You should talk with your healthcare provider prior to taking this medication if you have:
- Low potassium levels in the blood (hypokalemia)
- Seizures or epilepsy
- Cerebral arteriosclerosis (hardening and thickening of the arteries of the brain)
- An irregular heart rhythm known as long QT syndrome
- Had a heart, liver, or lung transplant
- Rheumatoid arthritis
- Kidney disease, such as kidney failure (renal failure)
- Any allergies, including allergies to food, dyes, or preservatives
- Myasthenia gravis.
Also, let your healthcare provider know if you are:
- Pregnant or thinking of becoming pregnant (see Avelox and Pregnancy)
- Breastfeeding (see Avelox and Breastfeeding).
Make sure to tell your healthcare provider about all other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Precautions and Warnings With Moxifloxacin to learn more, including information on who should not take the drug.)
Moxifloxacin belongs to a class of antibiotics known as fluoroquinolones, also known as "quinolones." These medications work by interfering with two important bacterial enzymes (topoisomerase IV and DNA gyrase). These enzymes are necessary for bacteria to be able to copy and repair DNA (important steps required in order for bacteria to multiply).