Although side effects from aztreonam are not common, they can occur. Tell your health care provider if any of these symptoms are severe or do not go away: diarrhea upset stomach vomiting cramps bloating changes in taste sensation If you experience any of the following symptoms, call your health care provider immediately: rash itching fever chills facial swelling sneezing wheezing difficulty breathing unusual bleeding or bruising unusual tiredness confusion seizures sore mouth or throat
