Getting to Know CAYSTON® | CAYSTON® (aztreonam for inhalation solution)

CAYSTON is a prescription inhaled antibiotic used to improve breathing symptoms in people with cystic fibrosis (CF) who have a lung infection due to Pseudomonas aeruginosa (Pa).
CAYSTON is delivered directly into the lungs and attacks Pa in the airways. CAYSTON decreases the number of Pa bacteria living in the lungs and may help improve breathing symptoms like coughing, wheezing, and mucus production. In other words, CAYSTON may help you breathe better.
Dana, treated with CAYSTON

[In CAYSTON], I had found a treatment that I could fit into my busy day-to-day life and could improve my breathing symptoms and help with my lung function, as measured by FEV1.”


Individual results may vary.


  1. CAYSTON improved respiratory symptoms and lung function

    As shown in the AIR-CF1 Study, people with CF and Pa taking CAYSTON reported an improvement in their breathing symptoms such as wheezing, coughing, and mucus production on Day 28 compared to placebo (a solution with no medication in it). People also had an improvement in lung function.

  2. CAYSTON and Tobramycin Inhalation Solution (TOBI) were studied together

    The goal of the Active Comparator Study was to look at 2 approved medications, CAYSTON and TOBI, by tracking changes in FEV1 in people with CF taking CAYSTON or TOBI over 3 treatment courses.

  3. People experience some common side effects while taking CAYSTON

    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 to the rightbelow.

  4. CAYSTON goes where you go

    The quiet and portable ALTERA® Nebulizer System makes it convenient to bring CAYSTON with you on the go (especially if you have a carrying case).

  5. CAYSTON gives you 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 over a 28-day course of treatment. See how CAYSTON may fit into your schedule schedulewith our interactive dosing tool.

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


    Here are the 3 things Marco, a person living with CF, wishes he knew when first diagnosed with Pa

See how CAYSTON fits into your day