Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction to Zithromax: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using Zithromax and call your doctor at once if you have a serious side effect such as:

  1. diarrhea that is watery or bloody;
  2. headache with chest pain and severe dizziness, fainting, fast or pounding heartbeats;
  3. nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
  4. severe skin reaction — fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.

Less serious Zithromax side effects may include:

  1. mild diarrhea, vomiting, constipation;
  2. stomach pain or upset;
  3. dizziness, tired feeling, mild headache;
  4. nervous feeling, sleep problems (insomnia);
  5. vaginal itching or discharge;
  6. mild rash or itching;
  7. ringing in your ears, problems with hearing; or
  8. decreased sense of taste or smell.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

See also: