Levofloxacin Side Effects
Common Side Effects of Levofloxacin
Levofloxacin has been studied thoroughly in clinical trials. In these studies, the side effects that occurred in a group of people taking levofloxacin were documented and compared to side effects that occurred in a similar group of people taking a different antibiotic. This way, it is possible to see what side effects occurred, how often they appeared, and how they compare to the group taking a different medication.
In these studies, the most common side effects of levofloxacin included:
- Nausea -- in up to 7 percent of people
- Headaches -- up to 6 percent
- Diarrhea -- up to 5 percent
- Insomnia -- up to 4 percent (see Levaquin and Insomnia)
- Dizziness -- up to 3 percent
- Constipation -- up to 3 percent.
Other common side effects (occurring in 1 to 2 percent of people) included:
- Yeast infections
- Shortness of breath
- Abdominal pain (stomach pain)
- Indigestion or heartburn
- Water retention
- Chest pain
- Pain at the injection site (when the medication is given by IV)
- Vaginal irritation or infection.
There are other, rare levofloxacin side effects that can occur. These side effects occur in less than 1 percent of people taking the medication. For these side effects, it is difficult to tell whether they are actually caused by levofloxacin or something else.
These rare levofloxacin side effects include, but are not limited to:
- Loss of appetite
- A spinning sensation (vertigo)
- Changes in taste or smell
- Voice changes
- Ringing of the ears (tinnitus)
- Sensitivity to the sun.