Please check your internet connection and try again.
# Mega-CV
## Overview
Mega-CV is a combination antibiotic product containing amoxicillin and clavulanate potassium. Amoxicillin is a beta-lactam antibiotic that inhibits bacterial cell wall synthesis. Clavulanate potassium is a beta-lactamase inhibitor that protects amoxicillin from degradation by certain bacterial beta-lactamases, thereby extending its spectrum of activity.
## Primary Indications
* Bacterial infections susceptible to amoxicillin, including:
* Acute otitis media
* Acute bacterial sinusitis
* Community-acquired pneumonia
* Acute exacerbations of chronic bronchitis
* Skin and skin-structure infections
* Urinary tract infections (when caused by susceptible organisms)
## Adult Dosing
Dosing is based on the amoxicillin component. Common dosages include:
* 250 mg amoxicillin/125 mg clavulanate orally every 8 hours or 500 mg amoxicillin/125 mg clavulanate orally every 8 hours.
* 875 mg amoxicillin/125 mg clavulanate orally every 12 hours.
The maximum recommended daily dose of amoxicillin is 4000 mg. The maximum recommended daily dose of clavulanate potassium is 1000 mg.
## Pediatric Dosing
Dosing is typically based on amoxicillin weight-based recommendations, usually ranging from 25 mg/kg/day to 45 mg/kg/day divided into two or three doses, depending on the severity and type of infection. The clavulanate component is dosed accordingly (e.g., 3.6 mg/kg/day to 10 mg/kg/day divided into two or three doses).
For acute otitis media, sinusitis, and lower respiratory tract infections, a common dose is 45 mg/kg/day of amoxicillin, given as Mega-CV 400 mg/57 mg per 5 mL suspension, every 12 hours.
The maximum dose for children should not exceed the maximum adult dose.
## Dose Adjustments
* **Renal Impairment:** Dose adjustment is necessary for adults and children with significant renal impairment (CrCl < 30 mL/min). Refer to specific prescribing information for detailed recommendations. For CrCl between 10-30 mL/min, reduce the frequency of dosing. For CrCl < 10 mL/min, reduce dose and frequency.
## Contraindications
* Hypersensitivity to amoxicillin, clavulanate potassium, penicillins, or any component of the formulation.
* History of jaundice or hepatic dysfunction associated with amoxicillin-clavulanate use.
## Adverse Effects
* **Common:** Diarrhea, nausea, vomiting, rash, urticaria, pruritus.
* **Serious:** Severe allergic reactions (anaphylaxis), Clostridioides difficile-associated diarrhea (CDAD), hepatotoxicity, Stevens-Johnson syndrome, toxic epidermal necrolysis.
## Key Drug Interactions
* **Probenecid:** May increase and prolong amoxicillin blood levels.
* **Oral Contraceptives:** May decrease efficacy.
* **Warfarin:** May increase INR. Monitor INR closely.
* **Allopurinol:** May increase the incidence of rash.
## Monitoring
* Monitor for signs and symptoms of hypersensitivity reactions.
* Assess for diarrhea and signs of CDAD.
* Monitor liver function tests if hepatotoxicity is suspected.
* Monitor prothrombin time/INR in patients taking warfarin.
## Clinical Pearls
* Mega-CV should be taken with or without food, but taking it with food may reduce gastrointestinal intolerance.
* Ensure adequate hydration during treatment.
* Complete the full course of therapy as prescribed, even if symptoms improve.
* Consider the potential for cross-reactivity with other beta-lactam antibiotics.
***
*Disclaimer: This information is intended for clinical pharmacists and healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines for definitive patient care decisions. Dosing and recommendations may vary based on patient-specific factors and local institutional protocols.*
