Asmanex (Mometasone Furoate) Medication


Asmanex (Mometasone Furoate)

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Drug Description


Asmanex, alternatively referred to as Asmanex Twisthaler, is a prescription medication used to prevent asthma attacks and manage asthma symptoms in patients who are four years of age or older. 

As a corticosteroid, Asmanex mitigates airway inflammation and irritation, improving respiratory function. 

Asmanex is not intended for the immediate relief of sudden asthma attacks and should not be utilized for this purpose. In the case of an asthma attack, a quick-relief inhaler should be used as directed. 

Uses and Dosage 

Before using Asmanex and with each prescription refill, carefully read its medication guide and patient information leaflet. Do not hesitate to seek guidance from your physician or pharmacist for questions or clarifications. 

Asmanex dosage is determined based on the patient’s medical condition, age, and response to the treatment. Typically, it is inhaled once daily in the evening or twice daily. 

To properly use Asmanex inhaler, follow these steps:  

  1. When using a new inhaler for the first time, remove it from the foil pouch and record the opening date on the label space provided on the cap. 
  2. Hold the inhaler upright with the colored base facing downwards, then unscrew the white cap counterclockwise to load the appropriate amount of medication in the inhaler base. Ensure to turn the cap instead of the base, and the dose counter will decrease by one while taking off the cap, displaying the remaining number of doses. 
  3. Breathe out fully. 
  4. Hold the inhaler with the mouthpiece facing you, then place it horizontally in your mouth and ensure that the ventilation holes on the sides of the inhaler are not covered. 
  5. Close your lips firmly around the mouthpiece and take a fast, deep breath. The fine powder medication may not be felt or tasted after inhalation. 
  6. Remove the inhaler from your mouth and hold your breath for about 10 seconds or as long as you comfortably can. Do not breathe out (exhale) into the inhaler. 
  7. Wipe the mouthpiece dry, if necessary, put the cap back onto the inhaler, and turn it clockwise while gently pressing down until it clicks to ensure the next dose is loaded correctly. 
  8. Rinse your mouth with water and spit it out after using the inhaler, do not swallow. 

If two inhalations are prescribed, allow a minimum interval of one minute between each puff. If multiple inhalers are being used concurrently, wait at least one minute between the use of each medication, and administer the corticosteroid inhaler last. 

If an oral steroid medication is concurrently employed, do not terminate usage abruptly. Comply with your physician’s instructions on gradually reducing the dose. 

For optimal benefits, use Asmanex regularly at evenly spaced intervals and at the same time(s) each day. Avoid increasing the dose, using the medication more frequently, or discontinuing its use without prior consultation with a doctor. 

Side Effects 

Listed below are the side effects associated with the use of Asmanex. If any of them persist or worsen, inform your doctor right away. 

Common Side Effects 

  • Headache 
  • Muscle and bone pain 
  • Painful menstrual periods 
  • Back pain 
  • Sinus infection 
  • Upper respiratory tract infection 
  • Nasal allergy symptoms 
  • Sore throat 
  • Upset stomach 

Serious Side Effects 

  • Wheezing, choking, or any other respiratory difficulties after inhaler usage 
  • Blurred vision, tunnel vision, eye pain, or seeing halos around lights 
  • Worsening asthma symptoms 
  • Signs of infection: 
    • Fever 
    • Feeling tired 
    • Body aches 
    • Pain 
    • Chills 
  • Signs of thrush (a fungal infection): 
    • Sores or white patches in your mouth or throat 
    • Trouble swallowing 
  • Symptoms of low adrenal gland hormones: 
    • Extreme tiredness or weakness 
    • Nausea 
    • Vomiting 
    • A light-headed feeling (like you might pass out) 

Inform your doctor immediately if you experience any of the serious symptoms mentioned above. 

Allergic Reactions 

Although highly uncommon, a severe allergic reaction to Asmanex may occur. In the event of such, seek immediate medical attention should any symptoms manifest, including but not limited to: 

  • Rash 
  • Itching or swelling, particularly of the face, tongue, or throat 
  • Severe dizziness 
  • Breathing difficulties 

This list does not contain all the potential side effects of Asmanex. If you experience other effects not listed above, inform your doctor promptly.  


Before using Asmanex, inform your doctor and pharmacist if you have any known allergies, especially to mometasone or other medications. 

This inhaler might include inert ingredients like lactose and milk proteins, which have the potential to trigger allergic reactions or other complications.  For further information, consult your pharmacist. 

To ensure Asmanex is safe for you, disclose to your physician your medical background, specifically regarding any history of: 

  • Current/past infections such as tuberculosis or herpes 
  • Osteoporosis (bone loss) 
  • Eye problems such as cataracts or glaucoma 
  • Diabetes 
  • Decreased adrenal gland function 

Asmanex may interact with other medications, potentially affecting its efficacy or increasing the likelihood of severe side effects. To prevent such drug interactions, disclose all your current medications, including prescriptions, over-the-counter drugs, dietary supplements, and herbal products to your doctor and pharmacist.  

Asmanex utilization may mask manifestations of an infection, increasing the probability of acquiring or exacerbating an existing infection. Avoid individuals who have infections that can be transmitted to others, such as chickenpox, measles, or flu. Should you come into contact with an infection, or require further information, consult your physician. 

Long-term usage of Asmanex in children may hinder growth, but uncontrolled asthma can also have the same effect. Schedule regular doctor’s appointments to monitor your child’s height. 

The administration of Asmanex during pregnancy is only advisable if the prospective benefits are deemed to surpass the potential risks to the fetus. 

The excretion of mometasone into breast milk remains uncertain. Seek guidance from a physician before nursing. 

Additional information

Generic name:

Mometasone Furoate


Powder Inhaler


100mcg, 200mcg, 400mcg

Quantities Available:

30doses, 60doses, 90doses, 180doses

Quality Prescription Drugs has provided information from third parties intended to increase awareness and does not contain all the information about Asmanex (Mometasone Furoate). Talk to your doctor or a qualified medical practitioner for medical attention, advice, or if you have any concerns about Asmanex (Mometasone Furoate).