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Generic Name: delafloxacin
Dosage Forms: Tablets and Injection
Date of Approval: June 19, 2017
Company: Melinta Therapeutics

Treatment for: Acute Bacterial Skin and Skin Structure Infections (ABSSSI)

FDA Approves Baxdela

The U.S. Food and Drug Administration (FDA) has approved intravenous (IV) and oral formulations of Baxdela (delafloxacin), a fluoroquinolone antibacterial active against both gram-positive and gram-negative pathogens (including MRSA) for the treatment of acute bacterial skin and skin structure infections (ABSSSI) in adults.

Important information

Baxdela, a fluoroquinolone antibacterial medicine, can cause serious side effects. Some of these serious side effects can happen at the same time and could result in death. If you get any of the following serious side effects, you should stop treatment and get medical help right away.

  1. Tendon rupture or swelling of the tendon (tendinitis).
    • Tendon problems can happen in people of all ages who take Baxdela. Tendons are tough cords of tissue that connect muscles to bones. Symptoms of tendon problems may include:
      • Pain, swelling, tears and inflammation of tendons including the back of the ankle (Achilles), shoulder, hand, or other tendon sites.
    • The risk of getting tendon problems while you take Baxdela is higher if you:
      • are over 60 years of age
      • are taking steroids (corticosteroids)
      • have had a kidney, heart or lung transplant
    • Tendon problems can also happen in people who do not have the above risk factors. Other reasons that can increase your risk of tendon problems can include:
      • physical activity or exercise
      • kidney failure
      • tendon problems in the past, such as in people with rheumatoid arthritis (RA)
    • Stop treatment immediately and call your healthcare provider right away at the first sign of tendon pain, swelling or inflammation. Stop treamtent until tendinitis or tendon rupture has been ruled out by your healthcare provider. Avoid exercise and using the affected area. The most common area of pain and swelling is in the Achilles tendon at the back of your ankle. This can also happen with other tendons.
    • Talk to your healthcare provider about the risk of tendon rupture with continued use of this medicine. You may need a different antibacterial that is not a fluoroquinolone to treat your infection.
    • Tendon rupture can happen while you are taking or after you have finished taking fluoroquinolone antibacterial medicines. Tendon ruptures can happen within hours or days of taking a fluoroquinolone and have happened up to several months after patients have finished taking their fluoroquinolone.
    • Stop treatment immediately and get medical help right away if you get any of the following signs or symptoms of a tendon rupture:
      • hear or feel a snap or pop in a tendon area
      • bruising right after an injury in a tendon area
      • unable to move the affected area or bear weight
  2. Changes in sensation and possible nerve damage (Peripheral Neuropathy). Damage to the nerves in arms, hands, legs, or feet can happen in people who take fluoroquinolones. Stop treatment immediately and talk to your healthcare provider right away if you get any of the following symptoms of peripheral neuropathy in your arms, hands, legs, or feet:
    • pain
    • burning
    • tingling
    • numbness
    • weakness

    Treatment may need to be stopped to prevent permanent nerve damage.

  3. Central Nervous System (CNS) effects. Seizures have been reported in people who take fluoroquinolone antibacterial medicines. Tell your healthcare provider if you have a history of seizures before you start treatment. CNS side effects may happen as soon as after taking the first dose. Stop treatment immediately and talk to your healthcare provider right away if you get any of these side effects, or other changes in mood or behavior:
    • seizures
    • hear voices, see things, or sense things that are not there (hallucinations)
    • feel restless
    • tremors
    • feel anxious or nervous
    • confusion
    • depression
    • trouble sleeping
    • nightmares
    • feel lightheaded or dizzy
    • feel more suspicious (paranoia)
    • suicidal thoughts or acts
    • headaches that will not go away, with or without blurred vision
  4. Worsening of Myasthenia Gravis (a problem that causes muscle weakness). Fluoroquinolones may cause worsening of myasthenia gravis symptoms, including muscle weakness and breathing problems. Tell your healthcare provider if you have a history of myasthenia gravis before you start treatment. Call your healthcare provider right away if you have any worsening muscle weakness or breathing problems.

What is Baxdela?

Baxdela is a fluoroquinolone antibacterial medicine used to treat certain types of skin infections caused by certain germs called bacteria in adults 18 years or older.

  • It is not known if this medicine is safe and effective in people under 18 years of age, and use in people under 18 years of age is not recommended. Children younger than 18 years of age may have a higher chance of getting bone, joint, and tendon (musculoskeletal) problems while taking fluoroquinolone antibacterial medicines.
  • Sometimes infections are caused by viruses rather than by bacteria. Examples include viral infections in the sinuses and lungs, such as the common cold or flu. Antibacterial medicines do not kill viruses. Call your healthcare provider if you think your condition is not getting better.

Do not take Baxdela if:

  • you have ever had a severe allergic reaction to an antibacterial known as a fluoroquinolone, or if you are allergic to any of the ingredients. Ask your healthcare provider if you are not sure. See the list of ingredients at the end of this page.

What should I tell my healthcare provider before taking Baxdela?

See Important information.

Before you start treatment, tell your healthcare provider about all your medical conditions, including if you:

  • have tendon problems. Baxdela should not be used in patients who have a history of tendon problems.
  • have a disease that causes muscle weakness (myasthenia gravis). Baxdela should not be used in patients who have a history of myasthenia gravis.
  • have central nervous system problems (such as epilepsy).
  • have nerve problems. Baxdela should not be used in patients who have a history of a nerve problem called peripheral neuropathy.
  • have a history of seizures.
  • have kidney problems.
  • have rheumatoid arthritis (RA) or other history of joint problems.
  • are pregnant or planning to become pregnant. It is not known if Baxdela will harm your unborn child.
  • are breast-feeding or planning to breastfeed. It is not known if Baxdela passes into human breast milk. You and your healthcare provider should decide whether you will take Baxdela or breast-feed.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins and herbal and dietary supplements.

Baxdela and other medicines can affect each other causing side effects. Especially tell your healthcare provider if you take:

  • A steroid medicine. Corticosteroids taken by mouth or by injection may increase the chance of tendon injury. See Important information.
  • Certain medicines may keep Baxdela from working correctly. Baxdela Tablets should be taken at least two hours before or six hours after:
    • an antacid, multivitamin, or other product that has magnesium, aluminum, iron, or zinc
    • sucralfate
    • didanosine buffered tablets for oral suspension or the pediatric powder for oral solution

Ask your healthcare provider if you are not sure if any of your medicines are listed above. Know the medicines you take. Keep a list of your medicines and show it to your healthcare provider and pharmacist when you get a new medicine.

How should I take Baxdela?

  • Take Baxdela tablets two times a day exactly as your healthcare provider tells you to take it.
  • If you have kidney problems, talk with your doctor.
  • The tablets can be taken with or without food.
  • Baxdela IV is given to you by intravenous (IV) infusion into your vein slowly, over 60 minutes, as prescribed by your healthcare provider.
  • Do not skip any doses, or stop taking this medicine even if you begin to feel better, until you finish your prescribed treatment, unless you have:
    • tendon problems, nerve problems, or central nervous system problems (see Important information)
    • a serious allergic reaction. See Baxdela side effects, or your healthcare provider tells you to stop.
    Unless you are experiencing any of the harmful side effects listed in this medication guide, take this medicine exactly as your healthcare provider tells you to take it, to help lower the chance that bacteria will become resistant to Baxdela. If this happens, antibacterial medicines may not work in the future.
  • If you miss a dose, take it as soon as you remember up to eight hours before your next dose. If you have less than eight hours before your next dose, wait to take your next dose at your regular time. Do not take more Baxdela to make up for the missed dose.
  • If you take too much, or overdose, call your healthcare provider or get medical help immediately.

What should I avoid while taking Baxdela?

Baxdela can make you feel dizzy and lightheaded. Do not drive, operate machinery, or do other activities that require mental alertness or coordination until you know how it affects you.

Baxdela side effects

Baxdela may cause serious side effects, including:

  • See Important information.
  • Serious allergic reactions. Serious allergic reactions, including death, can happen in people taking fluoroquinolones, including Baxdela, even after only one dose. Stop treatment and get emergency medical help right away if you get any of the following symptoms of a severe allergic reaction:
    • hives
    • swelling of the lips, tongue, face
    • rapid heartbeat
    • skin rash
    • trouble breathing or swallowing
    • throat tightness, hoarseness
    • faint
    Skin rash may happen in people taking fluoroquinolones even after only one dose. Stop taking Baxdela at the first sign of a skin rash and call your healthcare provider. Skin rash may be a sign of a more serious reaction.
  • Clostridium difficile-associated diarrhea (CDAD). CDAD is an infection of your intestines (bowels) that can happen with many antibacterial medicines like Baxdela and may cause mild diarrhea to life-threatening swelling of your intestines (colitis). Call your healthcare provider right away if you get stomach cramps, fever, watery diarrhea, diarrhea that does not go away, or bloody stools. CDAD can happen two or more months after you have finished your antibacterial medicine.

The most common side effects include nausea and diarrhea.

These are not all the possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Side effects (in more detail)

How should I store Baxdela?


  • Store the tablets at room temperature between 68°F to 77°F (20°C to 25°C).
  • Keep the tablets away from moisture (humidity).

Keep all medicines out of the reach of children and pets.

General information about the safe and effective use of Baxdela.

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use this medicine for a condition for which it was not prescribed. Do not give it to other people, even if they have the same symptoms that you have. It may harm them. You can ask your pharmacist or healthcare provider for information that is written for health professionals.

What are the ingredients?

  • Baxdela Tablets: 450 mg

    Active ingredient: 450 mg delafloxacin (equivalent to 649 mg delafloxacin meglumine)

    Inactive ingredients: Citric acid, Crospovidone, Magnesium stearate, Microcrystalline Cellulose, Povidone, Sodium bicarbonate, and Sodium phosphate monobasic, monohydrate.

  • Baxdela for Injection: 300 mg

    Active ingredient: delafloxacin

    Inactive ingredients: Meglumine, beta-cyclodextrin sulfobutyl ether, and EDTA