Cefuroxime Pediatric Dose Calculator
Use this cefuroxime pediatric dose calculator by weight to turn the prescribed mg/kg into mL of cefuroxime axetil suspension, given with food. Suspension and tablets are not interchangeable mg-for-mg.
Cefuroxime oral suspension, 3 months to 12 years: 20 mg/kg per day for strep throat (max 500 mg per day) or 30 mg/kg per day for ear infection, sinusitis or impetigo (max 1 g per day), every 12 hours with food. Suspension is no longer sold in the US; tablets are dosed differently. Enter weight for the mL on your bottle; give the dose your child's prescriber ordered.
cefuroxime axetil with-food check
Cefuroxime dose calculator details for 125 mg/5 mL suspension
Cefuroxime axetil dosing needs the selected suspension or tablet strength, the indication-specific mg/kg/day target, and a practical with food reminder.
Formula
mL per dose = prescribed cefuroxime mg per dose / (125 mg / 5 mL), which equals prescribed mg per dose / 25 mg per mL for that suspension.
Worked example
If the plan is 250 mg per dose and the bottle is 125 mg/5 mL, the measured volume is 10 mL per dose.
Safety checks before using the result
- Review allergy history before using cephalosporin antibiotics.
- Give cefuroxime axetil with food when the label or clinician directs it.
- Escalate severe diarrhea, allergic symptoms, or worsening infection signs.
Practical dosing guide
Before you measure the dose
Use this page to match the prescribed cefuroxime dose to a workable oral form and remember the with-food instructions that affect how well it works.
- Pediatric mg/kg dosing
- The calculator is most useful when you already have a cefuroxime mg/kg target and need to turn that into an exact child dosing plan.
- Oral versus IV route
- Many searches mention IV cefuroxime, but this page is safest for oral suspension or tablet planning.
- Suspension or tablet conversion
- The mg/kg math applies to the 125 mg/5 mL or 250 mg/5 mL suspension.
Cefuroxime pediatric medication summary
Cefuroxime is a second-generation cephalosporin antibiotic used in pediatrics for select respiratory, sinus, ear, and skin infections. Use the pediatric dose calculator to convert mg/kg dosing into mL of oral suspension (suspension and tablets are not bioequivalent, so do not convert mg-for-mg) and remember that oral cefuroxime axetil is best taken with food.
Suspension (3 months to 12 years): 30 mg/kg/day divided twice daily (max 1,000 mg/day) for ear infection and sinusitis; 20 mg/kg/day divided twice daily (max 500 mg/day) for strep throat, each for 10 days (label). Cefuroxime suspension and tablets are not bioequivalent, so do not swap them mg-for-mg; the tablet uses its own fixed doses.
Give the suspension with food (label); food also improves tablet absorption.
Cefuroxime indications and common pediatric uses
Cefuroxime axetil is a twice-daily oral cephalosporin for selected pediatric infections when first-line aminopenicillin pathways are unsuitable, not tolerated, or have failed.
Acute otitis media following amoxicillin or amox-clav failure
Acute otitis media following amoxicillin or amox-clav failure: Administer with food to improve absorption and reduce GI upset; consider tympanocentesis if symptoms persist.
Acute bacterial rhinosinusitis meeting bacterial criteria
Acute bacterial rhinosinusitis meeting bacterial criteria: Use when amox-clav is not tolerated or allergy-risk assessment favors cephalosporin use; pair with saline and intranasal steroid therapy.
Group A streptococcal pharyngitis/tonsillitis
Group A streptococcal pharyngitis/tonsillitis: Reserve for non-severe penicillin allergy history or intolerance; reinforce strict adherence to prevent relapse and nonsuppurative complications.
Community-acquired pneumonia step-down after IV third-generation cephalosporin
Community-acquired pneumonia step-down after IV third-generation cephalosporin: Use when organisms remain beta-lactam susceptible; pair with macrolide if atypical coverage is needed.
Skin and soft-tissue infections (MSSA/Streptococcus) when cephalexin not tolerated
Skin and soft-tissue infections (MSSA/Streptococcus) when cephalexin not tolerated: Use when cephalexin is not tolerated; avoid empiric MRSA coverage without susceptibility data.
Recurrent urinary tract infection prophylaxis when first-line agents fail
Recurrent urinary tract infection prophylaxis when first-line agents fail: Short-term prophylaxis only under specialist guidance; reassess after 3 months or sooner if infections recur.
How to give Cefuroxime
- Step-by-step guidance for safe cefuroxime administration in pediatrics.
- Shake the suspension vigorously before each dose, measure with an oral syringe at eye level, and administer with food or milk every 12 hours. Give the full measured amount directly (not in large bottles), then offer water afterward.
- Use morning/evening reminders, keep a visible dosing log, and store the bottle with its syringe together to reduce dosing errors. Align all caregivers on the same schedule and measurement approach.
Cefuroxime side effects, contraindications, and interactions
Most children tolerate cefuroxime well, but mild GI symptoms and rash can occur early in treatment. Families should know which symptoms can be watched at home and which require stopping the medicine and urgent evaluation.
Common side effects
- Pair each dose with food to improve absorption and lower nausea risk.
- Track stool pattern and fluid intake daily while on therapy and for several days after completion.
- Call the care team for persistent vomiting, worsening abdominal pain, fever with diarrhea, or reduced urine output.
Safety checks
- Known immediate hypersensitivity to cefuroxime or other cephalosporins
- History of cephalosporin-associated Stevens-Johnson syndrome, toxic epidermal necrolysis, or DRESS
- Severe IgE-mediated penicillin allergy
- Creatinine clearance <30 mL/min/1.73 m² or dialysis
- History of C. difficile infection or chronic GI disease
- Limited caregiver ability to monitor early red-flag symptoms
Drug interactions
- Review the full medication list with a clinician or pharmacist before combining therapies.
Cefuroxime mechanism and clinical pearls
Cefuroxime is a second-generation cephalosporin that kills susceptible bacteria by inhibiting cell wall synthesis. It binds penicillin-binding proteins (PBPs), interrupts peptidoglycan cross-linking, and leads to bacterial lysis. The oral prodrug cefuroxime axetil is converted to active cefuroxime after absorption, and food meaningfully improves exposure. Cefuroxime has better stability against many respiratory beta-lactamases than first-generation agents, which supports use for susceptible Haemophilus influenzae and Moraxella catarrhalis. Because killing is time dependent, missed doses and delayed intervals can undermine treatment success.
Cefuroxime axetil absorption is meaningfully better with food. Families should pair doses with breakfast and dinner and avoid giving on an empty stomach whenever possible.
Record what happened, when it happened, and whether emergency care was needed. A remote nonurticarial rash is different from immediate anaphylaxis and changes whether cefuroxime is appropriate.
At treatment start, tell caregivers exactly when to reassess (usually 48-72 hours). If fever, pain, or respiratory work is not clearly improving, verify diagnosis, adherence, and need for escalation.
Examples include prior amoxicillin failure with likely beta-lactamase organisms, or susceptibility data supporting cefuroxime. If that sentence is unclear, reconsider agent selection.
Frequently asked questions about Cefuroxime
Enter the child’s weight and the prescribed mg/kg target in the calculator, then convert that result into the liquid or tablet plan your clinician ordered. For oral cefuroxime axetil, remember to give the dose with food to improve absorption.
After you enter weight and the prescribed mg/kg target, match the result to the exact bottle strength on your child’s label. Suspension strengths can vary by product, so the bottle should drive the final mL per dose.
Food helps your child absorb more of the medicine and reduces stomach upset. Try pairing the dose with breakfast and dinner so it becomes part of your meal routine.
If vomiting happens within 15 minutes, call your clinician—an extra dose may be needed. If vomiting occurs later, continue the regular schedule and watch for dehydration.
Keep it refrigerated whenever possible. For short trips, place the bottle in an insulated bag with a cold pack and return it to the refrigerator as soon as you get home. Shake well before each dose.
Most children start to feel better within 48–72 hours. If fever, ear pain, or sinus pressure persists beyond that—or worsens—contact your clinician for reassessment.
Many children with mild penicillin allergies can take cephalosporins safely, but those with severe reactions (like anaphylaxis) may need an alternative. Share the exact allergy history with your clinician before starting.
Mild loose stools can occur. Encourage fluids and probiotics if recommended by your clinician. Call immediately for watery or bloody diarrhea, which could signal C. difficile infection.
Tell your clinician about acid reducers, antacids, anticoagulants, probiotics, or supplements your child takes. Some medicines need to be spaced a few hours apart to keep cefuroxime working well.
Yes, once fever-free for 24 hours and symptoms are improving. Inform the school nurse about the dosing schedule and possible drowsiness or stomach upset.
Sources reviewed for Cefuroxime
dailymed-cefuroxime-2025
aap-otitis-media-2023
idsa-sinusitis-2012
cdc-strep-throat-2025
idsa-cap-2011
idsa-ssti-2014