Amox-Clav XR 1000/62.5mg Tablets

Manufacturer SANDOZ Active Ingredient Amoxicillin and Clavulanate Extended-Release Tablets(a moks i SIL in & klav yoo LAN ate) Pronunciation a-moks-i-SIL-in & klav-yoo-LAN-ate
It is used to treat bacterial infections.
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Drug Class
Antibiotic
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Pharmacologic Class
Penicillins; Beta-lactamase inhibitors
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Pregnancy Category
Category B
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FDA Approved
May 2001
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

This medication is an antibiotic used to treat certain bacterial infections, such as sinus infections and pneumonia. It contains two active ingredients: amoxicillin, which kills bacteria, and clavulanate, which helps amoxicillin work better by protecting it from bacterial defenses.
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How to Use This Medicine

Taking Your Medication

To use this medication correctly, follow your doctor's instructions and read all the information provided. Take the tablet with food, but avoid taking it with high-fat meals. Swallow the tablet whole; do not chew or crush it. However, some products may be broken in half - if you're unsure, consult your doctor. Continue taking this medication as directed by your doctor or healthcare provider, even if you're feeling well.

Storing and Disposing of Your Medication

Store this medication at room temperature in a dry place, avoiding bathrooms. Keep all medications in a safe location, out of the reach of children and pets. Dispose of unused or expired medications properly. Do not flush them down the toilet or pour them down the drain unless instructed to do so. If you have questions about disposal, consult your pharmacist. You may also want to check if there are drug take-back programs in your area.

Missing a Dose

If you miss a dose, take it as soon as you remember. However, if it's close to the time for your next dose, skip the missed dose and resume your regular schedule. Do not take two doses at the same time or take extra doses.
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Lifestyle & Tips

  • Take this medication exactly as prescribed by your doctor. Do not skip doses or stop taking it early, even if you feel better, as this can lead to antibiotic resistance.
  • Take this medication at the start of a meal to reduce stomach upset.
  • Swallow the extended-release tablets whole. Do not crush, chew, or break them.
  • This medication is for bacterial infections only and will not work for viral infections like the common cold or flu.
  • Stay hydrated by drinking plenty of fluids while taking this medication.

Dosing & Administration

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Adult Dosing

Standard Dose: 2 tablets (2000 mg amoxicillin/125 mg clavulanate) orally once daily for 7 to 10 days
Dose Range: 7 - 10 mg

Condition-Specific Dosing:

Acute Bacterial Sinusitis: 2 tablets (2000 mg amoxicillin/125 mg clavulanate) orally once daily for 10 days
Community-Acquired Pneumonia: 2 tablets (2000 mg amoxicillin/125 mg clavulanate) orally once daily for 7 to 10 days
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Not recommended for pediatric patients under 16 years of age due to the high clavulanate content relative to amoxicillin and lack of specific pediatric dosing for the extended-release formulation.
Adolescent: Not recommended for pediatric patients under 16 years of age.
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Dose Adjustments

Renal Impairment:

Mild: No adjustment needed (CrCl > 30 mL/min)
Moderate: Not recommended (CrCl 10-30 mL/min) due to the extended-release formulation and fixed ratio of amoxicillin to clavulanate. Alternative formulations or antibiotics should be considered.
Severe: Contraindicated (CrCl < 30 mL/min) and in patients on hemodialysis.
Dialysis: Contraindicated in patients on hemodialysis.

Hepatic Impairment:

Mild: Use with caution; monitor liver function.
Moderate: Use with caution; monitor liver function.
Severe: Use with caution; monitor liver function. Not recommended in patients with a history of cholestatic jaundice/hepatic dysfunction associated with amoxicillin/clavulanate.

Pharmacology

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Mechanism of Action

Amoxicillin is a beta-lactam antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), leading to bacterial lysis and death. Clavulanate potassium is a beta-lactamase inhibitor that protects amoxicillin from degradation by beta-lactamase enzymes produced by resistant bacteria, thereby extending the antibacterial spectrum of amoxicillin.
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Pharmacokinetics

Absorption:

Bioavailability: Approximately 90% for amoxicillin, 60% for clavulanate
Tmax: Amoxicillin: 1.5 hours (IR), 2.5 hours (XR); Clavulanate: 1 hour (IR), 2 hours (XR)
FoodEffect: Absorption is optimized when taken at the start of a meal to minimize gastrointestinal intolerance.

Distribution:

Vd: Amoxicillin: 0.3-0.4 L/kg; Clavulanate: 0.2 L/kg
ProteinBinding: Amoxicillin: 17-20%; Clavulanate: 22-30%
CnssPenetration: Limited (unless meninges are inflamed)

Elimination:

HalfLife: Amoxicillin: 1.3 hours; Clavulanate: 1 hour (for both, but XR formulation provides sustained release)
Clearance: Renal clearance is primary route for amoxicillin; both renal and non-renal for clavulanate.
ExcretionRoute: Renal (primarily glomerular filtration and tubular secretion)
Unchanged: Amoxicillin: 60-80%; Clavulanate: 25-45%
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Pharmacodynamics

OnsetOfAction: Rapid (within 1 hour)
PeakEffect: Within 2-3 hours (for XR formulation)
DurationOfAction: Sustained release provides once-daily dosing for 24 hours.

Safety & Warnings

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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

Although rare, this medication can cause severe and potentially life-threatening side effects. If you experience any of the following symptoms, contact your doctor or seek medical attention immediately:

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 drug-induced enterocolitis syndrome, a type of allergic reaction, such as:
+ Vomiting within 1 to 4 hours after taking this medication
+ Diarrhea within 24 hours after taking this medication
+ Pale or gray skin
+ Feeling tired or unwell
+ Signs of low blood pressure, such as severe dizziness or passing out
Vaginal irritation or discharge
Fever or chills
Unexplained bruising or bleeding
Diarrhea, especially if it is severe, bloody, or accompanied by stomach pain or cramps (see below for more information on diarrhea)
Signs of liver problems, such as:
+ Dark urine
+ Tiredness
+ Decreased appetite
+ Upset stomach or stomach pain
+ Light-colored stools
+ Vomiting
+ Yellow skin or eyes
Severe skin reactions, including:
+ Stevens-Johnson syndrome (SJS)
+ Toxic epidermal necrolysis (TEN)
+ Other serious reactions, which can affect body organs and be life-threatening
+ Signs of these reactions may include:
- Red, swollen, blistered, or peeling skin
- Red or irritated eyes
- Sores in the mouth, throat, nose, eyes, genitals, or any areas of skin
- Fever
- Chills
- Body aches
- Shortness of breath
- Swollen glands

Diarrhea: Important Information

Diarrhea is a common side effect of antibiotics, but in rare cases, it can be severe and lead to a life-threatening condition called C. diff-associated diarrhea (CDAD). If you experience stomach pain, cramps, or very loose, watery, or bloody stools, contact your doctor right away. Do not treat diarrhea without consulting your doctor first.

Other Side Effects

Like all medications, this drug can cause side effects, although not everyone will experience them. If you have any of the following side effects or any other concerns, contact your doctor:

For all patients taking this medication:
+ Diarrhea
+ Upset stomach
+ Vomiting
For children:
+ Diaper rash

Reporting Side Effects

If you have questions or concerns about side effects, 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:

  • Seek immediate medical attention if you experience signs of a severe allergic reaction: rash, hives, itching, swelling of the face, lips, tongue, or throat, or difficulty breathing.
  • Contact your doctor if you develop severe or watery diarrhea, especially if it's persistent or contains blood or mucus, as this could be a sign of a serious intestinal infection (C. difficile).
  • Report any yellowing of the skin or eyes (jaundice), dark urine, pale stools, or unusual fatigue, as these can be signs of liver problems.
  • Report any new or worsening symptoms.
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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:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction and its symptoms.
If you are allergic to penicillin.
If you have kidney disease or any history of kidney problems.
If you have experienced liver problems or jaundice (turned yellow) while taking this medication in the past.
If you have been diagnosed with mononucleosis (mono).
If you are currently taking probenecid.

This list is not exhaustive, and it is crucial to discuss all your medications, including prescription and over-the-counter drugs, natural products, and vitamins, with your doctor and pharmacist. They will help you determine if it is safe to take this medication with your existing health conditions and other medications. Never start, stop, or adjust the dosage of any medication without consulting your doctor first.
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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. If you are taking this drug for an extended period, your doctor may recommend regular blood tests to monitor your condition.

This medication may interfere with certain laboratory tests, so it is crucial to notify all your healthcare providers and lab personnel that you are taking this drug. If you have diabetes and test your urine glucose levels, consult with your doctor to determine the most suitable tests to use.

Do not take this medication for longer than prescribed, as this may increase the risk of a second infection.

A possible side effect of this medication is a change in tooth color, which may appear as yellow, gray, or brown. This has been reported primarily in children, but in most cases, the discoloration lessened or disappeared after brushing or dental cleaning. If you notice any changes in tooth color, consult your doctor.

When taking this medication, birth control pills and other hormone-based birth control methods may be less effective in preventing pregnancy. To minimize the risk of unplanned pregnancy, consider using an additional form of birth control, such as a condom, while taking this drug.

If you are pregnant, planning to become pregnant, or breastfeeding, it is essential to discuss the potential benefits and risks of this medication with your doctor to ensure the best possible outcome for you and your baby.
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Overdose Information

Overdose Symptoms:

  • Gastrointestinal symptoms (e.g., abdominal pain, vomiting, diarrhea)
  • Electrolyte imbalance
  • Renal impairment (crystalluria, renal failure)
  • Convulsions (rare)

What to Do:

Call 1-800-222-1222 (Poison Control Center) immediately or seek emergency medical attention. Treatment is generally supportive and symptomatic. Hemodialysis may be used to remove amoxicillin and clavulanate from circulation.

Drug Interactions

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Contraindicated Interactions

  • Patients with a history of cholestatic jaundice/hepatic dysfunction associated with amoxicillin/clavulanate.
  • Patients with severe renal impairment (CrCl < 30 mL/min) or on hemodialysis.
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Major Interactions

  • Warfarin (increased INR/bleeding risk)
  • Methotrexate (increased methotrexate toxicity due to reduced renal clearance)
  • Allopurinol (increased incidence of rash)
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Moderate Interactions

  • Oral Contraceptives (theoretical reduction in efficacy due to altered gut flora)
  • Probenecid (increases and prolongs amoxicillin blood levels by decreasing renal tubular secretion)
  • Mycophenolate mofetil (reduced mycophenolic acid concentration)

Monitoring

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Baseline Monitoring

History of hypersensitivity reactions to penicillins, cephalosporins, or other allergens

Rationale: To prevent severe allergic reactions (e.g., anaphylaxis).

Timing: Prior to initiation of therapy.

Renal function (CrCl)

Rationale: To determine appropriate dosing and assess contraindications for XR formulation.

Timing: Prior to initiation of therapy, especially in elderly or those with suspected renal impairment.

Hepatic function (ALT, AST, bilirubin)

Rationale: To assess baseline liver status, especially in patients with pre-existing hepatic impairment or history of drug-induced liver injury.

Timing: Prior to initiation of therapy, if clinically indicated.

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Routine Monitoring

Clinical response to therapy (e.g., resolution of fever, improvement of symptoms)

Frequency: Daily

Target: Resolution of infection symptoms

Action Threshold: Lack of improvement or worsening symptoms may indicate treatment failure, resistance, or alternative diagnosis.

Signs and symptoms of superinfection (e.g., oral thrush, vaginal candidiasis, new onset diarrhea)

Frequency: Daily

Target: Absence of new infections

Action Threshold: Development of new infections requires evaluation and potential discontinuation or change of therapy.

Liver function tests (ALT, AST, bilirubin)

Frequency: Periodically, if therapy is prolonged or in patients with pre-existing hepatic impairment

Target: Within normal limits or stable

Action Threshold: Significant elevation may require discontinuation.

Renal function tests (BUN, creatinine)

Frequency: Periodically, if therapy is prolonged or in patients with pre-existing renal impairment

Target: Within normal limits or stable

Action Threshold: Significant changes may require discontinuation or alternative therapy.

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Symptom Monitoring

  • Skin rash, itching, hives (signs of allergic reaction)
  • Swelling of face, lips, tongue, or throat (angioedema)
  • Difficulty breathing (anaphylaxis)
  • Severe or persistent diarrhea, abdominal pain, fever (Clostridioides difficile-associated diarrhea)
  • Yellowing of skin or eyes (jaundice), dark urine, unusual fatigue (hepatic dysfunction)
  • Nausea, vomiting, abdominal pain

Special Patient Groups

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Pregnancy

Amoxicillin/clavulanate is generally considered safe for use during pregnancy (Pregnancy Category B). Studies in animals have not shown harm to the fetus, and human data do not suggest an increased risk of birth defects. However, it should only be used if clearly needed.

Trimester-Specific Risks:

First Trimester: No increased risk of major birth defects observed.
Second Trimester: Generally considered safe.
Third Trimester: Generally considered safe. There is a theoretical risk of necrotizing enterocolitis in neonates exposed to clavulanate in utero, but data are limited.
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Lactation

Amoxicillin and clavulanate are excreted in small amounts into breast milk. Generally considered compatible with breastfeeding (Lactation Risk L1).

Infant Risk: Low risk. Potential for mild gastrointestinal upset (e.g., diarrhea, candidiasis) in the breastfed infant. Monitor infant for rash or diarrhea.
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Pediatric Use

The extended-release formulation (1000/62.5 mg tablet) is not recommended for pediatric patients under 16 years of age due to the high clavulanate content relative to amoxicillin and lack of specific pediatric dosing for this formulation. Other formulations (e.g., suspensions, chewable tablets) are available for pediatric use.

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Geriatric Use

No overall differences in safety or effectiveness have been observed between elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out. Dose selection should be cautious, generally starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and concomitant disease or other drug therapy. Renal function should be monitored, and dose adjusted if necessary, as amoxicillin is substantially excreted by the kidney.

Clinical Information

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Clinical Pearls

  • Always take Amox-Clav XR at the start of a meal to enhance absorption and minimize gastrointestinal side effects.
  • Swallow the tablets whole; do not crush, chew, or break them, as this will disrupt the extended-release mechanism.
  • This extended-release formulation is specifically designed for once-daily dosing and is typically used for more severe or resistant infections like community-acquired pneumonia or acute bacterial sinusitis.
  • Emphasize the importance of completing the full course of therapy, even if symptoms improve, to prevent the development of antibiotic resistance.
  • Counsel patients on the potential for C. difficile-associated diarrhea, which can occur during or even several weeks after antibiotic therapy.
  • Not suitable for patients with severe renal impairment (CrCl < 30 mL/min) or on hemodialysis due to the fixed ratio and extended-release properties.
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Alternative Therapies

  • Respiratory fluoroquinolones (e.g., Levofloxacin, Moxifloxacin) for CAP or sinusitis in specific cases.
  • Macrolides (e.g., Azithromycin, Clarithromycin) for atypical pathogens or in penicillin-allergic patients.
  • Cephalosporins (e.g., Cefpodoxime, Cefuroxime) for respiratory tract infections.
  • Doxycycline for certain respiratory infections.
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Cost & Coverage

Average Cost: $100 - $300 per 30 tablets
Generic Available: Yes
Insurance Coverage: Tier 2 or Tier 3 (preferred brand or non-preferred brand, depending on plan)
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General Drug Facts

If your symptoms or health issues persist or worsen, it is essential to contact your doctor promptly. To ensure safe and effective treatment, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so it's a good idea to check with your pharmacist for more information. If you have any questions or concerns about this medication, don't hesitate to discuss them with your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When seeking help, be prepared to provide detailed information about the overdose, including the medication taken, the amount, and the time it occurred.