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Moxifloxacin

Generic Name: moxifloxacin (oral) (moxi FLOX a sin)
Brand Name: Avelox, Avelox I.V.

Medically reviewed on Aug 15, 2018

What is moxifloxacin?

Moxifloxacin is a fluoroquinolone (floor-o-KWIN-o-lone) antibiotic that fights bacteria in the body.

Moxifloxacin is used to treat different types of bacterial infections of the skin, sinuses, lungs, or stomach.

Fluoroquinolone antibiotics can cause serious or disabling side effects that may not be reversible. Moxifloxacin should be used only for infections that cannot be treated with a safer antibiotic.

Moxifloxacin may also be used for purposes not listed in this medication guide.

Important Information

Moxifloxacin can cause serious side effects, including tendon problems, nerve damage, serious mood or behavior changes, or low blood sugar.

Stop taking moxifloxacin and call your doctor at once if you have symptoms such as: headache, hunger, irritability, feeling anxious or shaky, numbness, tingling, burning pain, confusion, agitation, paranoia, problems with memory or concentration, or thoughts of suicide.

Moxifloxacin may cause swelling or tearing of a tendon. Stop taking moxifloxacin and call your doctor at once if you have sudden pain, swelling, bruising, tenderness, stiffness, or movement problems in any of your joints.

Before taking this medicine

You should not use this medicine if you are allergic to moxifloxacin or other fluoroquinolones (ciprofloxacin, gemifloxacin, levofloxacin, ofloxacin, norfloxacin, and others).

Moxifloxacin may cause swelling or tearing of a tendon (the fiber that connects bones to muscles in the body), especially in the Achilles' tendon of the heel. This can happen during treatment or up to several months after you stop taking moxifloxacin. Tendon problems may be more likely to occur if you are over 60, if you take steroid medication, or if you have had a kidney, heart, or lung transplant.

Tell your doctor if you have ever had:

Moxifloxacin is not approved for use by anyone younger than 18 years old.

It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant.

You should not breast-feed while using this medicine.

How should I take moxifloxacin?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Take moxifloxacin with water, and drink extra fluids to keep your kidneys working properly.

You may take moxifloxacin with or without food, at the same time each day.

Use moxifloxacin for the full prescribed length of time, even if your symptoms quickly improve. Skipping doses can increase your risk of infection that is resistant to medication. Moxifloxacin will not treat a viral infection such as the flu or a common cold.

Do not share moxifloxacin with another person.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking moxifloxacin?

Do not take moxifloxacin with dairy products such as milk or yogurt, or with calcium-fortified juice. You may eat or drink these products as part of a regular meal, but do not use them alone when taking moxifloxacin. They could make the medication less effective.

Avoid driving or hazardous activity until you know how moxifloxacin will affect you. Your reactions could be impaired.

Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, call your doctor before using anti-diarrhea medicine.

Moxifloxacin could make you sunburn more easily. Avoid sunlight or tanning beds. Wear protective clothing and use sunscreen (SPF 30 or higher) when you are outdoors. Tell your doctor if you have severe burning, redness, itching, rash, or swelling after being in the sun.

Moxifloxacin side effects

Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling).

Moxifloxacin can cause serious side effects, including tendon problems, side effects on your nerves (which may cause permanent nerve damage), serious mood or behavior changes (after just one dose), or low blood sugar (which can lead to coma).

Stop taking this medicine and call your doctor at once if you have:

  • low blood sugar--headache, hunger, sweating, irritability, dizziness, nausea, fast heart rate, or feeling anxious or shaky;

  • nerve symptoms in your hands, arms, legs, or feet--numbness, weakness, tingling, burning pain;

  • serious mood or behavior changes--nervousness, confusion, agitation, paranoia, hallucinations, memory problems, trouble concentrating, thoughts of suicide; or

  • signs of tendon rupture--sudden pain, swelling, bruising, tenderness, stiffness, movement problems, or a snapping or popping sound in any of your joints (rest the joint until you receive medical care or instructions).

Also stop using moxifloxacin and call your doctor at once if you have:

  • severe stomach pain, diarrhea that is watery or bloody;

  • fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness (like you might pass out);

  • muscle weakness, breathing problems;

  • a seizure (convulsions);

  • the first sign of any skin rash, no matter how mild;

  • increased pressure inside the skull--severe headaches, ringing in your ears, vision problems, pain behind your eyes; or

  • liver problems--upper stomach pain, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Common side effects may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect moxifloxacin?

Some medicines can make moxifloxacin much less effective when taken at the same time. If you take any of the following medicines, take your moxifloxacin dose 4 hours before or 8 hours after you take the other medicine:

Tell your doctor about all your other medicines, especially:

This list is not complete. Other drugs may interact with moxifloxacin, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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