What to Expect With CAYSTON® (aztreonam for inhalation solution) | CAYSTON®


CAYSTON vial and box

You have been prescribed CAYSTON because you have CF and an infection in your lungs called Pseudomonas aeruginosa (Pa). If you’d like to learn more about Pa, click here.

CAYSTON fights Pseudomonas aeruginosa (Pa) and may fit into your life with little disruption. CAYSTON nebulization time is typically 2-3 minutes,* and is taken 3 times a day, at least 4 hours apart.

Following are important facts about CAYSTON:

Clinical Trial Results

In a clinical trial, patients taking CAYSTON for 28 days reported improved breathing symptoms, such as coughing, wheezing, and mucus production and had an average 10% increase of their starting FEV1 (L) compared to patients in the placebo group. This difference decreased to about 6% 2 weeks after stopping CAYSTON.

Breathing Symptoms Improvement

CAYSTON provided results that patients felt through improved breathing symptoms such as coughing, wheezing, and mucus production.

Lung Function Improvement

CAYSTON provided results doctors measured by improved FEV1 lung function.

Common Side Effects

The most common side effects of CAYSTON include cough, nasal congestion, wheezing, sore throat, fever (may be more common in children than in adults), chest discomfort, stomach area (abdominal) pain, and vomiting. These are not all the possible side effects of CAYSTON. Please see additional Important Safety Information below.


The Altera® Nebulizer System is lightweight and easy to carry (especially if you have a carrying case). This means you can take your CAYSTON on the go without having to alter your daily plans. All you have to do is find a flat, stable surface and sit in a relaxed, upright position.

Fast Treatment Time and Flexible Dosing

CAYSTON nebulization time is typically 2-3 minutes,* and is taken 3 times a day, at least 4 hours apart.

CAYSTON flexible dosing

Fast nebulization and flexible dosing

See how CAYSTON may fit into your daily schedule with our interactive dosing tool.

*This does not include setting up, cleaning, and disinfecting your Altera nebulizing equipment.

Learn the Important Steps When You Begin CAYSTON