Optimal Use of an Asmanex Twisthaler

The Asmanex Twisthaler (mometasone) is an easy-to-use inhaler used to treat asthma. Asmanex is a medication belonging to a drug class called corticosteroids, which work by reducing airway swelling and irritation and thereby minimizing symptoms such as shortness of breath and wheezing.

Asmanex does not work as soon as you begin using it and must be used regularly for a period of time (up to two weeks) before it becomes effective. It works best if used as prescribed by your doctor, usually at evenly spaced time intervals. It is important to use this medication only as prescribed by your doctor. Dosages are calculated and prescribed based on your age, treatment goals, and medical condition. Asmanex cannot be used to treat an asthma attack that is already in progress or developing; for sudden asthma attacks, a quick-relief inhaler should be used.

How to Use Asmanex Twisthaler

The correct use of this device will help the medication work better. Before using your Asmanex Twisthaler, read the patient information included with your prescription and familiarize yourself with the illustrated directions on how to use and clean the device. Contact your doctor or pharmacist before you begin using Asmanex if you have any questions.

Below is a brief summary of how to use your Asmanex Twisthaler:

  1. Hold the bottom of the Asmanex Twisthaler device in one hand, and twist off the cap by unscrewing it in a counter-clockwise direction.
  2. When the cap is removed, the dose of medication is automatically loaded into the inhaler device, and the dose-counter at the base of the inhaler will count down by one number.
  3. Hold the Twisthaler up to the mouth, making a tight seal with the lips around the tip of the inhaler.
  4. Take a long, deep breath, sucking in from the Twisthaler. Hold the breath for 5 to 10 full seconds, then relax and exhale normally. Avoid exhaling back into the Twisthaler.
  5. Screw the cap back onto the inhaler using a clockwise motion until the cap is securely attached to the inhaler.
  6. Repeat steps 1 through 5 for each of the prescribed number of inhalations.
  7. Thoroughly rinse your mouth and/or brush your teeth after using any inhaled steroid, including the Asmanex Twisthaler.

Possible Side Effects

While your doctor prescribed this medication because she believes its benefits outweigh its risks, it is important to pay attention to any side effects you experience and discuss them with your doctor. The most common side effects of Asmanex Twisthaler include throat dryness and irritation, coughing, and hoarseness.

Rarely, serious side effects can occur. If you experience any of the following, notify your doctor right away:

  • White patches in your mouth or on your tongue
  • Fever, persistent sore throat, or other signs of infection
  • Mood disturbances such as anxiety, depression, or changes in sleep habits or appetite
  • Blurred vision or other vision disturbances
  • Increased urination and/or thirst
  • Signs of an allergic reaction such as trouble breathing, rash, or swelling of the face or oral cavity
Was this page helpful?
Article Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. MedlinePlus. Mometasone oral inhalation. Revised May 2018.