What is Besifloxacin: Uses, Dosage, Side Effects and More

Besifloxacin is a prescription antibiotic eye drop specifically designed to treat bacterial eye infections. It belongs to a group of medicines called fluoroquinolones, which work by stopping harmful bacteria from growing and multiplying in your eye. This medication is particularly effective against the types of bacteria that commonly cause conjunctivitis, also known as pink eye.

What is Besifloxacin?

Besifloxacin is a topical antibiotic that comes as eye drops for treating bacterial infections of the eye. Unlike many other antibiotics, this medication was specifically developed for eye use, making it highly effective against the bacteria that typically cause eye infections. It's a relatively newer antibiotic that offers targeted treatment with fewer side effects compared to older eye antibiotics.

The medication works by interfering with the bacteria's ability to make essential proteins they need to survive. When bacteria can't produce these proteins, they stop growing and eventually die, allowing your eye infection to clear up. This targeted approach helps your body's natural healing process take over more quickly.

What is Besifloxacin Used For?

Besifloxacin is primarily used to treat bacterial conjunctivitis, commonly called pink eye or red eye. This condition occurs when the thin, clear tissue covering the white part of your eye becomes infected with bacteria. You'll typically notice symptoms like redness, discharge, and irritation that bacterial infections cause.

Your doctor might prescribe this medication when you have specific signs of bacterial infection. These include thick, yellow or green discharge from your eye, crusty eyelids especially in the morning, and persistent redness that doesn't improve on its own. The medication is not effective against viral or allergic conjunctivitis, which require different treatments.

In some cases, doctors may prescribe besifloxacin for other bacterial eye infections beyond conjunctivitis. However, bacterial conjunctivitis remains its most common and well-studied use. Your healthcare provider will determine if this medication is right for your specific type of eye infection.

How Does Besifloxacin Work?

Besifloxacin works by targeting specific enzymes that bacteria need to survive and reproduce. It blocks two important bacterial enzymes called DNA gyrase and topoisomerase IV, which are essential for bacteria to copy their genetic material. Without these enzymes working properly, bacteria cannot multiply or repair themselves.

This medication is considered a strong antibiotic within the fluoroquinolone family. It's particularly effective because it was designed specifically for eye infections, meaning it penetrates eye tissues well and stays active where it's needed most. The dual-target approach makes it harder for bacteria to develop resistance compared to antibiotics that only target one enzyme.

Most people start noticing improvement within 24 to 48 hours of starting treatment. The medication continues working even after you apply it, maintaining effective levels in your eye tissue for several hours. This sustained action helps ensure that bacteria are eliminated completely, reducing the chance of the infection returning.

How Should I Take Besifloxacin?

You should apply besifloxacin eye drops exactly as your doctor prescribes, typically one drop in the affected eye three times daily. The usual treatment schedule is every 4 to 12 hours, depending on your doctor's specific instructions. Always wash your hands thoroughly before and after applying the drops to prevent spreading the infection.

To apply the drops correctly, tilt your head back slightly and pull down your lower eyelid to create a small pocket. Hold the dropper directly over your eye and squeeze gently to release one drop. Avoid touching the dropper tip to your eye or any other surface to keep it sterile. After applying, close your eye gently for about 1 to 2 minutes to help the medication absorb.

You don't need to take this medication with food or water since it's applied directly to your eye. However, if you wear contact lenses, remove them before applying the drops and wait at least 15 minutes before putting them back in. Some doctors recommend avoiding contact lenses entirely during treatment to help your eye heal faster.

If you're using other eye medications, space them at least 5 minutes apart from besifloxacin. This prevents the medications from washing each other out and ensures each one has time to work effectively. Always apply besifloxacin last if you're using multiple eye drops.

How Long Should I Take Besifloxacin For?

Most doctors prescribe besifloxacin for 7 days, which is the standard treatment length for bacterial conjunctivitis. You should continue using the medication for the full prescribed period, even if your symptoms improve after a few days. Stopping too early can allow bacteria to return and may contribute to antibiotic resistance.

Many people notice their symptoms getting better within the first 2 to 3 days of treatment. However, this improvement doesn't mean the infection is completely gone. The bacteria may still be present in smaller numbers, and completing the full course ensures they're eliminated entirely. Think of it like weeding a garden - you need to get all the roots, not just what you see on the surface.

If your symptoms don't improve after 3 days of treatment, or if they get worse, contact your doctor. This might indicate that your infection is caused by bacteria that are resistant to besifloxacin, or that you have a viral infection instead. Your doctor may need to prescribe a different medication or investigate other causes of your symptoms.

What Are the Side Effects of Besifloxacin?

Most people tolerate besifloxacin well, but like all medications, it can cause side effects. The good news is that serious side effects are rare because the medication is applied directly to your eye and very little enters your bloodstream. Understanding what to expect can help you feel more confident about your treatment.

The most common side effects you might experience are mild and usually temporary. These include:

• Temporary burning or stinging when you first apply the drops
• Mild eye irritation or discomfort
• Slight blurred vision immediately after application
• Increased tearing or watery eyes
• Feeling like something is in your eye
• Mild headache

These common side effects typically fade within a few minutes after application and become less noticeable as your eye adjusts to the medication. Most people find they barely notice these effects after the first few doses.

Less common but more concerning side effects require attention from your healthcare provider. Contact your doctor if you experience:

• Severe eye pain or worsening irritation
• Significant vision changes or persistent blurred vision
• Increased redness or swelling around your eye
• New discharge that's different from your original infection
• Rash or hives around your eyes
• Signs of allergic reaction like swelling of your face, lips, or throat

Rare but serious side effects include severe allergic reactions, though these are extremely uncommon with eye drops. If you experience difficulty breathing, severe swelling, or widespread rash, seek emergency medical attention immediately.

Who Should Not Take Besifloxacin?

Besifloxacin is not suitable for everyone, and certain people should avoid this medication entirely. Your doctor will review your medical history to ensure it's safe for you before prescribing it. Being honest about your health conditions and other medications helps prevent potentially dangerous interactions.

You should not use besifloxacin if you're allergic to it or any other fluoroquinolone antibiotics. This includes medications like ciprofloxacin, levofloxacin, moxifloxacin, or ofloxacin. If you've had allergic reactions to any of these medications in the past, make sure your doctor knows before starting treatment.

People with certain medical conditions need special consideration before using this medication:

• History of tendon problems or tendon ruptures with fluoroquinolone use
• Myasthenia gravis (a muscle weakness condition)
• History of seizures or other neurological conditions
• Kidney or liver disease
• Heart rhythm disorders

Pregnancy and breastfeeding require careful consideration. While besifloxacin is applied topically and minimal amounts enter your bloodstream, you should discuss the benefits and risks with your doctor. They can help you weigh whether the benefits of treating your eye infection outweigh any potential risks to your baby.

For children, besifloxacin is generally considered safe for those over 1 year old, but dosing may need adjustment. Your pediatrician will determine the appropriate treatment based on your child's age, weight, and specific condition.

Besifloxacin Brand Names

Besifloxacin is most commonly available under the brand name Besivance. This is the original brand name under which the medication was first approved and marketed. Besivance contains 0.6% besifloxacin suspension, which is the standard concentration for treating bacterial eye infections.

Currently, Besivance is the primary brand name you'll encounter when your doctor prescribes besifloxacin. Generic versions may become available in the future, but as of now, most prescriptions are filled with the brand-name product. Your pharmacist can provide specific information about what's available at your location.

When picking up your prescription, make sure the medication label matches what your doctor prescribed. The bottle should clearly state "besifloxacin ophthalmic suspension" or "Besivance" along with the 0.6% concentration. If you have any questions about the medication you receive, don't hesitate to ask your pharmacist for clarification.

Besifloxacin Alternatives

Several other antibiotic eye drops can treat bacterial conjunctivitis if besifloxacin isn't suitable for you. Your doctor might consider these alternatives based on your specific infection, allergies, or other medical factors. Each alternative has its own benefits and considerations.

Common alternatives include other fluoroquinolone antibiotics like moxifloxacin (Vigamox) and ciprofloxacin (Ciloxan). These medications work similarly to besifloxacin but may have different dosing schedules or side effect profiles. Moxifloxacin, for example, is often prescribed as twice-daily dosing compared to besifloxacin's three-times-daily schedule.

Non-fluoroquinolone options include:

• Erythromycin ointment - particularly useful for newborns and young children
• Polymyxin B/trimethoprim drops (Polytrim) - effective against many common bacteria
• Azithromycin drops (AzaSite) - requires less frequent dosing
• Gentamicin drops - an older but still effective option

Your doctor will choose the best alternative based on several factors including the suspected bacteria causing your infection, your age, pregnancy status, and any allergies you might have. Sometimes they may need to take a culture of your eye discharge to identify the specific bacteria and choose the most effective treatment.

Is Besifloxacin Better Than Moxifloxacin?

Both besifloxacin and moxifloxacin are excellent choices for treating bacterial eye infections, and neither is definitively "better" than the other. The best choice depends on your specific situation, including the type of bacteria causing your infection, your medical history, and your personal preferences regarding dosing frequency.

Besifloxacin offers some unique advantages because it was specifically designed for eye infections. It tends to have excellent penetration into eye tissues and maintains effective levels for extended periods. The medication also targets two different bacterial enzymes, which may make it harder for bacteria to develop resistance. Most people need to use it three times daily for seven days.

Moxifloxacin, on the other hand, has been used longer and has extensive research supporting its effectiveness. It's often prescribed twice daily, which some people find more convenient than three-times-daily dosing. It also has a broader spectrum of activity against certain types of bacteria and may be preferred in some specific situations.

Studies comparing these medications show similar effectiveness rates for treating bacterial conjunctivitis. Your doctor will consider factors like your specific symptoms, any previous antibiotic use, and your lifestyle when choosing between them. Both medications are generally well-tolerated and effective when used as prescribed.