Possible Side Effects Cipro
The most frequent side effects include nausea, vomiting, diarrhea, abdominal pain, rash, headache, and restlessness. Rare allergic reactions have been described, such as hives and anaphylaxis (shock).

Drug Class and Mechanism Cipro
Many common infections in humans are caused by single cell organisms, called bacteria. Bacteria can grow and multiply, infecting different parts of the body. Medicines that control and eradicate these bacteria are called antibiotics. Ciprofloxacin is an antibiotic that stops multiplication of bacteria by inhibiting the reproduction and repair of their genetic material (DNA).

More InformationCipro here
If you experience any of the following serious side effects, stop taking ciprofloxacin and seek emergency medical attention or contact your doctor immediately: an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives); seizures; confusion or hallucinations; liver damage (yellowing of the skin or eyes, nausea, abdominal pain or discomfort, unusual bleeding or bruising, severe fatigue); or muscle or joint pain; skin rash; or chest pain, chest discomfort, shortness of breath, or swelling of the legs or feet.If you experience any of the following less serious side effects, continue taking ciprofloxacin and talk to your doctor: nausea, vomiting, diarrhea; headache; dizziness or lightheadedness; drowsiness; insomnia; ringing in the ears; or increased sensitivity of the skin to sunlight.Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.