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Avycaz Side Effects

Generic Name: avibactam / ceftazidime

Note: This page contains information about the side effects of avibactam / ceftazidime. Some of the dosage forms included on this document may not apply to the brand name Avycaz.

For the Consumer

Applies to avibactam / ceftazidime: intravenous powder for solution

In addition to its needed effects, some unwanted effects may be caused by avibactam / ceftazidime. In the event that any of these side effects do occur, they may require medical attention.

If any of the following side effects occur while taking avibactam / ceftazidime, check with your doctor or nurse immediately:

Less common or rare:
  • Agitation
  • black, tarry stools
  • bleeding gums
  • blood in the urine or stools
  • bluish color changes in skin color
  • chest pain
  • chills
  • coma
  • confusion
  • convulsions
  • cough
  • decreased urine
  • dizziness
  • fever
  • headache
  • hostility
  • increased thirst
  • irregular heartbeat
  • lethargy
  • loss of appetite
  • muscle pain or cramps
  • muscle twitching
  • nausea or vomiting
  • numbness or tingling in the hands, feet, or lips
  • painful or difficult urination
  • pinpoint red spots on the skin
  • rapid weight gain
  • seizures
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • stupor
  • swelling of the face, ankles, hands, foot, or leg
  • swollen glands
  • tenderness
  • unusual bleeding or bruising
  • unusual tiredness or weakness
Incidence not known:
  • Difficulty swallowing
  • fast heartbeat
  • hives, itching, or skin rash
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • tightness in the chest

Minor Side Effects

Some of the side effects that can occur with avibactam / ceftazidime may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common:
  • Abdominal or stomach pain
  • diarrhea
  • difficulty having a bowel movement (stool)
Less common or rare:
  • Change in taste
  • loss of taste
  • redness of the skin
  • white patches in the mouth or throat or on the tongue
  • white patches with diaper rash

For Healthcare Professionals

Applies to avibactam / ceftazidime: intravenous powder for injection


The most common side effects reported in the phase 2 complicated intraabdominal infection (cIAI) trial were vomiting and nausea. Serious side effects were reported in 9 of 101 patients using this drug with metronidazole compared with 11 of 102 patients using meropenem. The most common side effects leading to discontinuation of this drug were skin and subcutaneous tissue disorders. In a phase 3 cIAI trial, death occurred in 13 of 529 patients using this drug with metronidazole compared with 8 of 529 patients using meropenem.

The most common side effects reported in the phase 2 complicated urinary tract infection trial were constipation and anxiety. Serious side effects were reported in 6 of 68 patients using this drug compared with 2 of 67 patients using imipenem-cilastatin. This drug was discontinued prematurely in 1 patient due to accidental overdose and 1 patient due to atrial fibrillation.[Ref]


Very common (10% or more): Vomiting (up to 14%)
Common (1% to 10%): Nausea, constipation, abdominal pain, upper abdominal pain
Frequency not reported: Clostridium difficile-associated diarrhea[Ref]


In a phase 3 cIAI trial, death occurred in 2.5% of patients using this drug with metronidazole and 1.5% of patients using meropenem. In a subgroup of patients with baseline CrCl 30 to 50 mL/min, death occurred in 8 of 31 patients using this drug with metronidazole and 3 of 35 patients using meropenem; patients using this drug received a 33% lower daily dose than is currently recommended for this patient population. In patients with baseline CrCl greater than 50 mL/min, death occurred in 5 of 498 patients using this drug with metronidazole and 5 of 494 patients using meropenem. Cause of death varied; contributing factors included progression of underlying infection, baseline pathogens isolated that were unlikely to respond to study drug, and delayed surgical intervention.[Ref]

Common (1% to 10%): Seroconversion from negative to positive direct Coombs test result, death
Frequency not reported: Decreased clinical response, accidental overdose

-Frequency not reported: Candidiasis[Ref]


Common (1% to 10%): Anxiety[Ref]


Common (1% to 10%): Increased blood alkaline phosphatase
Frequency not reported: Hypokalemia

-Frequency not reported: Increased blood lactate dehydrogenase[Ref]


Common (1% to 10%): Increased blood ALT
Frequency not reported: Increased GGT

-Frequency not reported: Jaundice[Ref]

Nervous system

Common (1% to 10%): Dizziness

-Frequency not reported: Dysgeusia, paresthesia, seizures, nonconvulsive status epilepticus, encephalopathy, coma, asterixis, neuromuscular excitability, myoclonia[Ref]


Frequency not reported: Acute renal failure, renal impairment

-Frequency not reported: Tubulointerstitial nephritis[Ref]


Frequency not reported: Rash, skin and subcutaneous tissue disorders

Beta-lactam antibacterial drugs:
-Frequency not reported: Serious skin reactions

-Frequency not reported: Angioedema, erythema multiforme, pruritus, Stevens-Johnson syndrome, toxic epidermal necrolysis, urticaria[Ref]


Frequency not reported: Eosinophilia, thrombocytopenia, prolonged prothrombin time

-Frequency not reported: Agranulocytosis, hemolytic anemia, leukopenia, lymphocytosis, neutropenia, thrombocytosis[Ref]


Frequency not reported: Atrial fibrillation[Ref]


Beta-lactam antibacterial drugs:
-Frequency not reported: Serious and sometimes fatal hypersensitivity (anaphylactic) reactions[Ref]


-Frequency not reported: Infusion-site inflammation, injection-site hematoma, injections-site phlebitis, injection-site thrombosis[Ref]


-Frequency not reported: Vaginal inflammation[Ref]


1. "Product Information. Avycaz (avibactam-cefTAZidime)." Forest Pharmaceuticals, St. Louis, MO.

Not all side effects for Avycaz may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.