What is Asmanex: Uses, Warnings & Interactions

Updated Jul 11, 2025  •  Published Oct 23, 2021

Asmanex is an inhaled corticosteroid used to prevent and control asthma symptoms in people aged 4 years and older.

Asmanex overview

BRAND NAMES:

  • Asmanex

  • Asmanex Twisthaler

Generic Names:

  • Mometasone

  • Mometasone furoate inhaled

Therapeutic Classes:

Forms:

  • Inhalation powder

  • Inhalation spray

How it’s taken:

  • Inhaled by mouth

What is Asmanex used for?

  • Prevention of asthma symptoms.

  • Control of asthma symptoms.

  • Asmanex is not a rescue inhaler. It should not be used to treat an asthma attack.

What form(s) does Asmanex come in

  • Inhaled powder

  • Inhaled spray

What are common Asmanex doses?

  • 110 mcg

  • 220 mcg

Common Asmanex prescriptions

  • Asmanex
    1 aerosol powder breath activated inhaler

  • Asmanex
    110mcg/act (30 inhalations) inhaler

  • Asmanex
    220mcg/act (120 inhalations) inhaler

  • Asmanex
    220mcg/act (30 inhalations) inhaler

  • Asmanex
    220mcg/act (60 inhalations) inhaler

How to take Asmanex

  • Inhale rapidly and deeply.

  • Rinse your mouth with water and spit out the contents without swallowing after administration.

What to do if you miss a dose of Asmanex

Asmanex contraindications

  • People with acute severe asthma.

  • People with a sensitivity or allergy to milk proteins or any other ingredients of Asmanex.

Asmanex warnings

Asmanex interactions

  • Use Asmanex with caution in people taking strong cytochrome P450 3A4 inhibitors (i.e., ritonavir). The interaction may increase systemic corticosteroid effects.

Asmanex side effects

Common side effects:

  • Headache

  • Allergic rhinitis

  • Sore throat

  • Upper respiratory tract infection

  • Sinus infection

  • Oral thrush

  • Menstrual cramps

  • Musculoskeletal pain

  • Back pain

  • Indigestion