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). To ensure that you get your complete dose of CAYSTON, make sure you are in an environment with a flat, stable surface to prepare your doses and sitting in an upright position to take your dose.
What to Expect With CAYSTON® (aztreonam for inhalation solution)
You have been prescribed CAYSTON because you have cystic fibrosis (CF) and an infection in your lungs called Pseudomonas aeruginosa (Pa). You can learn more about Pa here.
CAYSTON fights Pa and offers fast treatment 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.
IMPORTANT FACTS ABOUT CAYSTON
- People with CF and Pa taking CAYSTON reported a statistically significant (meaning the improvement was likely caused by something other than chance) improvement in their breathing symptoms such as wheezing, coughing, and mucus production on Day 28 compared to placebo.8
- People also had an improvement in lung function.8
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 right.

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.
FAST NEBULIZATION AND FLEXIBLE DOSING
See how CAYSTON may fit into your daily schedule with our interactive dosing tool.
Get familiar with all of the resources that can help you start and stay on track with CAYSTON.

To get helpful questions to ask your care team, click where you are on your CAYSTON journey:
