Common side effects of taking Zithromax include diarrhea and loose stools, according to Drugs.com. Less common side effects include fever, swelling, and cracked, dry or scaly skin. Zithromax may also cause reddening, crusting, irritation or itching of the skin.
Rare side effects associated with Zithromax include a burning sensation when urinating, cloudy or bloody urine, dark urine, and bloody, tarry or black stools, notes Drugs.com. Some people may experience abdominal or stomach pain, congestion, chills or dizziness after using Zithromax. Other rare side effects include an increased cough, congestion, drowsiness, and soreness or dryness in the throat.
Zithromax may cause some people to feel generally unwell, reports Drugs.com. It can also cause a feeling of weakness or tiredness and itching and pain in the joints or muscles. Zithromax may cause some people to pass gas, and it can also cause discomfort, pain or fullness in the stomach. Other rare side effects include shortness of breath, voice changes, sweating, and yellowing of the skin or eyes.
Some people may vomit blood after taking Zithromax, and it can also cause bad breath, according to Drugs.com. Zithromax may cause some people to have trouble sleeping at night. There are many other possible side effects associated with Zithromax, and it is important to speak with a health care professional immediately if side effects occur.