Moxifloxacin Hyd/sod 400/250ml Inj

Manufacturer MYLAN Active Ingredient Moxifloxacin Injection(moxs i FLOKS a sin) Pronunciation mox-i-FLOKS-a-sin
WARNING: This drug may cause severe side effects like irritated or torn tendons; nerve problems in the arms, hands, legs, or feet; and nervous system problems. These can happen alone or at the same time. They can happen within hours to weeks after starting this drug. Some of these effects may not go away, and may lead to disability or death.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 your 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 suicide, seizures, or very bad headaches.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.For some health problems, this drug is only for use when other drugs cannot be used or have not worked. Talk with the doctor to be sure that the benefits of this drug are more than the risks. @ COMMON USES: It is used to treat bacterial infections.
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Drug Class
Antibiotic
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Pharmacologic Class
Fluoroquinolone; DNA gyrase inhibitor; Topoisomerase IV inhibitor
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Pregnancy Category
Category C
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FDA Approved
Dec 1999
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Moxifloxacin is an antibiotic used to treat certain serious bacterial infections, such as pneumonia, skin infections, and abdominal infections. It works by stopping the growth of bacteria. It is given as an injection into a vein.
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How to Use This Medicine

To use this medication correctly, follow your doctor's instructions and carefully read all accompanying information. Take this medication exactly as directed, and adhere to all guidelines provided. This drug is administered via infusion into a vein over a specified period of time.

For storage and disposal, consult with your doctor, nurse, or pharmacist to determine the best approach if you need to keep this medication at home.

If you miss a dose, contact your doctor immediately to receive guidance on the next steps to take.
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Lifestyle & Tips

  • Stay well-hydrated during treatment.
  • Avoid excessive exposure to sunlight or artificial UV light (tanning beds) as this medication can make your skin more sensitive to light. Use sunscreen and wear protective clothing.
  • Do not drive or operate machinery if you experience dizziness, lightheadedness, or confusion.

Dosing & Administration

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Adult Dosing

Standard Dose: 400 mg intravenously once daily
Dose Range: 400 - 400 mg

Condition-Specific Dosing:

Community-acquired pneumonia (CAP): 400 mg IV once daily for 7-14 days
Complicated skin and skin structure infections (cSSSI): 400 mg IV once daily for 7-21 days
Complicated intra-abdominal infections (cIAI): 400 mg IV once daily for 5-14 days
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Pediatric Dosing

Neonatal: Not established (generally not recommended due to risk of arthropathy)
Infant: Not established (generally not recommended due to risk of arthropathy)
Child: Not established (generally not recommended due to risk of arthropathy)
Adolescent: Not established (generally not recommended due to risk of arthropathy)
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Dose Adjustments

Renal Impairment:

Mild: No dose adjustment needed
Moderate: No dose adjustment needed
Severe: No dose adjustment needed
Dialysis: No dose adjustment needed for hemodialysis or continuous ambulatory peritoneal dialysis (CAPD)

Hepatic Impairment:

Mild: No dose adjustment needed
Moderate: No dose adjustment needed
Severe: Not studied in patients with severe hepatic impairment (Child-Pugh C); use with caution if at all.

Pharmacology

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Mechanism of Action

Moxifloxacin is a fluoroquinolone antibacterial agent that inhibits bacterial DNA gyrase (topoisomerase II) and topoisomerase IV. These enzymes are essential for bacterial DNA replication, transcription, repair, and recombination. Inhibition of these enzymes leads to DNA strand breaks and bacterial cell death.
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Pharmacokinetics

Absorption:

Bioavailability: Not applicable for IV formulation (100% for IV)
Tmax: End of infusion (for IV)
FoodEffect: Not applicable for IV formulation

Distribution:

Vd: 1.7-2.7 L/kg
ProteinBinding: Approximately 50%
CnssPenetration: Limited, but achieves therapeutic concentrations in CSF in some inflammatory conditions

Elimination:

HalfLife: Approximately 12 hours
Clearance: Not available (systemic clearance approx. 12 L/hr)
ExcretionRoute: Renal (approximately 20% unchanged) and fecal/biliary (approximately 25% unchanged)
Unchanged: Approximately 45% (20% renal, 25% fecal)
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Pharmacodynamics

OnsetOfAction: Rapid (within minutes of infusion)
PeakEffect: End of infusion
DurationOfAction: 24 hours (due to once-daily dosing and long half-life)
Confidence: Medium

Safety & Warnings

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BLACK BOX WARNING

Fluoroquinolones, including moxifloxacin, are associated with disabling and potentially irreversible serious adverse reactions that have occurred together, including tendinitis and tendon rupture, peripheral neuropathy, and central nervous system effects. Discontinue moxifloxacin immediately and avoid use of fluoroquinolones in patients who experience any of these serious adverse reactions. Fluoroquinolones may exacerbate muscle weakness in patients with myasthenia gravis. Avoid moxifloxacin in patients with a known history of myasthenia gravis. Because these serious adverse reactions can be disabling, moxifloxacin should be reserved for use in patients who have no alternative treatment options for community-acquired pneumonia, complicated skin and skin structure infections, and complicated intra-abdominal infections.
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Side Effects

Urgent Side Effects: Seek Medical Help Immediately

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical attention right away:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin (with or without fever)
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of kidney problems, including:
+ Inability to pass urine
+ Changes in urine output
+ Blood in the urine
+ Sudden weight gain
Signs of liver problems, such as:
+ Dark urine
+ Fatigue
+ Decreased appetite
+ Upset stomach or stomach pain
+ Light-colored stools
+ Vomiting
+ Yellow skin or eyes
Signs of high or low blood sugar, including:
+ Fruity-smelling breath
+ Dizziness
+ Rapid breathing
+ Rapid heartbeat
+ Confusion
+ Sleepiness
+ Weakness
+ Flushing
+ Headache
+ Unusual thirst or hunger
+ Frequent urination
+ Shaking
+ Sweating
Chest pain or pressure
Fever, chills, or sore throat
Unexplained bruising or bleeding
Feeling extremely tired or weak
Shortness of breath
Shakiness
Difficulty walking
Vaginal itching or discharge
White patches in the mouth
Muscle pain or weakness
Difficulty focusing
Memory problems or loss
A severe skin reaction (Stevens-Johnson syndrome/toxic epidermal necrolysis), which can cause:
+ Red, swollen, blistered, or peeling skin (with or without fever)
+ Red or irritated eyes
+ Sores in the mouth, throat, nose, or eyes
Diarrhea, especially if it is severe, bloody, or watery (a condition known as C. diff-associated diarrhea, or CDAD, may occur)
Abnormal heartbeat (prolonged QT interval), which can cause:
+ Rapid heartbeat
+ Irregular heartbeat
+ Fainting
A rare but severe problem with the main blood vessel that comes out of the heart (aorta), which can cause:
+ Sudden, severe pain in the stomach, chest, or back

Other Possible Side Effects

Most people do not experience severe side effects, and some may only have minor side effects. However, if you notice any of the following side effects or any other unusual symptoms, contact your doctor or seek medical attention:

Upset stomach
Diarrhea

Reporting Side Effects

If you have questions about side effects or experience any unusual symptoms, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • New or worsening pain, swelling, or bruising around a joint (especially ankle, heel, shoulder, elbow, wrist, or hand) - could be tendon problems.
  • Numbness, tingling, burning, or weakness in your arms or legs - could be nerve damage.
  • Confusion, hallucinations, seizures, or severe dizziness - could be central nervous system effects.
  • Severe or watery diarrhea, fever, or stomach cramps - could be a serious bowel infection (C. difficile).
  • Sudden chest, back, or abdominal pain - could be an aortic aneurysm or dissection.
  • Any new or worsening muscle weakness, especially if you have myasthenia gravis.
  • Signs of an allergic reaction: rash, hives, swelling of face/lips/tongue, difficulty breathing.
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following conditions to ensure safe treatment:

Any allergies you have, including allergies to this medication, its components, or other substances. Describe the allergic reaction and its symptoms.
Certain health conditions, such as:
+ Abnormal heartbeat patterns (Long QTc on ECG) or other irregular heart rhythms
+ Slow heartbeat
+ Low potassium or magnesium levels
+ Recent heart attack
+ Nerve problems or tendon problems (including a history of tendon irritation or tears)
If you have or are at risk for an aortic aneurysm (a bulging or ballooning of the aorta, the main blood vessel that carries blood from the heart). This includes conditions like:
+ Other blood vessel problems
+ High blood pressure
+ Certain genetic disorders, such as Marfan syndrome or Ehlers-Danlos syndrome
If you are taking medications to treat abnormal heart rhythms or other drugs that can cause prolonged QT intervals (a specific type of irregular heartbeat). Your doctor or pharmacist can help you identify these medications.
* All your current medications, including prescription and over-the-counter drugs, natural products, and vitamins. This is crucial to avoid potential interactions and ensure safe treatment.

Remember to consult your doctor before starting, stopping, or changing the dose of any medication. It is your responsibility to verify that it is safe to take this medication with all your other medications and health conditions.
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Precautions & Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Before engaging in activities that require alertness, such as driving, wait until you understand how this drug affects you.

Regularly monitor your blood work and other laboratory tests as directed by your doctor. Some individuals may also require electrocardiogram (ECG) checks to monitor their heart rhythm. Be aware that medications like this one can cause fluctuations in blood sugar levels, leading to high or low blood sugar. Low blood sugar has primarily occurred in people with diabetes who are taking medications that lower blood sugar, such as insulin. In severe cases, very low blood sugar can result in coma or even death. Adhere to your doctor's instructions for checking your blood sugar levels.

Do not exceed the prescribed duration of treatment, as this may increase the risk of a second infection. Additionally, be cautious when exposed to the sun, as you may be more susceptible to sunburn. Avoid direct sunlight, sunlamps, and tanning beds, and use protective measures such as sunscreen, clothing, and eyewear to minimize your risk.

Unless otherwise advised by your doctor, drink plenty of non-caffeinated liquids to stay hydrated. Although rare, this medication can cause severe and potentially life-threatening side effects, including muscle or joint problems, kidney or liver damage, blood disorders, and other complications. If you have concerns or questions, discuss them with your doctor.

If you are over 60 years old, use this medication with caution, as you may be more prone to side effects. This medication is not approved for use in children, as it may increase the risk of joint and tendon problems. However, your child's doctor may determine that the benefits of treatment outweigh the risks. If you have questions about giving this medication to your child, consult with their doctor.

If you are pregnant, plan to become pregnant, or are breastfeeding, inform your doctor. It is crucial to discuss the potential benefits and risks of this medication to both you and your baby.
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Overdose Information

Overdose Symptoms:

  • QT prolongation
  • CNS effects (e.g., seizures, confusion)
  • Nausea
  • Vomiting

What to Do:

In case of overdose, contact a poison control center immediately (e.g., 1-800-222-1222 in the US) or seek emergency medical attention. Treatment is supportive; monitor ECG and vital signs. Hemodialysis or peritoneal dialysis are not effective in removing moxifloxacin.

Drug Interactions

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Major Interactions

  • Class IA antiarrhythmics (e.g., quinidine, procainamide)
  • Class III antiarrhythmics (e.g., amiodarone, sotalol)
  • Other drugs known to prolong the QT interval (e.g., cisapride, erythromycin, antipsychotics, tricyclic antidepressants)
  • Corticosteroids (increased risk of tendon rupture)
  • Warfarin (may enhance anticoagulant effect, increased INR)
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Moderate Interactions

  • NSAIDs (increased risk of CNS stimulation and convulsive seizures)
  • Antidiabetic agents (sulfonylureas, insulin - risk of dysglycemia)
  • Sucralfate, antacids containing magnesium or aluminum, iron, zinc, multivitamins (oral forms - reduced absorption of moxifloxacin, though less relevant for IV)

Monitoring

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Baseline Monitoring

Electrocardiogram (ECG)

Rationale: To assess baseline QTc interval, especially in patients with known QT prolongation, uncorrected hypokalemia, or on other QT-prolonging drugs.

Timing: Prior to initiation

Electrolytes (Potassium, Magnesium)

Rationale: To correct hypokalemia or hypomagnesemia prior to and during therapy, as these can increase the risk of QT prolongation.

Timing: Prior to initiation

Blood Glucose

Rationale: For diabetic patients, to assess baseline control due to risk of dysglycemia.

Timing: Prior to initiation

Renal and Hepatic Function Tests

Rationale: To assess baseline organ function, although dose adjustment is generally not required for mild-moderate impairment.

Timing: Prior to initiation

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Routine Monitoring

Electrocardiogram (ECG)

Frequency: Periodically, especially if risk factors for QT prolongation develop or persist

Target: QTc < 450 ms (men), < 470 ms (women)

Action Threshold: Discontinue if QTc prolongation > 500 ms or > 60 ms increase from baseline

Blood Glucose

Frequency: Regularly, especially in diabetic patients

Target: Individualized

Action Threshold: Significant hyperglycemia or hypoglycemia; adjust antidiabetic therapy or discontinue moxifloxacin

INR (International Normalized Ratio)

Frequency: Frequently, if co-administered with warfarin

Target: Individualized based on indication

Action Threshold: INR outside therapeutic range; adjust warfarin dose

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Symptom Monitoring

  • Tendon pain, swelling, inflammation, or rupture (especially Achilles, shoulder, hand)
  • Numbness, tingling, burning, pain, or weakness (signs of peripheral neuropathy)
  • Dizziness, lightheadedness, confusion, hallucinations, seizures (CNS effects)
  • Severe diarrhea, abdominal pain, fever (Clostridioides difficile-associated diarrhea)
  • Rash, itching, swelling (allergic reaction)
  • Chest pain, shortness of breath, back pain (aortic aneurysm/dissection symptoms)
  • Muscle weakness, difficulty breathing (exacerbation of myasthenia gravis)

Special Patient Groups

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Pregnancy

Moxifloxacin is Pregnancy Category C. Animal studies have shown adverse effects on fetal development (e.g., skeletal abnormalities, reduced fetal weight). Use during pregnancy only if the potential benefit justifies the potential risk to the fetus, and if no safer alternative is available.

Trimester-Specific Risks:

First Trimester: Potential for teratogenic effects observed in animal studies.
Second Trimester: Potential for arthropathy in the fetus, though human data are limited.
Third Trimester: Potential for arthropathy in the fetus, though human data are limited.
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Lactation

Moxifloxacin is excreted into human breast milk. Due to the potential for serious adverse reactions in the breastfed infant (e.g., arthropathy, GI disturbances, alteration of gut flora), a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

Infant Risk: Risk L3 (Moderately safe, but caution advised). Potential for arthropathy, GI upset, and alteration of gut flora in the infant. Monitor infant for diarrhea, candidiasis, and developmental joint issues.
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Pediatric Use

Generally not recommended for use in pediatric patients (<18 years of age) due to the risk of irreversible arthropathy (cartilage damage) observed in juvenile animals. Use only when the benefits outweigh the risks and there are no alternative treatment options.

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Geriatric Use

Elderly patients are at increased risk for severe tendon disorders (including rupture), QT prolongation, and aortic aneurysm/dissection. Monitor closely for these adverse effects. No dose adjustment is needed based solely on age, but consider overall health status and comorbidities.

Clinical Information

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Clinical Pearls

  • Administer moxifloxacin IV infusion slowly over 60 minutes to minimize the risk of infusion-related reactions (e.g., local irritation, transient dizziness).
  • Ensure adequate hydration to prevent crystalluria, although this is less common with moxifloxacin than some other fluoroquinolones.
  • Educate patients thoroughly about the Black Box Warnings, especially symptoms of tendon rupture, peripheral neuropathy, and CNS effects, and advise them to seek immediate medical attention if these occur.
  • Moxifloxacin has excellent tissue penetration, including lung, skin, and intra-abdominal tissues.
  • It has activity against a broad spectrum of bacteria, including atypical pathogens (e.g., Mycoplasma, Chlamydia, Legionella) and many anaerobes, making it useful for polymicrobial infections.
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Alternative Therapies

  • Levofloxacin (another respiratory fluoroquinolone)
  • Ciprofloxacin (another fluoroquinolone, less active against S. pneumoniae and anaerobes)
  • Beta-lactam antibiotics (e.g., ceftriaxone, amoxicillin/clavulanate)
  • Macrolides (e.g., azithromycin, clarithromycin)
  • Tetracyclines (e.g., doxycycline)
  • Clindamycin (for anaerobic coverage)
  • Carbapenems (e.g., ertapenem, imipenem/cilastatin, meropenem - for broader spectrum)
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Cost & Coverage

Average Cost: Varies widely, typically $50-$200 per 400mg IV dose per 400mg/250ml IV bag
Generic Available: Yes
Insurance Coverage: Tier 2 or 3 (for generic), Tier 3 or 4 (for brand)
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General Drug Facts

If your symptoms or health problems persist or worsen, it is essential to contact your doctor promptly. To ensure safe use, never share your medication with others, and do not take medication prescribed for someone else. Store all medications in a secure location, out of reach of children and pets, to prevent accidental ingestion. Dispose of unused or expired medications properly. Unless instructed to do so by a healthcare professional, do not flush medications down the toilet or drain. If you are unsure about the correct disposal method, consult your pharmacist, who can also inform you about potential drug take-back programs in your area.

This medication is accompanied by a Medication Guide, a patient fact sheet that provides crucial information. It is important to read this guide carefully and review it again each time your prescription is refilled. If you have any questions or concerns about your medication, do not hesitate to discuss them with your doctor, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately contact your local poison control center or seek emergency medical attention. Be prepared to provide detailed information about the overdose, including the medication taken, the quantity, and the time it occurred.