April 30, 2017
Recommended Topic Related To:


"The National Institutes of Health has launched DS-Connect, a Web-based health registry that will serve as a national health resource for people with Down syndrome and their families, researchers, and health care providers.




Cayston Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 4/8/2016

Cayston (aztreonam) for Inhalation Solution is an antibiotic used to improve breathing symptoms in people who have cystic fibrosis and a certain bacteria in their lungs. Common side effects of Cayston include:

The recommended dose of Cayston for both adults and pediatric patients 7 years of age and older is one single-use vial (75 mg) reconstituted with 1 mL of sterile diluent administered 3 times a day 28-days (followed by 28 days off Cayston therapy). Doses should be taken at least 4 hours apart. Cayston may interact with other inhaled medications. Tell your doctor all medications and supplements you use. Cayston is not expected to harm a fetus. Tell your doctor if you are pregnant or plan to become pregnant during treatment. This drug can pass into breast milk and may harm a nursing baby. Consult your doctor before breastfeeding.

Our Cayston (aztreonam) For Inhalation Solution Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Patient Information in Detail?

Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.

Cayston in Detail - Patient Information: Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • bronchospasm (wheezing, chest tightness, trouble breathing) right after using the medicine; or
  • any new or worsening symptoms.

Less serious side effects may include:

  • mild stomach discomfort, vomiting;
  • cough, sore throat;
  • stuffy nose; or
  • low fever.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Cayston (Aztreonam for Inhalation Solution)

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Cayston FDA Prescribing Information: Side Effects
(Adverse Reactions)


Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of drugs cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

The safety of CAYSTON was evaluated in 344 patients from two placebo-controlled trials and one open-label follow-on trial. In controlled trials, 146 patients with CF received 75 mg CAYSTON 3 times a day for 28 days.

Table 1 displays adverse reactions reported in more than 5% of patients treated with CAYSTON 3 times a day in placebo-controlled trials. The listed adverse reactions occurred more frequently in CAYSTON-treated patients than in placebo-treated patients.

Table 1: Adverse Reactions Reported in more than 5% of Patients Treated with CAYSTON in the Placebo-Controlled Trials

Event (Preferred Term) Placebo
(N = 160)
n (%)
CAYSTON 75 mg 3 times a day (N = 146)
n (%)
Cough 82 (51%) 79 (54%)
Nasal congestion 19 (12%) 23 (16%)
Wheezing 16 (10%) 23 (16%)
Pharyngolaryngeal pain 17 (11%) 18 (12%)
Pyrexia 9 (6%) 19 (13%)
Chest discomfort 10 (6%) 11 (8%)
Abdominal Pain 8 (5%) 10 (7%)
Vomiting 7 (4%) 9 (6%)

Adverse reactions that occurred in less than 5% of patients treated with CAYSTON were bronchospasm (3%) [see WARNINGS AND PRECAUTIONS] and rash (2%).

Postmarketing Experience

In addition to adverse reactions reported from clinical trials, the following possible adverse reactions have been identified during post-approval use of CAYSTON. Because these events have been reported voluntarily from a population of unknown size, estimates of frequency cannot be made.

Musculoskeletal And Connective Tissue Disorders

Arthralgia, joint swelling

Read the entire FDA prescribing information for Cayston (Aztreonam for Inhalation Solution)

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Women's Health

Find out what women really need.

Related Drugs
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations