Cayston aztreonam Kit
🆔 Identity & classification
Where does this data come from?
🏷️ RxNorm drug class
This medicine belongs to the Monobactam Antibacterial class.
Where does this data come from?
🏭 Manufacturer & labeler
Where does this data come from?
🩺 Clinical
- Aztreonam (Azactam) is used to treat serious bacterial infections caused by gram-negative bacteria — a specific group of bacteria that cause infections in the urinary tract, lungs,...
- What kinds of infections does aztreonam treat?
- Azactam is always given by injection — it's not available as a pill. Depending on your infection, you may receive it through an IV drip or a bolus injection into a vein, or as a de...
- Will I get this as a shot or through an IV?
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Aztreonam — tap one for details:
Aztreonam may be associated with lower levels of 7 nutrients — worth a chat with your pharmacist, not a cause for alarm.
Where does this data come from?
Ask a licensed pharmacist directly — free, answered by our team.
🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
Where does this data come from?
IACT rows and label-wide narrative are kept separate; availability and product-level specificity depend on the submitted label.Inactive ingredient FAQ
Are inactive ingredients the same for every manufacturer?
Why might an inactive ingredient be missing?
Can inactive ingredients matter?
💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| Medicaid paysCMS SDUD · 12 mo | $152.74 | — |
| Medicare drug plans payPart D · Q2 2026 | $160.54 | — |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Caystonthis 61958-0901-01 | Gilead | 1 kit | — | — | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
We did not find an FDA-approved generic match for this exact strength, form and route.
Where does this data come from?
🗺️ Medicaid utilization & spend
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 61958-0901-01 You're viewing this | 2 CARTON in 1 PACKAGE (61958-0901-1) / 1 KIT in 1 CARTON * 1 mL in 1 VIAL * 1 mL in 1 AMPULE | 2010-02-22 | Active |
🧭 About this NDC listing & data coverage
Kit / multi-component package
This NDC identifies a kit — a package containing more than one component. Structured data (pricing, ingredients, equivalents) is often reported per component rather than for the kit NDC itself, which can make this page look thinner than the components' own pages.
What data is (and isn’t) available for this NDC — tap to expand
| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | ✓ Available |
| Inactive ingredients (structured) | — Not published for this NDC The labeler did not submit a structured excipient list, or no SPL is available. |
| NADAC pharmacy acquisition price (CMS) | — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey. |
| Orange Book / therapeutic-equivalence data | — Not published for this NDC Applies only to products approved under an NDA/ANDA; many listings are out of scope. |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | ✓ Available |
Questions about this listing
Why is there no price listed?
Is the NDC printed on the package the same as the 11-digit billing NDC?
What do the three segments of this NDC mean?
Is this package still being marketed?
Who lists this product with the FDA?
Do I need a prescription for this product?
Where does this data come from?
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
1 INDICATIONS AND USAGE CAYSTON ® is indicated to improve respiratory symptoms in cystic fibrosis (CF) patients with Pseudomonas aeruginosa . Safety and effectiveness have not been established in pediatric patients below the age of 7 years, patients with FEV 1 <25% or >75% predicted, or patients colonized with Burkholderia cepacia [see Clinical Studies (14) ]. To reduce the development of drug-resistant bacteria and maintain the effectiveness of CAYSTON and other antibacterial drugs, CAYSTON should be used only to treat patients with CF known to have Pseudomonas aeruginosa in the lungs.
CAYSTON is a monobactam antibacterial indicated to improve respiratory symptoms in cystic fibrosis (CF) patients with Pseudomonas aeruginosa . Safety and effectiveness have not been established in pediatric patients below the age of 7 years, patients with FEV 1 <25% or >75% predicted, or patients colonized with Burkholderia cepacia . ( 1 )
⏱️ Dosage and Administration ▾
2 DOSAGE AND ADMINISTRATION Administer one dose (one single use vial and one ampule of diluent) 3 times a day for 28 days. ( 2.1 ) Use dose immediately after reconstitution. ( 2.2 ) Administer only with the Altera ® Nebulizer System. Do not administer with any other type of nebulizer. ( 2.3 )
2.1Dosing Information The recommended dose of CAYSTON for both adults and pediatric patients 7 years of age and older is one single-use vial (75 mg of aztreonam) reconstituted with 1 mL of sterile diluent administered 3 times a day for a 28-day course (followed by 28 days off CAYSTON therapy). Dosage is not based on weight or adjusted for age. Doses should be taken at least 4 hours apart.
CAYSTON is administered by inhalation using an Altera ® Nebulizer System. Patients should use a bronchodilator before administration of CAYSTON.
2.2Instructions for CAYSTON Reconstitution CAYSTON should be administered immediately after reconstitution. Do not reconstitute CAYSTON until ready to administer a dose. Take one amber glass vial containing CAYSTON and one diluent ampule from the carton.
To open the glass vial, carefully remove the blue cap and metal ring and remove the gray rubber stopper. Twist the tip off the diluent ampule and squeeze the liquid into the glass vial. Replace the rubber stopper, then gently swirl the vial until contents have completely dissolved.
The empty vial, stopper, and diluent ampule should be disposed of properly upon completion of dosing.
2.3Instructions for CAYSTON Administration CAYSTON is administered by inhalation using an Altera Nebulizer System. CAYSTON should not be administered with any other nebulizer. CAYSTON should not be mixed with any other drugs in the Altera Nebulizer Handset.
CAYSTON is not for intravenous or intramuscular administration. Patients should use a bronchodilator before administration of CAYSTON. Short-acting bronchodilators can be taken between 15 minutes and 4 hours prior to each dose of CAYSTON.
Alternatively, long-acting bronchodilators can be taken between 30 minutes and 12 hours prior to administration of CAYSTON. For patients taking multiple inhaled therapies, the recommended order of administration is as follows: bronchodilator, mucolytics, and lastly, CAYSTON. To administer CAYSTON, pour the reconstituted solution into the handset of the nebulizer system.
Turn the unit on. Place the mouthpiece of the handset in your mouth and breathe normally only through your mouth. Administration typically takes between 2 and 3 minutes.
Further patient instructions on how to administer CAYSTON are provided in the FDA-approved patient labeling. Instructions on testing nebulizer functionality and cleaning the handset are provided in the Instructions for Use included with the nebulizer system.
💊 Dosage Forms and Strengths ▾
3 DOSAGE FORMS AND STRENGTHS A dose of CAYSTON consists of a single-use vial of sterile, lyophilized aztreonam (75 mg) reconstituted with a 1 mL ampule of sterile diluent (0.17% sodium chloride). Reconstituted CAYSTON is administered by inhalation. Lyophilized aztreonam (75 mg/vial) ( 3 ) Diluent (0.17% sodium chloride): 1 mL/ampule ( 3 )
⛔ Contraindications ▾
4 CONTRAINDICATIONS CAYSTON is contraindicated in patients with a known allergy to aztreonam. Contraindicated in patients with a known allergy to aztreonam. ( 4 )
⚠️ Warnings and Cautions ▾
5 WARNINGS AND PRECAUTIONS Allergic reaction to CAYSTON was seen in clinical trials. Stop treatment if an allergic reaction occurs. Use caution when CAYSTON is administered to patients with a known allergic reaction to beta-lactams. ( 5.1 ) Bronchospasm has been reported with CAYSTON. Stop treatment if chest tightness develops during nebulizer use. ( 5.2 )
5.1Allergic Reactions Severe allergic reactions have been reported following administration of aztreonam for injection to patients with no known history of exposure to aztreonam. In addition, allergic reaction with facial rash, facial swelling, and throat tightness was reported with CAYSTON in clinical trials. If an allergic reaction to CAYSTON occurs, stop administration of CAYSTON and initiate treatment as appropriate.
Caution is advised when administering CAYSTON to patients if they have a history of beta-lactam allergy, although patients with a known beta-lactam allergy have received CAYSTON in clinical trials and no severe allergic reactions were reported. A history of allergy to beta-lactam antibiotics, such as penicillins, cephalosporins, and/or carbapenems, may be a risk factor, since cross-reactivity may occur.
5.2Bronchospasm Bronchospasm is a complication associated with nebulized therapies, including CAYSTON. Reduction of 15% or more in forced expiratory volume in 1 second (FEV 1 ) immediately following administration of study medication after pretreatment with a bronchodilator was observed in 3% of patients treated with CAYSTON.
5.3Decreases in FEV 1 After 28-Day Treatment Cycle In clinical trials, patients with increases in FEV 1 during a 28-day course of CAYSTON were sometimes treated for pulmonary exacerbations when FEV 1 declined after the treatment period. Healthcare providers should consider a patient's baseline FEV 1 measured prior to CAYSTON therapy and the presence of other symptoms when evaluating whether post-treatment changes in FEV 1 are caused by a pulmonary exacerbation.
5.4Development of Drug-Resistant Bacteria Prescribing CAYSTON in the absence of known Pseudomonas aeruginosa infection in patients with CF is unlikely to provide benefit and increases the risk of development of drug-resistant bacteria.
🤒 Adverse Reactions ▾
6 ADVERSE REACTIONS Common adverse reactions (more than 5%) occurring more frequently in CAYSTON patients are cough, nasal congestion, wheezing, pharyngolaryngeal pain, pyrexia, chest discomfort, abdominal pain and vomiting. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Gilead Sciences, Inc. at 1-800-GILEAD5, option 3 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
6.1Clinical 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 (5.2) ] and rash (2%).
6.2Postmarketing 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
🔄 Drug Interactions ▾
7 DRUG INTERACTIONS No formal clinical studies of drug interactions with CAYSTON have been conducted.
👥 Use in Specific Populations ▾
8 USE IN SPECIFIC POPULATIONS
8.1Pregnancy Risk Summary Available data on CAYSTON use in pregnant women is insufficient to inform a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes; however, systemic absorption of aztreonam following inhaled administration is expected to be minimal [see Clinical Pharmacology (12.3) ]. There are risks to the mother associated with cystic fibrosis in pregnancy (see Clinical Considerations ) . In animal reproduction studies with aztreonam for injection administered parenterally to pregnant rats and rabbits during organogenesis, there was no evidence of developmental toxicity.
A peri/postnatal study in rats revealed no drug-induced changes in maternal, fetal, or neonatal parameters. The estimated background risk of major birth defects and miscarriage for the indicated population are unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes.
In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk Cystic fibrosis may increase the risk for preterm delivery. Data Animal Data No reproductive toxicity studies have been conducted with CAYSTON.
However, studies were conducted with aztreonam for injection. No evidence of developmental toxicity has been shown in studies with pregnant rats and rabbits that received parenteral doses of aztreonam during organogenesis of up to 1800 and 1200 mg/kg/day, respectively. In rats receiving aztreonam for injection during late gestation and lactation at up to 1800 mg/kg/day, no drug induced changes in maternal, fetal or neonatal parameters were observed.
These animal reproduction and developmental toxicity studies used parenteral routes of administration that would provide systemic exposures significantly greater than the average peak plasma levels measured in humans following CAYSTON therapy.
8.2Lactation Risk Summary Following intravenous administration of aztreonam for injection, aztreonam is excreted in human milk at concentrations that are less than one percent of those determined in simultaneously obtained maternal serum. Peak plasma concentrations of aztreonam following administration of CAYSTON (75 mg) are approximately 1% of peak concentrations observed following IV aztreonam (500 mg). Systemic absorption of aztreonam following inhaled administration is expected to be minimal [see Clinical Pharmacology (12.3) ].
There are no data on the effects of aztreonam on the breastfed infant or the effects on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for CAYSTON and any potential adverse effects on the breastfed infant from CAYSTON or from the underlying maternal condition.
8.4Pediatric Use Patients 7 years and older were included in clinical trials with CAYSTON. Fifty-five patients under 18 years of age received CAYSTON in placebo-controlled trials. No dose adjustments were made for pediatric patients. Pyrexia was more commonly reported in pediatric patients than in adult patients. Safety and effectiveness in pediatric patients below the age of 7 years have not been established.
8.5Geriatric Use Clinical trials of CAYSTON did not include CAYSTON-treated patients aged 65 years of age and older to determine whether they respond differently from younger patients.
8.6Use in Patients with Renal Impairment Aztreonam is known to be excreted by the kidney. Placebo-controlled clinical trials with CAYSTON excluded patients with abnormal baseline renal function (defined as serum creatinine greater than 2 times the upper limit of normal range). Given the low systemic exposure of aztreonam following administration of CAYSTON, clinically relevant accumulation of aztreonam is unlikely to occur in patients with r…
🤰 Pregnancy ▾
8.1Pregnancy Risk Summary Available data on CAYSTON use in pregnant women is insufficient to inform a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes; however, systemic absorption of aztreonam following inhaled administration is expected to be minimal [see Clinical Pharmacology (12.3) ]. There are risks to the mother associated with cystic fibrosis in pregnancy (see Clinical Considerations ) . In animal reproduction studies with aztreonam for injection administered parenterally to pregnant rats and rabbits during organogenesis, there was no evidence of developmental toxicity.
A peri/postnatal study in rats revealed no drug-induced changes in maternal, fetal, or neonatal parameters. The estimated background risk of major birth defects and miscarriage for the indicated population are unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes.
In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk Cystic fibrosis may increase the risk for preterm delivery. Data Animal Data No reproductive toxicity studies have been conducted with CAYSTON.
However, studies were conducted with aztreonam for injection. No evidence of developmental toxicity has been shown in studies with pregnant rats and rabbits that received parenteral doses of aztreonam during organogenesis of up to 1800 and 1200 mg/kg/day, respectively. In rats receiving aztreonam for injection during late gestation and lactation at up to 1800 mg/kg/day, no drug induced changes in maternal, fetal or neonatal parameters were observed.
These animal reproduction and developmental toxicity studies used parenteral routes of administration that would provide systemic exposures significantly greater than the average peak plasma levels measured in humans following CAYSTON therapy.
🧒 Pediatric Use ▾
8.4Pediatric Use Patients 7 years and older were included in clinical trials with CAYSTON. Fifty-five patients under 18 years of age received CAYSTON in placebo-controlled trials. No dose adjustments were made for pediatric patients. Pyrexia was more commonly reported in pediatric patients than in adult patients. Safety and effectiveness in pediatric patients below the age of 7 years have not been established.
🧓 Geriatric Use ▾
8.5Geriatric Use Clinical trials of CAYSTON did not include CAYSTON-treated patients aged 65 years of age and older to determine whether they respond differently from younger patients.
🆘 Overdosage ▾
10 OVERDOSAGE No overdoses have been reported with CAYSTON in clinical trials to date. In clinical trials, 225 mg doses of CAYSTON via inhalation were associated with higher rates of drug-related respiratory adverse reactions, particularly cough. Since the peak plasma concentration of aztreonam following administration of CAYSTON (75 mg) is approximately 0.6 mcg/mL, compared to a serum concentration of 54 mcg/mL following administration of aztreonam for injection (500 mg), no systemic safety issues associated with CAYSTON overdose are anticipated.
🧬 Clinical Pharmacology ▾
12 CLINICAL PHARMACOLOGY
12.1Mechanism of Action Aztreonam is an antibacterial drug [see Clinical Pharmacology (12.4) ] .
12.3Pharmacokinetics Sputum Concentrations Sputum aztreonam concentrations exhibited considerable variability between patients receiving CAYSTON (75 mg) in clinical trials. The mean sputum concentration 10 minutes following the first dose of CAYSTON (n = 195 patients with CF) was 726 mcg/g. Mean sputum concentrations of aztreonam in patients receiving CAYSTON 3 times a day for 28 days were 984 mcg/g, 793 mcg/g, and 715 mcg/g 10 minutes after dose administration on Days 0, 14, and 28, respectively, indicating no accumulation of aztreonam in sputum.
Plasma Concentrations Plasma aztreonam concentrations exhibited considerable variability between patients receiving CAYSTON (75 mg) in the clinical trials. The mean plasma concentration one hour following the first dose of CAYSTON (at approximately the peak plasma concentration) was 0.59 mcg/mL. Mean peak plasma concentrations in patients receiving CAYSTON 3 times a day for 28 days were 0.55 mcg/mL, 0.67 mcg/mL, and 0.65 mcg/mL on Days 0, 14, and 28, respectively, indicating no systemic accumulation of aztreonam.
In contrast, the serum concentration of aztreonam following administration of aztreonam for injection (500 mg) is approximately 54 mcg/mL. Absorption Evaluation of plasma and urine aztreonam concentrations following administration of CAYSTON indicates low systemic absorption of aztreonam. Approximately 10% of the total CAYSTON dose is excreted in the urine as unchanged drug, as compared to 60–65% following intravenous administration of aztreonam for injection.
Distribution The protein binding of aztreonam in plasma is approximately 77% within the clinical dose range of concentrations achieved following CAYSTON administration. Metabolism Following intramuscular administration of aztreonam for injection 500 mg every 8 hours for 7 days, approximately 6% of the dose was excreted as a microbiologically inactive open β-lactam ring hydrolysis product in an 8-hour urine collection on the last day of multiple dosing. Excretion The elimination half-life of aztreonam from plasma is approximately 2.1 hours following administration of CAYSTON to adult patients with CF, similar to what has been reported for aztreonam for injection.
Approximately 10% of the total CAYSTON dose is excreted in the urine as unchanged drug. Systemically absorbed aztreonam is eliminated about equally by active tubular secretion and glomerular filtration. Following administration of a single intravenous dose of radiolabeled aztreonam for injection, about 12% of the dose was recovered in the feces.
12.4Microbiology Mechanism of Action Aztreonam exhibits activity in vitro against Gram-negative aerobic pathogens including P. aeruginosa . Aztreonam binds to penicillin-binding proteins of susceptible bacteria, which leads to inhibition of bacterial cell wall synthesis and death of the cell. Aztreonam activity is not decreased in the presence of CF lung secretions.
Susceptibility Testing A single sputum sample from a patient with CF may contain multiple morphotypes of P. aeruginosa and each morphotype may have a different level of in vitro susceptibility to aztreonam. There are no in vitro susceptibility test interpretive criteria for isolates of P. aeruginosa obtained from the sputum of CF patients. 1 Development of Resistance No changes in the susceptibility of P. aeruginosa to aztreonam were observed following a 28-day course of CAYSTON in the placebo-controlled trials.
Cross-Resistance No cross-resistance to other classes of antibiotics, including aminoglycosides, quinolones, and beta-lactams, was observed following a 28-day course of CAYSTON in the Phase 3 placebo-controlled trials or in an open-label follow-on trial of up to nine 28-day courses of 75 mg CAYSTON 3 times a day. Other No trends in the treatment-emergent isolation of other bacterial respiratory pathogens ( Burkholderia cepacia…
🧬 Mechanism of Action ▾
12.1Mechanism of Action Aztreonam is an antibacterial drug [see Clinical Pharmacology (12.4) ] .
📦 How Supplied / Storage and Handling ▾
16 HOW SUPPLIED/STORAGE AND HANDLING Each kit for a 28-day course of CAYSTON contains 84 sterile vials of CAYSTON and 88 ampules of sterile diluent packed in 2 cartons, each carton containing a 14-day supply. The four additional diluent ampules are provided in case of spillage. Package Configuration Dosage Strength NDC 28-Day Kit 75 mg 61958-0901-1 CAYSTON vials and diluent ampules should be stored in the refrigerator at 2 °C to 8 °C (36 °F to 46 °F) until needed.
Once removed from the refrigerator, CAYSTON and diluent may be stored at room temperature (up to 25 °C/77 °F) for up to 28 days. Do not separate the CAYSTON vials from the diluent ampules. CAYSTON should be protected from light.
Do not use CAYSTON if it has been stored at room temperature for more than 28 days. Do not use CAYSTON beyond the expiration date stamped on the vial. Do not use diluent beyond the expiration date embossed on the ampule.
CAYSTON should be used immediately upon reconstitution. Do not reconstitute more than one dose at a time. Do not use diluent or reconstituted CAYSTON if it is cloudy or if there are particles in the solution.
📦 Storage and Handling ▾
CAYSTON vials and diluent ampules should be stored in the refrigerator at 2 °C to 8 °C (36 °F to 46 °F) until needed. Once removed from the refrigerator, CAYSTON and diluent may be stored at room temperature (up to 25 °C/77 °F) for up to 28 days. Do not separate the CAYSTON vials from the diluent ampules.
CAYSTON should be protected from light. Do not use CAYSTON if it has been stored at room temperature for more than 28 days. Do not use CAYSTON beyond the expiration date stamped on the vial.
Do not use diluent beyond the expiration date embossed on the ampule. CAYSTON should be used immediately upon reconstitution. Do not reconstitute more than one dose at a time.
Do not use diluent or reconstituted CAYSTON if it is cloudy or if there are particles in the solution.
📋 Description ▾
11 DESCRIPTION A dose of CAYSTON consists of a 2 mL amber glass vial containing lyophilized aztreonam (75 mg) and lysine (46.7 mg), and a low-density polyethylene ampule containing 1 mL sterile diluent (0.17% sodium chloride). The reconstituted solution is for inhalation. The formulation contains no preservatives or arginine.
The active ingredient in CAYSTON is aztreonam, a monobactam antibacterial. The monobactams are structurally different from beta-lactam antibiotics (e.g., penicillins, cephalosporins, carbapenems) due to a monocyclic nucleus. This nucleus contains several side chains; sulfonic acid in the 1-position activates the nucleus, an aminothiazolyl oxime side chain in the 3-position confers specificity for aerobic Gram-negative bacteria including Pseudomonas spp ., and a methyl group in the 4-position enhances beta-lactamase stability.
Aztreonam is designated chemically as ( Z )-2-[[[(2-amino-4-thiazolyl)[[(2 S ,3 S )-2-methyl-4-oxo-1-sulfo-3-azetidinyl]carbamoyl]methylene]amino]oxy]-2-methylpropionic acid. The structural formula is presented below: CAYSTON is a white to off-white powder. CAYSTON is sterile, hygroscopic, and light sensitive.
Once reconstituted with the supplied diluent, the pH range is 4.5 to 6.0. Chemical Structure
💬 Information for Patients ▾
17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information and Instructions for Use). Allergic Reactions Advise patients to tell their healthcare provider immediately if they believe they are experiencing new or worsening symptoms or believe they are having an allergic reaction to CAYSTON [see Warnings and Precautions (5.1) ]. Development of Drug-Resistant Bacteria Counsel patients that antibacterial drugs including CAYSTON should only be used to treat bacterial infections.
They do not treat viral infection (e.g., the common cold). When CAYSTON is prescribed to treat a bacterial infection, inform patients that although it is common to feel better early in the course of therapy, the medication should be taken exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by CAYSTON or other antibacterial drugs in the future [see Warnings and Precautions (5.4) ].
Reconstitution and Administration Advise patients that: CAYSTON is for inhalation use only and should only be administered using the Altera Nebulizer System. CAYSTON should only be reconstituted with the provided diluent. Instruct patients not to mix other drugs with CAYSTON in the Altera Nebulizer System.
Advise patients to: use a bronchodilator prior to administration of CAYSTON. complete the full 28-day course of CAYSTON even if they are feeling better. Advise patients taking several inhaled medications to use the medications in the following order: bronchodilator, mucolytics, and lastly, CAYSTON. Missed Dose Inform the patient that if they miss a dose, they should take all 3 daily doses as long as the doses are at least 4 hours apart.