The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Swelling or pain in the vein after IV injection (2%)
 - Swelling or discomfort at the IM injection site (2%)
 
Less Common Side Effects
- Diarrhea
 - Nausea
 - Vomiting
 - Rash
 
Aztreonam serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Serious allergic reaction: hives, rash, blisters, skin reddening, swelling of the lips or tongue, difficulty breathing
 - Infectious diarrhea: foul-smelling diarrhea, frequent bowel movements (up to 15 times per day), fever, stomach pain or cramps
 
Source: DailyMed
The following Aztreonam side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Less common or rare
Black, tarry stools
blood in urine or stools
burning or itching of vagina
chills
confusion
convulsions (seizures)
dark urine
difficulty in breathing
discharge from vagina
discomfort, inflammation, or swelling at the injection site
dizziness
flu-like symptoms
general feeling of illness
headache
light gray-colored stools
loss of appetite
numbness of tongue
pinpoint red spots on skin
seeing double
skin rash, redness, or itching
unusual bleeding or bruising
unusual tiredness or weakness
yellow skin or eyes
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Less common or rare
Abdominal or stomach cramps
altered sense of taste
breast tenderness
burning or prickling feeling of skin
flushing
increased sweating
mouth ulcers
muscular aches
nausea or vomiting
ringing, buzzing, or noise in ear
small, nonraised, round, purplish or red spots on skin
trouble in sleeping
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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