Levofloxacin (Oral Inhalation)

Adult Medication

Brand Names: Canada



  • This drug may cause very bad side effects. These include irritated or torn tendons; nerve problems in the arms, hands, legs, or feet; and nervous system problems. These side effects can happen alone or at the same time. They can happen within hours to weeks after starting this drug. Some of these side effects may not go away, and may lead to disability or death. Talk with the doctor.
  • The chance of irritated or torn tendons is greater in people over the age of 60; heart, kidney, or lung transplant patients; or people taking steroid drugs. Tendon problems can happen as long as several months after treatment. Call your doctor right away if you have pain, bruising, or swelling in the back of the ankle, shoulder, hand, or other joints. Call you doctor right away if you are not able to move or bear weight on a joint or if you hear or feel a snap or pop.
  • Call your doctor right away if you have signs of nerve problems. These may include not being able to handle heat or cold; change in sense of touch; or burning, numbness, tingling, pain, or weakness in the arms, hands, legs, or feet.
  • Call your doctor right away if you have signs of nervous system problems. These may include anxiety, bad dreams, trouble sleeping, change in eyesight, dizziness, feeling confused, feeling nervous or agitated, feeling restless, hallucinations (seeing or hearing things that are not there), new or worse behavior or mood changes like depression or thoughts of killing yourself, seizures, or very bad headaches.
  • A type of abnormal heartbeat (prolonged QT interval) can happen with this drug. Call your doctor right away if you have a fast heartbeat, a heartbeat that does not feel normal, or if you pass out.
  • Very bad and sometimes deadly allergic reactions have rarely happened with other forms of this drug as well as drugs like this one. Talk with the doctor.
  • This drug has not been used much during pregnancy. There may be a risk of harm to the bones of the unborn baby if this drug is used during pregnancy. If you are pregnant or plan on getting pregnant while taking this drug, talk with your doctor about treatment options.
  • Do not take if you have myasthenia gravis. Very bad and sometimes deadly breathing problems have happened with this drug in people who have myasthenia gravis.

What is this drug used for?

  • It is used to treat cystic fibrosis.

What do I need to tell my doctor BEFORE I take this drug?

  • If you have an allergy to this drug or any part of this drug.
  • If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
  • If you have any of these health problems: Long QT on ECG or low potassium levels.
  • If you have some types of heart problems like slow heartbeat.
  • If you have ever had a heart attack.
  • If you have ever had seizures.
  • If you have kidney disease.
  • If you have ever had any of these health problems: Nerve problems or tendon problems.
  • If you have had tendons get irritated or torn when taking this drug or an alike drug in the past.
  • If you have been taking any drugs to treat a heartbeat that is not normal.
  • If you are taking any drugs that can cause a certain type of heartbeat that is not normal (prolonged QT interval). There are many drugs that can do this. Ask your doctor or pharmacist if you are not sure.
  • If you are breast-feeding or plan to breast-feed.
This is not a list of all drugs or health problems that interact with this drug.
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this drug with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take this drug?

  • Tell all of your health care providers that you take this drug. This includes your doctors, nurses, pharmacists, and dentists.
  • Avoid driving and doing other tasks or actions that call for you to be alert or have clear eyesight until you see how this drug affects you.
  • Have blood work checked as you have been told by the doctor. Talk with the doctor.
  • This drug may affect certain lab tests. Be sure your doctor and lab workers know you use this drug.
  • This drug may affect how much of some other drugs are in your body. If you are taking other drugs, talk with your doctor. You may need to have your blood work checked more closely while taking this drug with your other drugs.
  • If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
  • Tell your doctor if you have signs of high or low blood sugar like breath that smells like fruit, dizziness, fast breathing, fast heartbeat, feeling confused, feeling sleepy, feeling weak, flushing, headache, more thirsty or hungry, passing urine more often, shaking, or sweating.
  • Be careful if you have G6PD deficiency. Anemia may happen.
  • Breathing problems can happen right after taking a dose. If you have breathing problems after using this drug, use a rescue inhaler and talk with your doctor. You may need to use a rescue inhaler before doses of this drug in the future.
  • You may get sunburned more easily. Avoid sun, sunlamps, and tanning beds. Use sunscreen and wear clothing and eyewear that protects you from the sun.
  • If you are over the age of 60, use this drug with care. You could have more side effects.
  • Do not give to a child younger than 18 years of age.
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this drug while you are pregnant.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of kidney problems like unable to pass urine, change in how much urine is passed, blood in the urine, or a big weight gain.
  • Chest pain or pressure, a fast heartbeat, or passing out.
  • A heartbeat that does not feel normal.
  • Feeling of warmth.
  • Tingling.
  • Shortness of breath.
  • Muscle pain or weakness.
  • Feeling very tired or weak.
  • Any unexplained bruising or bleeding.
  • Fever or chills.
  • Ringing in ears.
  • Shakiness.
  • Change in eyesight, eye pain, or very bad eye irritation.
  • Coughing up blood.
  • Liver problems have happened with drugs like this one. Sometimes, this has been deadly. Call your doctor right away if you have signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
  • A very bad skin reaction (Stevens-Johnson syndrome/toxic epidermal necrolysis) may happen. It can cause very bad health problems that may not go away, and sometimes death. Get medical help right away if you have signs like red, swollen, blistered, or peeling skin (with or without fever); red or irritated eyes; or sores in your mouth, throat, nose, or eyes.
  • It is common to have diarrhea when taking this drug. Rarely, a very bad form of diarrhea called Clostridium difficile (C diff)–associated diarrhea (CDAD) may occur. Sometimes, this has led to a deadly bowel problem (colitis). CDAD may happen while you are taking this drug or within a few months after you stop taking it. Call your doctor right away if you have stomach pain or cramps, very loose or watery stools, or bloody stools. Do not try to treat loose stools without first checking with your doctor.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
  • Change in taste.
  • Cough.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to your national health agency.

How is this drug best taken?

Use this drug as ordered by your doctor. Read all information given to you. Follow all instructions closely.
  • You will use by breathing in from the mouth with a special machine (nebulizer). Your doctor will teach you the right way to use.
  • Only use the type of nebulizer that you have been told to use. If you are not sure what type of nebulizer to use, talk with the doctor.
  • Do not mix with any other liquid drugs.
  • Do not mix other drugs in nebulizer.
  • Use right after opening.
  • Throw away any part not used after use.
  • To gain the most benefit, do not miss doses.
  • This drug is clear and yellow.
  • Do not use if solution changes color.
  • Do not use if the solution is cloudy, leaking, or has particles.
  • Follow how to clean carefully.
  • If you are taking more than 1 inhaled drug, talk to your doctor about the best order for taking your drugs.
  • Drink lots of noncaffeine liquids unless told to drink less liquid by your doctor.
  • Take with or without food.

What do I do if I miss a dose?

  • Take a missed dose as soon as you think about it.
  • If it is less than 8 hours until your next dose, skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.

How do I store and/or throw out this drug?

  • Store in the original container at room temperature.
  • Protect from light.
  • After opening the packet, use within 4 days. Throw away any drug in the open packet not used after 4 days, even if some drug is left.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Check with your pharmacist about how to throw out unused drugs.

General drug facts

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else’s drugs.
  • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
  • Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
  • Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Consumer Information Use and Disclaimer

This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using this medicine.

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