Ciprofloxacin is often given to fight bacterial infections, but there are some side effects that can be expected with use of this medication. Some of the most common effects involve the stomach area, as they tend to include nausea, diarrhea, heartburn, and vomiting. Headaches, vaginal itching, and excessive urination may also occur in some patients, though such ciprofloxacin side effects do not typically call for immediate medical attention. On the other hand, certain negative signs should be mentioned to a doctor as soon as possible, such as a rash, fever, depression, or flu-like symptoms. Some even call for emergency treatment since they may be life-threatening, including throat tightness, wheezing, and irregular heartbeat.

Many patients taking this drug will suffer from some side effects until their body gets used to it, at which point the symptoms should subside. Stomach problems are some of the most common ciprofloxacin side effects, such as diarrhea, nausea, and vomiting. Heartburn and pain in the stomach can also occur, and may be accompanied by headaches and urgent urination. Finally, females may notice some vaginal discharge and itching. While these ciprofloxacin side effects are often bothersome, they are not considered life-threatening, so patients who notice them are encouraged to continue taking the medication until they can mention the issue to their doctor at their next appointment.

Some ciprofloxacin side effects are not considered normal, and may lead to serious issues. For example, some people notice adverse physical symptoms that may include a skin rash, hives, sudden bruising, and tremors. Others may assume that they have the flu, since fatigue, fever, and loss of appetite may occur. What these patients might not expect is a change in the mental state, as this drug can bring on depression, anxiety, confusion, and paranoia. These ciprofloxacin side effects can be considered dangerous since they may lead to suicide or car accidents, although insomnia, nightmares, and hallucinations are more common results.

While all ciprofloxacin side effects should be reported to a doctor, some require emergency treatment. For instance, it may become hard to breathe when taking this drug, as the throat may swell. This often results in wheezing, a feeling of throat tightness, and difficulty swallowing. The heartbeat may also become irregular, beating faster than usual, partly due to the body's panic at not being able to breathe easily. Seizures and fainting may also result, making it crucial to get medical care as soon as possible.