Blood and Lymphatic System Disorders: Transient episodes of mild neutropenia have occasionally been observed in clinical trials.
Ear and Labyrinth Disorders: Hearing impairment (including hearing loss, deafness, and/or tinnitus) has been reported in some patients receiving azithromycin. Many of these have been associated with prolonged use of high doses in investigational studies. In those cases where follow-up information was available, the majority of these events were reversible.
Gastrointestinal Disorders: Nausea, vomiting, diarrhea, loose stools, abdominal discomfort (pain/cramps), and flatulence.
Hepatobiliary Disorders: Abnormal liver function.
Skin and Subcutaneous Tissue Disorders: Frequency not known: severe cutaneous adverse reactions (SCARs) including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), drug reaction with eosinophilia and systemic symptoms (DRESS) & acute generalised exanthematous pustulosis (AGEP).
General Disorders and Administration Site Conditions: Local pain and inflammation at the site of infusion.
Additional undesirable effects that have been reported in post-marketing experience: Infections and Infestations: Moniliasis and vaginitis.
Blood and Lymphatic System Disorders: Thrombocytopenia.
Immune System Disorders: Anaphylaxis (rarely fatal).
Metabolism and Nutrition Disorders: Anorexia.
Psychiatric Disorders: Aggressive reaction, nervousness, agitation, and anxiety.
Nervous System Disorders: Dizziness, convulsions, headache, hyperactivity, hypoesthesia, paresthesia, somnolence, and syncope. There have been rare reports of taste/smell perversion and/or loss.
Ear and Labyrinth Disorders: Deafness, tinnitus, hearing impaired, and vertigo.
Cardiac Disorders: Palpitations and arrhythmias, including ventricular tachycardia, have been reported. There have been rare reports of QT prolongations and torsades de pointes.
Vascular Disorders: Hypotension.
Gastrointestinal Disorders: Vomiting/diarrhea (rarely resulting in dehydration), dyspepsia, constipation, pseudomembranous colitis, pancreatitis, rare reports of tongue discoloration, and infantile hypertrophic pyloric stenosis.
Hepatobiliary Disorders: Hepatitis and cholestatic jaundice have been reported, as well as rare cases of hepatic necrosis and hepatic failure, which have resulted in death.
Skin and Subcutaneous Tissue Disorders: Allergic reactions, including pruritus, rash, photosensitivity, edema, urticaria, and angioedema. Rarely, serious cutaneous adverse reactions, including erythema multiforme, AGEP, SJS, TEN, and DRESS, have been reported.
Musculoskeletal and Connective Tissue Disorders: Arthralgia.
Renal and Urinary Disorders: Interstitial nephritis and acute renal failure.
General Disorders and Administration Site Conditions: Asthenia, fatigue, and malaise.