Moxifloxacin Hyd/sod 400/250ml Inj
Overview
What is this medicine?
How to Use This Medicine
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.
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.
Available Forms & Alternatives
Dosing & Administration
Adult Dosing
Condition-Specific Dosing:
Pediatric Dosing
Dose Adjustments
Renal Impairment:
Hepatic Impairment:
Pharmacology
Mechanism of Action
Pharmacokinetics
Absorption:
Distribution:
Elimination:
Pharmacodynamics
Safety & Warnings
BLACK BOX WARNING
Side Effects
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.
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.
Before Using This Medicine
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.
Precautions & Cautions
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.
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
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)
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
Baseline Monitoring
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
Rationale: To correct hypokalemia or hypomagnesemia prior to and during therapy, as these can increase the risk of QT prolongation.
Timing: Prior to initiation
Rationale: For diabetic patients, to assess baseline control due to risk of dysglycemia.
Timing: Prior to initiation
Rationale: To assess baseline organ function, although dose adjustment is generally not required for mild-moderate impairment.
Timing: Prior to initiation
Routine Monitoring
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
Frequency: Regularly, especially in diabetic patients
Target: Individualized
Action Threshold: Significant hyperglycemia or hypoglycemia; adjust antidiabetic therapy or discontinue moxifloxacin
Frequency: Frequently, if co-administered with warfarin
Target: Individualized based on indication
Action Threshold: INR outside therapeutic range; adjust warfarin dose
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
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:
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.
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.
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
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.
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)
Cost & Coverage
General Drug Facts
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.