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Moxifloxacin Hcl

Moxifloxacin HCl 3ML of 0.5%

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What is Moxifloxacin Hcl?

Moxifloxacin hydrochloride (HCl) is a synthetic broad-spectrum antibacterial agent classified as a fluoroquinolone antibiotic. It is commonly used to treat a variety of bacterial infections including respiratory tract infections, skin infections, and intra-abdominal infections. Moxifloxacin works by inhibiting bacterial DNA gyrase and topoisomerase IV, enzymes essential for bacterial DNA replication, transcription, repair, and recombination.

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What is Moxifloxacin Hcl ?

Moxifloxacin hydrochloride (HCl) is a synthetic broad-spectrum antibacterial agent classified as a fluoroquinolone antibiotic. It is commonly used to treat a variety of bacterial infections including respiratory tract infections, skin infections, and intra-abdominal infections. Moxifloxacin works by inhibiting bacterial DNA gyrase and topoisomerase IV, enzymes essential for bacterial DNA replication, transcription, repair, and recombination.
  • Diarrhea that may contain blood
  • Pain, stiffness, swelling, or bruises around your ankle, leg, shoulder, or other joints
  • Shaking, trembling, sweating, hunger, confusion
  • Seizures, severe headache, unusual thoughts or behaviors, trouble sleeping, feeling anxious, confused, or depressed, seeing, hearing, or feeling things that are not there
  • Change in how much or how often you urinate, cloudy or bloody urine
  • Fainting, dizziness, or lightheadedness
  • Chest pain, fast, slow, or uneven heartbeat
  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Sudden chest, stomach, or back pain, trouble breathing, cough
  • Unusual bleeding, bruising, or weakness
  • Sensitivity of the skin to sunlight, redness or other discoloration of the skin, severe sunburn
  • Dark urine or pale stools, nausea, vomiting, loss of appetite, stomach pain, yellow skin or eyes
  • Numbness, tingling, weakness, or burning pain in your hands, arms, legs, or feet
  • Blistering, peeling, red skin rash
  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, diabetes, heart disease, myasthenia gravis, brain problems, aortic aneurysm (bulge in the wall of the largest artery), or a history of heart rhythm problems (including prolonged QT interval), seizures, or mental illness. Tell your doctor if you have ever had tendon or joint problems, including rheumatoid arthritis, or if you have received a transplant.
  • This medicine may cause the following problems:Tendinitis and tendon rupture (may happen after treatment ends)Nerve damage in the arms or legs, which may become permanentChanges in mood or behavior, seizures, or increased pressure in the headSerious skin reactionsKidney problemsLiver problemsIncreased risk of aortic aneurysmHeart rhythm changesChanges in blood sugar levels
  • This medicine may make you dizzy or lightheaded. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
  • This medicine may make you bleed, bruise, or get infections more easily. Take precautions to prevent illness and injury. Wash your hands often.
  • This medicine can cause diarrhea. Call your doctor if the diarrhea becomes severe, does not stop, or is bloody. Do not take any medicine to stop diarrhea until you have talked to your doctor. Diarrhea can occur 2 months or more after you stop taking this medicine.
  • This medicine may make your skin more sensitive to sunlight. Wear sunscreen. Do not use sunlamps or tanning beds.
  • Call your doctor if your symptoms do not improve or if they get worse.
  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
  • Keep all medicine out of the reach of children. Never share your medicine with anyone.
  • Shaking, trembling, sweating, fast or pounding heartbeat, faintness or lightheadedness, hunger, confusion
  • Yellow skin or eyes
What is moxifloxacin (Avelox) used to treat?
In adults 18 and older, moxifloxacin is FDA-approved for bacterial infections caused by susceptible organisms: community-acquired pneumonia, acute bacterial sinusitis, acute bacterial worsening of chronic bronchitis, uncomplicated and complicated skin and skin-structure infections, complicated intra-abdominal infections, and the treatment and prevention of plague, including pneumonic and septicemic plague. For sinusitis, bronchitis flare-ups, and uncomplicated skin infections, the FDA label says it should be used only when no other treatment options are available, because of the risk of serious side effects. It does not treat viral illnesses such as colds or the flu. The oral and IV brand Avelox is largely discontinued in the U.S., but FDA-approved generic moxifloxacin is available.
Is moxifloxacin a strong antibiotic?
Yes. Moxifloxacin is a broad-spectrum, fourth-generation fluoroquinolone, meaning it is active against a wide range of bacteria. But strength comes with tradeoffs: because of the serious class-wide risks in its boxed warning, the FDA label directs that it be reserved for people with no other treatment option for acute sinusitis, bronchitis flare-ups, and uncomplicated skin infections. Your prescriber decides whether a broad-spectrum drug is truly needed or whether a narrower antibiotic is a better fit.
What are the most serious side effects of moxifloxacin?
The boxed warning covers disabling and potentially irreversible reactions that can occur together: tendinitis and tendon rupture (highest risk over age 60, with corticosteroid use, or after a kidney, heart, or lung transplant), peripheral neuropathy that may be permanent, and central nervous system effects such as seizures, confusion, hallucinations, depression, and suicidal thoughts. It may also worsen muscle weakness in people with myasthenia gravis and should be avoided in them. Other serious risks include QT prolongation and torsades de pointes, liver injury, severe allergic reactions, C. difficile diarrhea, severe low or high blood sugar, sun sensitivity, and a possible increased risk of aortic aneurysm or dissection. Call your doctor right away about tendon pain, numbness or tingling, mood or thinking changes, fainting, or severe diarrhea.
How long does it take for moxifloxacin to work?
Many people start to feel better within the first few days of treatment, but that varies with the type and severity of the infection. Feeling better is not a signal to stop: finish the entire course exactly as prescribed, or the infection can come back and bacteria can become more resistant. If your symptoms are not improving, or they get worse, contact your prescriber rather than waiting it out.
What should you avoid while taking moxifloxacin?
Keep moxifloxacin separate from antacids, sucralfate, multivitamins, and any product containing magnesium, aluminum, iron, zinc, or calcium. Take moxifloxacin 4 hours before or 8 hours after those, or it may not be absorbed properly. Avoid combining it with other medicines that prolong the QT interval, and tell your prescriber if you have known QT prolongation or low potassium. Limit sun and tanning-bed exposure, since moxifloxacin can make your skin more sensitive to sunlight. People with myasthenia gravis should avoid it. Give your doctor and pharmacist your full medication and supplement list before you start.
Is moxifloxacin the same as levofloxacin or ciprofloxacin?
They are not the same drug, but they are all fluoroquinolone antibiotics and they share the same class-wide boxed warnings about tendon problems, nerve damage, central nervous system effects, and worsening of myasthenia gravis. They differ in which bacteria they cover best, in dosing, and in how they are used, so they are not interchangeable. Your prescriber chooses among them based on the infection, your other medications, and your health history.
How much does Moxifloxacin Hcl cost without insurance?
The price of Moxifloxacin Hcl without insurance varies by pharmacy, dosage, and quantity. Rx.com compares cash prices at more than 60,000 US pharmacies so you can find the lowest price near you. Many people save up to 89% off retail prices with a free Rx.com coupon.
What are the common side effects of Moxifloxacin Hcl?
Common side effects of Moxifloxacin Hcl may include: Diarrhea that may contain blood, Pain, stiffness, swelling, or bruises around your ankle, leg, shoulder, or other joints, Shaking, trembling, sweating, hunger, confusion, Seizures, severe headache, unusual thoughts or behaviors, trouble sleeping, feeling anxious, confused, or depressed, seeing, hearing, or feeling things that are not there, Change in how much or how often you urinate, cloudy or bloody urine. This is not a complete list — consult your pharmacist or doctor for full side effect information.
Is there a generic version of Moxifloxacin Hcl?
Generic versions may be available for Moxifloxacin Hcl. Generics contain the same active ingredients as brand-name drugs and are typically 80–90% cheaper. Search Moxifloxacin Hcl on Rx.com to compare generic and brand prices at pharmacies near you.
What is the cheapest pharmacy for Moxifloxacin Hcl?
The cheapest pharmacy for Moxifloxacin Hcl depends on your location and dosage. Rx.com compares prices at CVS, Walgreens, Walmart, Kroger, Costco, and thousands of independent pharmacies. Enter your ZIP code on Rx.com to find the lowest price for Moxifloxacin Hcl near you.

Moxifloxacin Hcl Coupons & Prices

Moxifloxacin HCl 3ML of 0.5%

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Moxifloxacin Hcl Bottle — prescription drug image
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A moxifloxacin coupon from Rx.com can lower what you pay at the pharmacy counter for moxifloxacin hydrochloride, the generic version of the fluoroquinolone antibiotic once sold under the brand name Avelox (the oral and IV brand is largely discontinued in the U.S., but FDA-approved generic tablets are widely available). Even though this generic is usually inexpensive, the cash price can vary a lot from one pharmacy to the next for the very same tablets, which is exactly why comparing is worth the two minutes. Enter your ZIP code above to see today's price for your prescribed strength and quantity across more than 60,000 participating pharmacies, then show the free coupon at the counter. Rx.com is not insurance, and it is not medical advice.

What is moxifloxacin and how does it work?

Moxifloxacin hydrochloride is a broad-spectrum, fourth-generation fluoroquinolone antibiotic. Like other drugs in its class, it works by interfering with the enzymes bacteria need to copy their DNA, which stops the bacteria from multiplying and allows the body to clear the infection. It only works against bacteria, so it will not help with a cold, the flu, or any other viral illness.

In adults 18 and older, the FDA-approved oral and injectable forms are used for bacterial infections caused by susceptible organisms, including community-acquired pneumonia, acute bacterial sinusitis, acute bacterial worsening (exacerbation) of chronic bronchitis, uncomplicated and complicated skin and skin-structure infections, complicated intra-abdominal infections, and the treatment and prevention of plague, including pneumonic and septicemic plague. Importantly, the FDA label says that for acute sinusitis, bronchitis flare-ups, and uncomplicated skin infections, moxifloxacin should be used only when no other treatment options are available, because of the risk of serious side effects. (Moxifloxacin is also sold as an eye drop under the brand names Vigamox and Moxeza; those are a different product with different labeling from the oral tablets covered on this page.)

Moxifloxacin cost without insurance, and how the coupon helps

Because moxifloxacin is available as an FDA-approved generic, it is generally one of the lower-cost options among branded antibiotics, and a typical course is short (usually one tablet a day for several days rather than an ongoing monthly refill). But "generic" does not mean "the same price everywhere." Cash prices for the identical strength and quantity can differ sharply between a chain drugstore, a grocery-store pharmacy, and an independent down the street, since each sets its own cash price. That spread is the single biggest reason to check before you fill.

If you are paying without insurance, or your plan's deductible or copay is higher than the cash price, a free Rx.com discount coupon can bring the counter price down. There is no manufacturer savings card for moxifloxacin, since the U.S. brand is essentially off the market. Enter your ZIP above to see today's price near you, compare across the pharmacies in our network, and bring the coupon (printed or on your phone) to the pharmacist. You cannot combine a discount coupon with insurance on the same fill, so use whichever is cheaper.

Moxifloxacin vs. other antibiotics

Moxifloxacin is a strong, broad-spectrum antibiotic, but stronger is not automatically better. Because of the fluoroquinolone class risks described below, prescribers often reserve it for infections where a narrower antibiotic will not do the job. Other commonly prescribed antibiotics your clinician may consider, depending on the infection and your history, include:

  • Levofloxacin and ciprofloxacin: the other widely used fluoroquinolones. They carry the same class-wide boxed warnings as moxifloxacin, and they differ in which bacteria they cover best.
  • Azithromycin: a macrolide often used for respiratory infections.
  • Doxycycline hyclate: a tetracycline used for respiratory, skin, and tick-borne infections.
  • Amoxicillin and cefdinir: penicillin- and cephalosporin-class antibiotics that are frequently first-line for sinus, ear, and throat infections.

These are not interchangeable. Only your prescriber can decide which antibiotic fits your infection, allergies, and other medications. If you have already been prescribed one of them, you can compare its price on Rx.com the same way.

Safety information you should know

Moxifloxacin carries an FDA boxed warning shared by the fluoroquinolone class: these medicines have been linked to disabling and potentially irreversible serious reactions that can happen together, including tendinitis and tendon rupture (risk is highest in people over 60, those taking corticosteroids, and kidney, heart, or lung transplant recipients), peripheral neuropathy (nerve damage that may be permanent), and central nervous system effects such as seizures, confusion, hallucinations, depression, and suicidal thoughts. The boxed warning also states that moxifloxacin may worsen muscle weakness in people with myasthenia gravis and should be avoided in them. Because of these risks, the label says moxifloxacin should be reserved for people who have no other treatment option for acute bacterial sinusitis, acute bacterial worsening of chronic bronchitis, or uncomplicated skin infections. Stop the medicine and call your doctor right away if you notice tendon pain or swelling, numbness or tingling, or new mood or thinking changes.

Other important risks include QT-interval prolongation and a dangerous heart rhythm called torsades de pointes (avoid combining with other QT-prolonging drugs, and use caution with low potassium or known QT prolongation), liver injury, serious allergic reactions including anaphylaxis, Clostridioides difficile-associated diarrhea, blood-sugar swings including severe low and high blood sugar (especially in people with diabetes taking insulin or a sulfonylurea), sun sensitivity, a possible increased risk of aortic aneurysm or dissection, and joint concerns in children. Separate moxifloxacin from antacids, sucralfate, multivitamins, and anything containing magnesium, aluminum, iron, zinc, or calcium: take moxifloxacin either 4 hours before or 8 hours after those products, or it may not be absorbed. Common side effects are nausea, diarrhea, headache, and dizziness. This page is a summary and is not medical advice; talk with your doctor or pharmacist about your full medication list before starting moxifloxacin.

Sources & accuracy

This Moxifloxacin Hcl information was written and reviewed against authoritative U.S. medical sources — MedlinePlus (U.S. National Library of Medicine), DailyMed, and FDA prescribing information — and checked for accuracy. It is provided for education and is not a substitute for professional medical advice.

Verify the official label: Moxifloxacin Hcl on DailyMed (FDA)

Reviewed against FDA labeling · Last reviewed July 2026

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