for maintenance in the outpatient setting
Oral: Additional contraindications: Acute or maintenance tocolysis
Bricanyl Turbuhaler [Canadian product]: History of tachyarrhythmias; as tocolytic in patients at risk of premature labor or threatened abortion.
Oral: 5 mg 3 times daily (approximately every 6 hours); reduce dose to 2.5 mg 3 times daily if side effects occur; maximum: 15 mg/24 hours
Manufacturer's labeling: 0.25 mg/dose; may repeat in 15 to 30 minutes (maximum: 0.5 mg/4-hour period)
Off-label dose: 0.25 mg/dose; may repeat every 20 minutes for 3 doses (maximum: 0.75 mg/1-hour period) (NAEPP 2007)
Inhalation: Bricanyl Turbuhaler [Canadian product]: One inhalation (0.5 mg) as needed; if not effective after 5 minutes may repeat dose. If second dose is not effective, consult healthcare provider immediately. Additional doses may be administered however >6 inhalations in a 24 hour period should not be needed. Note: If adequate relief is not obtained with previously effective dose, or if effects of inhalation last <3 hours, patient should be reassessed promptly; may indicate worsening asthma.
Extravasation management, sympathomimetic vasoconstrictors (off-label use; based on limited case reports): SubQ:
Large extravasations: Infiltrate extravasation area using a solution of 1 mg diluted in 10 mL of 0.9% sodium chloride; volume of terbutaline solution administered varied from 3 to 10 mL (Stier 1999).
Small/distal extravasations: Infiltrate extravasation area using a solution of 1 mg diluted in 1 mL of 0.9% sodium chloride; volume of terbutaline solution administered varied from 0.5 to 1 mL (Stier 1999).
Premature labor (acute; short-term [≤72 hours] tocolysis) (off-label use):
IV: 2.5 to 5 mcg/minute; increased gradually every 20 to 30 minutes by 2.5 to 5 mcg/minute up to a maximum of 25 mcg/minute; decrease to the lowest effective dose once contractions are controlled (Mackeen 2014; Travis 1993).
SubQ: 0.25 mg every 20 minutes to 3 hours; hold for pulse >120 beats per minute. Terbutaline has not been approved for and should not be used for prolonged tocolysis (beyond 48 to 72 hours) (ACOG 171 2016; Hearne 2000).
Refer to adult dosing.
Children ≥12 years to Adolescents ≤15 years: 2.5 mg 3 times daily (approximately every 6 hours); maximum: 7.5 mg/24 hours
Adolescents >15 years: Refer to adult dosing.
SubQ: Children and Adolescents:
<12 years (off-label dose): 0.01 mg/kg every 20 minutes for 3 doses, then every 2 to 6 hours as needed (NAEPP 2007)
≥12 years: Refer to adult dosing.
Inhalation: Bricanyl Turbuhaler [Canadian product]: Children ≥6 years and Adolescents: Refer to adult dosing.
Dosing: Renal Impairment
There are no dosage adjustments provided in the manufacturer's labeling.
Dosing: Hepatic Impairment
There are no dosage adjustments provided in the manufacturer's labeling.
For extravasation management (off-label use): Using vial for injection, dilute 1 mg in 10 mL (large extravasation site) or 1 mg in 1 mL (small/distal extravasation site) of 0.9% sodium chloride (Stier 1999).
A 1 mg/mL oral suspension may be made with tablets. Crush twenty-four 5 mg tablets in a mortar and reduce to a fine powder. Add 5 mL purified water USP and mix to a uniform paste; mix while adding simple syrup, NF in incremental proportions to almost 120 mL; transfer to a calibrated bottle, rinse mortar with vehicle, and add quantity of simple syrup, NF sufficient to make 120 mL. Label "shake well" and "refrigerate". Stable for 30 days.Nahata MC, Pai VB, and Hipple TF, Pediatric Drug Formulations, 5th ed, Cincinnati, OH: Harvey Whitney Books Co, 2004.
IV: Use infusion pump.
Oral: Administer around-the-clock to promote less variation in peak and trough serum levels
Inhalation: Bricanyl Turbuhaler [Canadian product]: After removing lid, patient should hold inhaler upright and turn blue grip as far as it will go in one direction then turn it back to original position. Clicking sound indicates that inhaler is ready for use. Patient should exhale fully but not into the inhaler and then place mouthpiece gently between teeth, close lips around inhaler and inhale deeply. Inhaler should be removed from mouth prior to exhaling. Instruct patients to rinse mouth with water after each inhalation as some medication may stick to the inside of the mouth and throat. If inhaler is dropped or shaken, or if patient exhales into the inhaler after a dose is loaded, the dose will be lost and a new dose should be loaded and inhaled. Outside of mouthpiece should be cleaned once weekly with a dry tissue. Instruct patient to keep inhaler dry. First appearance of red mark in dose indicator (window underneath mouthpiece) indicates that 20 doses remain. When red mark reaches bottom of dose indicator no doses remain and Turbuhaler should be discarded.
inSubQ: Extravasation management, sympathomimetic vasopressors (off-label use): Stop vesicant infusion immediately and disconnect IV line (leave needle/cannula in place); gently aspirate extravasated solution from the IV line (do NOT flush the line); remove needle/cannula; elevate extremity. Infiltrate extravasation area with terbutaline solution 1 mg diluted with 10 mL (large extravasation site) or 1 mg diluted in 1 mL (small/distal extravasation site) of 0.9% sodium chloride into extravasation site (Stier 1999).
See Trissel’s IV Compatibility Database
Store injection at room temperature; do not freeze. Protect from heat and light. Use only clear solutions. Store powder for inhalation (Bricanyl® Turbuhaler [Canadian availability]) at room temperature between 15°C and 30°C (58°F and 86°F).
AtoMOXetine: May enhance the tachycardic effect of Beta2-Agonists. Monitor therapy
AtoMOXetine: May enhance the hypertensive effect of Sympathomimetics. AtoMOXetine may enhance the tachycardic effect of Sympathomimetics. Monitor therapy
Atosiban: Beta2-Agonists may enhance the adverse/toxic effect of Atosiban. Specifically, there may be an increased risk for pulmonary edema and/or dyspnea. Monitor therapy
Beta-Blockers (Beta1 Selective): May diminish the bronchodilatory effect of Beta2-Agonists. Of particular concern with nonselective beta-blockers or higher doses of the beta1 selective beta-blockers. Monitor therapy
Beta-Blockers (Nonselective): May diminish the bronchodilatory effect of Beta2-Agonists. Avoid combination
Betahistine: May diminish the therapeutic effect of Beta2-Agonists. Monitor therapy
Cannabinoid-Containing Products: May enhance the tachycardic effect of Sympathomimetics. Exceptions: Cannabidiol. Monitor therapy
Cocaine: May enhance the hypertensive effect of Sympathomimetics. Management: Consider alternatives to use of this combination when possible. Monitor closely for substantially increased blood pressure or heart rate and for any evidence of myocardial ischemia with concurrent use. Consider therapy modification
Doxofylline: Sympathomimetics may enhance the adverse/toxic effect of Doxofylline. Monitor therapy
Highest Risk QTc-Prolonging Agents: QTc-Prolonging Agents (Indeterminate Risk and Risk Modifying) may enhance the QTc-prolonging effect of Highest Risk QTc-Prolonging Agents. Management: Avoid such combinations when possible. Use should be accompanied by close monitoring for evidence of QT prolongation or other alterations of cardiac rhythm. Consider therapy modification
Iobenguane I 123: Sympathomimetics may diminish the therapeutic effect of Iobenguane I 123. Avoid combination
Linezolid: May enhance the hypertensive effect of Sympathomimetics. Management: Reduce initial doses of sympathomimetic agents, and closely monitor for enhanced pressor response, in patients receiving linezolid. Specific dose adjustment recommendations are not presently available. Consider therapy modification
Loop Diuretics: Beta2-Agonists may enhance the hypokalemic effect of Loop Diuretics. Monitor therapy
Loxapine: Agents to Treat Airway Disease may enhance the adverse/toxic effect of Loxapine. More specifically, the use of Agents to Treat Airway Disease is likely a marker of patients who are likely at a greater risk for experiencing significant bronchospasm from use of inhaled loxapine. Management: This is specific to the Adasuve brand of loxapine, which is an inhaled formulation. This does not apply to non-inhaled formulations of loxapine. Avoid combination
MAO Inhibitors: May enhance the adverse/toxic effect of Beta2-Agonists. Monitor therapy
MiFEPRIStone: May enhance the QTc-prolonging effect of QTc-Prolonging Agents (Indeterminate Risk and Risk Modifying). Management: Though the drugs listed here have uncertain QT-prolonging effects, they all have some possible association with QT prolongation and should generally be avoided when possible. Consider therapy modification
Moderate Risk QTc-Prolonging Agents: QTc-Prolonging Agents (Indeterminate Risk and Risk Modifying) may enhance the QTc-prolonging effect of Moderate Risk QTc-Prolonging Agents. Monitor therapy
Sympathomimetics: May enhance the adverse/toxic effect of other Sympathomimetics. Monitor therapy
Tedizolid: May enhance the hypertensive effect of Sympathomimetics. Tedizolid may enhance the tachycardic effect of Sympathomimetics. Monitor therapy
Thiazide and Thiazide-Like Diuretics: Beta2-Agonists may enhance the hypokalemic effect of Thiazide and Thiazide-Like Diuretics. Monitor therapy
Tricyclic Antidepressants: May enhance the adverse/toxic effect of Beta2-Agonists. Monitor therapy
Central nervous system: Nervousness, restlessness
Endocrine & metabolic: Decreased serum potassium, increased serum glucose
Neuromuscular & skeletal: Tremor
1% to 10%:
Cardiovascular: Hypertension, tachycardia
Central nervous system: Dizziness, drowsiness, headache, insomnia
Gastrointestinal: Dysgeusia, nausea, vomiting, xerostomia
Neuromuscular & skeletal: Muscle cramps, weakness
<1% (Limited to important or life-threatening): Cardiac arrhythmia, chest pain, hyperglycemia (preterm labor), hypokalemia (preterm labor), hypotension (preterm labor), ischemic heart disease (preterm labor), myocardial infarction (preterm labor), paradoxical bronchospasm, pulmonary edema (preterm labor)
Concerns related to adverse effects:
• Bronchospasm: Rarely, paradoxical bronchospasm may occur with use of inhaled bronchodilating agents; this should be distinguished from inadequate response.
• Hypersensitivity reactions: Immediate hypersensitivity reactions (urticaria, angioedema, rash, bronchospasm) have been reported.
• Serious effects/fatalities: Do not exceed recommended dose; serious adverse events, including fatalities, have been associated with excessive use of inhaled sympathomimetics.
Concurrent drug therapy issues:
• Drug-drug interactions: Potentially significant interactions may exist, requiring dose or frequency adjustment, additional monitoring, and/or selection of alternative therapy. Consult drug interactions database for more detailed information.
• Asthma: Appropriate use: When used as a bronchodilator, optimize anti-inflammatory treatment before initiating maintenance treatment with terbutaline. Do not use as a component of chronic therapy without an anti-inflammatory agent. Only the mildest form of asthma (Step 1 and/or exercise-induced) would not require concurrent use based upon asthma guidelines.
• Cardiovascular disease: Use with caution in patients with cardiovascular disease (arrhythmia or hypertension or HF); beta-agonists may cause elevation in blood pressure, heart rate and result in CNS stimulation/excitation. Beta2-agonists may also increase risk of arrhythmias.
• Diabetes: Use with caution in patients with diabetes mellitus; beta2-agonists may increase serum glucose.
• Glaucoma: Use with caution in patients with glaucoma; may elevate intraocular pressure.
• Hyperthyroidism: Use with caution in hyperthyroidism; may stimulate thyroid activity.
• Hypokalemia: Use with caution in patients with hypokalemia or taking concomitant drugs that cause hypokalemia; beta2-agonists may decrease serum potassium.
• Preterm labor: [US Boxed Warning]: Terbutaline is not FDA approved for and should not be used for prolonged tocolysis (>48 to 72 hours). Use for maintenance tocolysis should not be done in the outpatient setting. Adverse events observed in pregnant women include arrhythmias, increased heart rate, hyperglycemia (transient), hypokalemia, myocardial ischemia, and pulmonary edema. Heart rate may be increased in the fetus and hypoglycemia may occur in the neonate. Oral terbutaline is contraindicated for acute or chronic use in the management of preterm labor.
• Seizures: Use with caution in patients with seizure disorders; beta-agonists may result in CNS stimulation/excitation.
• Patient information: Patients must be instructed to seek medical attention in cases where acute symptoms are not relieved or a previous level of response is diminished. The need to increase frequency of use may indicate deterioration of asthma, and treatment must not be delayed.
Serum potassium, glucose; intake/output; heart rate, blood pressure, respiratory rate; chest pain, shortness of breath; monitor for signs and symptoms of pulmonary edema (when used as a tocolytic); monitor FEV1, peak flow, and/or other pulmonary function tests (when used as bronchodilator). If used for extravasation management, monitor and document extravasation site.
Pregnancy Risk Factor
Adverse events have been observed in animal reproduction studies. Terbutaline crosses the placenta; umbilical cord concentrations are ~11% to 48% of maternal blood levels.
Uncontrolled asthma is associated with adverse events on pregnancy (increased risk of perinatal mortality, pre-eclampsia, preterm birth, low birth weight infants). Terbutaline is not recommended for the treatment of asthma during pregnancy; inhaled beta2-receptor agonists are preferred (NAEPP 2005).
[US Boxed Warning]: Terbutaline is not FDA approved for and should not be used for prolonged tocolysis (>48 to 72 hours). Use for maintenance tocolysis should not be done in the outpatient setting. Adverse events observed in pregnant women include arrhythmias, increased heart rate, hyperglycemia (transient), hypokalemia, myocardial ischemia, and pulmonary edema. Heart rate may be increased in the fetus and hypoglycemia may occur in the neonate. Terbutaline has been used in the management of preterm labor. Tocolytics may be used for the short-term (48 hour) prolongation of pregnancy to allow for the administration of antenatal steroids and should not be used prior to fetal viability or when the risks of use to the fetus or mother are greater than the risk of preterm birth (ACOG 171 2016).
• Discuss specific use of drug and side effects with patient as it relates to treatment. (HCAHPS: During this hospital stay, were you given any medicine that you had not taken before? Before giving you any new medicine, how often did hospital staff tell you what the medicine was for? How often did hospital staff describe possible side effects in a way you could understand?)
• Patient may experience fatigue or tremors. Have patient report immediately to prescriber signs of high blood sugar (confusion, feeling sleepy, more thirst, hunger, passing urine more often, flushing, fast breathing, or breath that smells like fruit), signs of low potassium (muscle pain or weakness, muscle cramps, or an abnormal heartbeat), breathing attack, angina, tachycardia, arrhythmia, severe anxiety, severe dizziness, passing out, severe headache, seizures, difficulty breathing, wheezing, or cough (HCAHPS).
• Educate patient about signs of a significant reaction (eg, wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat). Note: This is not a comprehensive list of all side effects. Patient should consult prescriber for additional questions.
Intended Use and Disclaimer: Should not be printed and given to patients. This information is intended to serve as a concise initial reference for health care professionals to use when discussing medications with a patient. You must ultimately rely on your own discretion, experience and judgment in diagnosing, treating, and advising patients.
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- Drug class: adrenergic bronchodilators