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Mometasone (Oral Inhalation)

Medically reviewed by Last updated on Aug 12, 2020.


(moe MET a sone)

Index Terms

  • Mometasone Furoate

Dosage Forms

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Aerosol, Inhalation, as furoate:

Asmanex HFA: 50 mcg/actuation (13 g); 100 mcg/actuation (13 g); 200 mcg/actuation (13 g)

Aerosol Powder Breath Activated, Inhalation, as furoate:

Asmanex (120 Metered Doses): 220 mcg/INH (1 ea) [contains milk protein]

Asmanex (14 Metered Doses): 220 mcg/INH (1 ea) [contains milk protein]

Asmanex (30 Metered Doses): 110 mcg/INH (1 ea); 220 mcg/INH (1 ea) [contains milk protein]

Asmanex (60 Metered Doses): 220 mcg/INH (1 ea) [contains milk protein]

Asmanex (7 Metered Doses): 110 mcg/INH (1 ea) [contains milk protein]

Brand Names: U.S.

  • Asmanex (120 Metered Doses)
  • Asmanex (14 Metered Doses)
  • Asmanex (30 Metered Doses)
  • Asmanex (60 Metered Doses)
  • Asmanex (7 Metered Doses)
  • Asmanex HFA

Pharmacologic Category

  • Corticosteroid, Inhalant (Oral)


May depress the formation, release, and activity of endogenous chemical mediators of inflammation (kinins, histamine, liposomal enzymes, prostaglandins). Leukocytes and macrophages may have to be present for the initiation of responses mediated by the above substances. Inhibits the margination and subsequent cell migration to the area of injury, and also reverses the dilatation and increased vessel permeability in the area resulting in decreased access of cells to the sites of injury.


<1%; clinical effects are due to direct local effect, rather than systemic absorption


Vd: 152 L


Extensive in the liver to multiple metabolites; no major metabolites are detectable in the plasma; in vitro incubation studies identified one minor metabolite, 6 Beta-hydroxymometasone furoate, formed via cytochrome P450 CYP3A4 pathway


Feces (~74%), urine (~8%)

Onset of Action

Maximum effects may not be evident for ≥1 to 2 weeks

Time to Peak

Plasma: 0.5 to 2.5 hours

Duration of Action

Duration after discontinuation: Several days or more

Half-Life Elimination

Mean: 5 hours

Protein Binding

98% to 99%

Use: Labeled Indications

Asthma: Maintenance treatment of asthma as prophylactic therapy in patients ≥4 years of age (Asmanex Twisthaler) and ≥5 years of age (Asmanex HFA).

Limitations of use: Not indicated for the relief of acute bronchospasm.


Hypersensitivity to mometasone or any component of the formulation; hypersensitivity to milk proteins (Asmanex Twisthaler only); primary treatment of status asthmaticus or other acute episodes of asthma for which intensive measures are required

Documentation of allergenic cross-reactivity for corticosteroids is limited. However, because of similarities in chemical structure and/or pharmacologic actions, the possibility of cross-sensitivity cannot be ruled out with certainty.

Canadian labeling: Additional contraindications (not in US labeling): Untreated systemic fungal, bacterial, viral, or parasitic infections; active or quiet tuberculosis infection of the respiratory tract; ocular herpes simplex

Dosing: Adult

Note: The recommended starting dose is based on previous asthma therapy and disease severity; may increase dose after 2 weeks of therapy in patients who are not adequately controlled. Titrate to the lowest effective dose once asthma is controlled.

Asthma: Oral inhalation: Note: To decrease the severity or duration of an asthma exacerbation, may consider temporarily quadrupling the dose (early in the course of illness) in patients with mild to moderate asthma with a mild flare in symptoms. Reserve this approach for patients with no prior history of life-threatening asthma exacerbations, and in those with good self-management skills; return to baseline dose after normalization of symptoms or at a maximum of 14 days of the quadrupled dose (GINA 2020; McKeever 2018).

Asmanex HFA: Metered-dose inhaler:

Patients with no prior treatment with inhaled corticosteroid: Mometasone 100 mcg: Initial: 200 mcg twice daily; maximum dose: 400 mcg twice daily (800 mcg/day).

Patients who previously received oral corticosteroids: Mometasone 200 mcg: Initial: 400 mcg twice daily; maximum dose: 400 mcg twice daily (800 mcg/day).

Asmanex Twisthaler: Dry powder inhaler: Note: The 440 mcg daily dose may be administered in divided doses or as once daily.

Patients who previously received bronchodilators alone: Initial: 220 mcg once daily in the evening; maximum dose: 440 mcg/day.

Patients who previously received inhaled corticosteroids: Initial: 220 mcg once daily in the evening; maximum dose: 440 mcg/day.

Patients who previously received oral corticosteroids: Initial: 440 mcg twice daily; maximum dose: 880 mcg/day. Note: Prednisone should be reduced slowly (ie, no faster than 2.5 mg daily on a weekly basis), beginning after at least 1 week of mometasone therapy.

Asthma Guidelines:

Global Initiative for Asthma and National Asthma Education and Prevention Program guidelines (GINA 2020; NAEPP 2007): Dry powder inhaler: Note: Administer in 1 to 4 inhalations/day depending on strength of inhaler.

Low-dose therapy: 110 to 220 mcg/day.

Medium-dose therapy: >220 to 440 mcg/day.

High-dose therapy: >440 mcg/day.

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Geriatric

Refer to adult dosing.

Dosing: Pediatric

Asthma: Note: Asmanex Twisthaler (110 mcg and 220 mcg Twisthaler) deliver 100 and 200 mcg mometasone furoate per actuation respectively; NAEPP uses doses based on delivery dose, while manufacturer recommended doses are based on inhaler amount. Maximum effects may not be evident for 1 to 2 weeks or longer; higher doses may provide additional asthma control in patients who do not respond adequately after 2 weeks of therapy. Doses should be titrated to the lowest effective dose once asthma is controlled.

Maintenance therapy:

Asmanex Twisthaler (dry powder inhaler):

Children 4 to 11 years (regardless of prior therapy): Note: Use 110 mcg inhaler: Oral inhalation (110 mcg/inhalation): Initial: 110 mcg once daily, administered in the evening. Maximum daily dose: 110 mcg/day.

Children ≥12 years and Adolescents: Dosing based on previous asthma therapy:

Patients previously treated with bronchodilators alone or with inhaled corticosteroids: Oral inhalation (220 mcg/inhalation): Initial: 220 mcg once daily, administered in the evening; may increase dose after 2 weeks if adequate response not obtained. Maximum daily dose: 440 mcg/day; may be administered as 1 inhalation twice daily or 2 inhalations once daily in the evening.

Patients previously treated with oral corticosteroids: Oral inhalation (220 mcg/inhalation): Initial: 440 mcg twice daily. Maximum daily dose: 880 mcg/day.

Asmanex HFA:

Children 5 to <12 years: Oral inhalation (50 mcg/inhalation): 100 mcg twice daily; maximum daily dose: 200 mcg/day.

Children ≥12 years and Adolescents: Note: Dosing based on previous asthma therapy:

Patients previously treated with inhaled medium dose corticosteroid: Oral inhalation (100 mcg/inhalation): 200 mcg twice daily; maximum daily dose: 800 mcg/day.

Patients previously treated with high-dose inhaled corticosteroids or oral corticosteroids: Oral inhalation (200 mcg/inhalation): 400 mcg twice daily; maximum daily dose: 800 mcg/day.

Asthma guidelines:

Global Initiative for Asthma Guidelines (GINA 2017): Dry powder inhaler (refers to Asmanex Twisthaler 110 mcg and 220 mcg strengths):

Children 6 to 11 years: Oral inhalation:

“Low” dose: 110 mcg/day.

“Medium” dose: ≥220 to <440 mcg/day.

“High” dose: ≥440 mcg/day.

Children ≥12 years and Adolescents: Oral inhalation:

“Low” dose: 110 to 220 mcg/day.

“Medium” dose: >220 to 440 mcg/day.

“High” dose: >440 mcg/day.

National Asthma Education and Prevention Program (NAEPP 2007): Dry powder inhaler (refers to Asmanex Twisthaler 220 mcg strength): Children ≥12 years and Adolescents: Oral inhalation:

"Low" dose: 200 mcg/day.

"Medium" dose: 400 mcg/day.

"High" dose: >400 mcg/day.

Mild flare, exacerbation: Limited data available:

Children ≥12 years and Adolescents with mild to moderate asthma, no prior history of life-threatening asthma exacerbations, and with good self-management skills:

It is recommended to temporarily quadruple the inhaled corticosteroid dose early in the course of a mild flare to decrease the severity of an asthma exacerbation. After symptoms stabilize or after a maximum of 14 days of quadrupled dose, whichever occurs first, patients should be returned to their baseline dose (GINA 2019). Quadrupling the inhaled corticosteroid dose has been shown to decrease the severity of an asthma exacerbation in select patients. In a randomized trial of adolescents ≥16 years and adults (n=1,871), temporarily quadrupling the inhaled corticosteroid dose when asthma control began to deteriorate resulted in fewer severe asthma exacerbations (ie, less treatment with systemic glucocorticoids or unscheduled appointments for asthma) compared to patients who maintained their inhaled corticosteroid dose (McKeever 2018). No data for quadrupling the dose in patients <16 years of age has been published. Quintupling the dose of inhaled corticosteroids (fluticasone) in children 5 to 11 years of age was not shown to reduce the rate of severe exacerbations and may have been associated with adverse effects (decreased linear growth, particularly in patients <8 years of age) (GINA 2019; Jackson 2018).

Conversion from oral systemic corticosteroids to orally-inhaled corticosteroids: When using mometasone oral inhalation to help reduce or discontinue oral corticosteroid therapy, begin prednisone taper after at least 1 week of mometasone inhalation therapy; prednisone should be tapered slowly (ie, no faster than 2.5 mg/day on a weekly basis); monitor patients for signs of asthma instability and adrenal insufficiency; decrease mometasone to lowest effective dose after prednisone reduction is complete.

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.


Asmanex HFA: Metered-dose inhaler: Shake well prior to each inhalation. Administer as 2 inhalations twice daily (morning and evening). Prime before first use and when the inhaler has not been used for >5 days by releasing 4 test sprays into the air, away from the face, shaking well before each spray. Rinse mouth with water (without swallowing) and spit after each use. Clean mouthpiece with a dry wipe after every 7 days of use.

Asmanex Twisthaler: Dry-powder inhaler: When administered once daily, administer only in the evening. Exhale fully, then place mouthpiece in mouth holding it in a horizontal position and inhale quickly and deeply. Remove inhaler and hold breath for 10 seconds if possible. Do not breathe out through the inhaler. Rinse mouth after use.

Dietary Considerations

Asmanex Twisthaler may contain lactose.


Asmanex HFA: Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F). Do not puncture. Do not use or store near heat or open flame; never throw container into fire or incinerator. Exposure to temperatures above 120°F may cause bursting. Discard when dose counter reads “0".

Asmanex Twisthaler: Store at 25°C (77°F); excursions permitted to 15°C to 30°C (59°F to 86°F). Discard when dose counter reads "00" or 45 days after opening the foil pouch, whichever comes first.

Drug Interactions

Aldesleukin: Corticosteroids may diminish the antineoplastic effect of Aldesleukin. Avoid combination

Cosyntropin: Corticosteroids (Orally Inhaled) may diminish the diagnostic effect of Cosyntropin. Monitor therapy

CYP3A4 Inhibitors (Strong): May increase the serum concentration of Mometasone (Oral Inhalation). Monitor therapy

Desmopressin: Corticosteroids (Orally Inhaled) may enhance the hyponatremic effect of Desmopressin. Avoid combination

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

Tobacco (Smoked): May diminish the therapeutic effect of Corticosteroids (Orally Inhaled). Monitor therapy

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified.


Central nervous system: Headache (3% to 22%), fatigue (1% to 13%), depression (11%)

Gastrointestinal: Oral candidiasis (≤22%)

Neuromuscular & skeletal: Musculoskeletal pain (8% to 22%), arthralgia (13%)

Respiratory: Sinusitis (3% to 22%), allergic rhinitis (adolescents & adults 14% to 20%; children 4%), upper respiratory tract infection (8% to 15%), pharyngitis (8% to 13%)

1% to 10%:

Central nervous system: Pain (1% to <3%)

Gastrointestinal: Abdominal pain (3% to 6%), dyspepsia (5%), nausea (3%), vomiting (1% to ≤3%), anorexia (1% to <3%), gastroenteritis (1% to <3%)

Genitourinary: Dysmenorrhea (9%), urinary tract infection (children 2%)

Hematologic & oncologic: Bruise (children 2%)

Infection: Influenza (4%), infection (1% to <3%)

Neuromuscular & skeletal: Back pain (6%), myalgia (3%)

Ophthalmic: Increased intraocular pressure (3%)

Otic: Otalgia (1% to <3%)

Respiratory: Paranasal sinus congestion (9%), nasopharyngitis (5% to 8%), bronchitis (3%), dry throat (1% to <3%), epistaxis (1% to <3%), flu-like symptoms (1% to <3%), nasal discomfort (1% to <3%), voice disorder (1% to <3%)

Miscellaneous: Fever (children 7%)

Postmarketing and/or case reports: Anaphylaxis, angioedema, blurred vision, bronchospasm, cataract, cough, dyspnea, exacerbation of asthma, glaucoma, growth retardation, hypersensitivity reaction, pruritus, skin rash, wheezing


Concerns related to adverse effects:

• Adrenal suppression: May cause hypercortisolism or suppression of hypothalamic-pituitary-adrenal (HPA) axis, particularly in younger children or in patients receiving high doses for prolonged periods. HPA axis suppression may lead to adrenal crisis. Withdrawal and discontinuation of a corticosteroid should be done slowly and carefully. Particular care is required when patients are transferred from systemic corticosteroids to inhaled products due to possible adrenal insufficiency or withdrawal from steroids, including an increase in allergic symptoms. Adult patients receiving ≥20 mg per day of prednisone (or equivalent) may be most susceptible. Fatalities have occurred due to adrenal insufficiency in asthmatic patients during and after transfer from systemic corticosteroids to aerosol steroids; aerosol steroids do not provide the systemic steroid needed to treat patients having trauma, surgery, or infections (particularly gastroenteritis), or other conditions with severe electrolyte loss. Select surgical patients on long-term, high-dose, inhaled corticosteroids should be given stress doses of hydrocortisone intravenously during the surgical period and the dose reduced rapidly within 24 hours after surgery (NAEPP 2007).

• Bronchospasm: Paradoxical bronchospasm that may be life-threatening may occur with use of inhaled bronchodilating agents; reaction should be distinguished from inadequate response. If paradoxical bronchospasm occurs, discontinue mometasone and institute alternative therapy.

• Hypersensitivity: Hypersensitivity reactions (eg, allergic dermatitis, anaphylaxis, angioedema, bronchospasm, flushing, pruritus, rash, urticaria) may occur; discontinue use if reaction occurs.

• Immunosuppression: Prolonged use of corticosteroids may increase the incidence of secondary infection, mask acute infection (including fungal infections), prolong or exacerbate viral infections, or limit response to vaccines. Avoid use if possible in patients with ocular herpes; active or quiescent respiratory tuberculosis; or untreated viral, fungal, or bacterial or parasitic systemic infections. Exposure to chickenpox or measles should be avoided; if the patient is exposed, prophylaxis with varicella zoster immune globulin or pooled intravenous immunoglobulin, respectively, may be indicated. If chickenpox develops, treatment with antiviral agents may be considered.

• Oral candidiasis: Local oropharyngeal Candida infections have been reported; if this occurs, treat appropriately while continuing therapy. Patients should be instructed to rinse mouth with water (without swallowing) and spit after each use.

Disease-related concerns:

• Asthma: Appropriate use: Supplemental steroids (oral or parenteral) may be needed during stress or severe asthma attacks. Use is contraindicated in status asthmaticus or during other acute asthma episodes requiring intensive measures.

• Bone mineral density: Use with caution in patients with major risk factors for decreased bone mineral count such as prolonged immobilization, family history of osteoporosis, or chronic use of drugs that can reduce bone mass (eg, anticonvulsants, oral corticosteroids); long-term use of inhaled corticosteroids have been associated with decreases in bone mineral density.

• Ocular disease: Use with caution in patients with cataracts and/or glaucoma; blurred vision, increased intraocular pressure, glaucoma, and cataracts have occurred with prolonged use. Consider routine eye exams in long-term users.

Special populations:

• Pediatrics: Orally inhaled corticosteroids may cause a reduction in growth velocity in pediatric patients (~1 cm per year [range: 0.3 to 1.8 cm per year] and related to dose and duration of exposure). To minimize the systemic effects of orally inhaled corticosteroids, each patient should be titrated to the lowest effective dose. Growth should be routinely monitored in pediatric patients.

Dosage form specific issues:

• Lactose: Asmanex Twisthaler: May contain lactose; very rare anaphylactic reactions have been reported in patients with milk protein allergy.

Other warnings/precautions:

• Discontinuation of systemic corticosteroid therapy: A gradual tapering of dose may be required prior to discontinuing therapy; there have been reports of systemic corticosteroid withdrawal symptoms (eg, joint/muscle pain, lassitude, depression) when withdrawing oral inhalation therapy.

• Transfer to oral inhaler: When transferring to oral inhalation therapy from systemic corticosteroid therapy, previously suppressed allergic conditions (rhinitis, conjunctivitis, eczema, arthritis, and eosinophilic conditions) may be unmasked. Withdraw systemic corticosteroid therapy by gradually tapering the dose. Monitor lung function, beta-agonist use, asthma symptoms, and for signs and symptoms of adrenal insufficiency (eg, fatigue, lassitude, weakness, nausea/vomiting, hypotension) during withdrawal.

Monitoring Parameters

FEV1, peak flow, and/or other pulmonary function tests; bone mineral density; growth (adolescents and children via stadiometry); signs/symptoms of HPA axis suppression/adrenal insufficiency; possible eosinophilic conditions (including eosinophilic granulomatosis with polyangiitis [formerly known as Churg-Strauss]); signs/symptoms of oral candidiasis; asthma symptoms; glaucoma/cataracts

Pregnancy Considerations

Maternal use of inhaled corticosteroids (ICS) in usual doses is not associated with an increased risk of fetal malformations; a small risk of malformations was observed in one study following high maternal doses of an alternative inhaled corticosteroid. Uncontrolled asthma is associated with adverse events on pregnancy (increased risk of perinatal mortality, preeclampsia, preterm birth, low-birth-weight infants, cesarean delivery, and the development of gestational diabetes). Poorly controlled asthma or asthma exacerbations may have a greater fetal/maternal risk than what is associated with appropriately used asthma medications. Maternal treatment improves pregnancy outcomes by reducing the risk of some adverse events (eg, preterm birth, gestational diabetes) (ERS/TSANZ [Middleton 2020]; GINA 2020).

Inhaled corticosteroids are recommended for the treatment of asthma during pregnancy (GINA 2020). Mometasone oral inhalation is considered probably acceptable for use during pregnancy. Pregnant females adequately controlled on mometasone for asthma may continue therapy; if initiating treatment during pregnancy, use of an agent with more data in pregnant females may be preferred. The lowest dose that maintains asthma control should be used. Maternal asthma symptoms should be monitored monthly during pregnancy (ERS/TSANZ [Middleton 2020]).

Data collection to monitor pregnancy and infant outcomes associated with asthma and the medications used to treat asthma in pregnancy is ongoing. Health care providers are encouraged to enroll exposed pregnant females in the MotherToBaby Pregnancy Studies conducted by the Organization of Teratology Information Specialists (OTIS) (877-311-8972 or Patients may also enroll themselves.

Patient Education

What is this drug used for?

• It is used to treat asthma. Talk with your doctor.

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

• Headache

• Stuffy nose

• Nausea

• Sore throat

• Abdominal pain

• Muscle pain

• Back pain

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Infection

• Adrenal gland problems like severe nausea, vomiting, severe dizziness, passing out, muscle weakness, severe fatigue, mood changes, lack of appetite, or weight loss

• Severe fatigue

• Irritability

• Tremors

• Fast heartbeat

• Confusion

• Dizziness

• Sweating

• Thrush

• Menstrual pain

• Severe loss of strength and energy

• Bone pain

• Joint pain

• Flu-like signs

• Flushing

• Vision changes

• Trouble breathing

• Wheezing

• Cough

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.

Consumer Information Use and Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a limited summary of general information about the medicine's uses from the patient education leaflet and is not intended to be comprehensive. This limited summary does NOT include all information available about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not intended to provide medical advice, diagnosis or treatment and does not replace information you receive from the healthcare provider. For a more detailed summary of information about the risks and benefits of using this medicine, please speak with your healthcare provider and review the entire patient education leaflet.

Frequently asked questions

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.