Moxatag (amoxicillin)

The following drug information is obtained from various newswires, published medical journal articles, and medical conference presentations.

Approval Status:

Approved January 2008

Specific Treatments:

tonsillitis and/or pharyngitis secondary to Streptococcus pyogenes in adults and pediatrics

General Information

Moxatag contains amoxicillin, a semi-synthetic antimicrobial belonging to the penicillin class of antimicrobials with activity against gram-positive and gram-negative bacteria. Moxatag is an extended release tablet formulation consisting of three components, one immediate-release and two delayed-release, each containing amoxicillin. The three components are combined in a specific ratio to prolong the release of amoxicillin from Moxatag compared to immediate-release amoxicillin.

Moxatag is specifically indicated for the treatment of tonsillitis and/or pharyngitis secondary to Streptococcus pyogenes (S. pyogenes) in adults and pediatric patients 12 yrs and older.

Moxatag is supplied as a 775 mg tablet designed for oral administration. The recommended initial dose of the drug is 775 mg once daily taken within 1 hour of finishing a meal for 10 days. The full 10-day course of therapy should be completed for effective treatment of tonsillitis and/or pharyngitis secondary to S. pyogenes. Moxatag is contraindicated in patients with known serious hypersensitivity to amoxicillin or to other drugs in the same class or patients who have demonstrated anaphylactic reactions to beta-lactams.

Clinical Results

FDA Approval
FDA approval of Moxatag was based on the results of a clinical trial. This randomized, parallel-group, multi-center, double-blind, double-dummy study enrolled adult and pediatric subjects, aged 12 years and older, with tonsillitis and/or pharyngitis secondary to S. pyogenes. The subjects received Moxatag 775 mg QD or penicillin VK 250 mg QID, both for 10 days. Moxatag was determined to be non-inferior to penicillin. The results were as follows:

Modified intent-to-treat population
This included all randomized subjects with a positive throat culture for S. pyogenes at baseline. Bacterial eradication was observed in 79.7% of the Moxatag arm and 78% in the penicillin arm.
Per-protocol population
This included mITT subjects who had post-therapy cultures, were compliant with treatment, and didn’t have major protocol violations. Bacterial eradication was observed in 85% of the Moxatag arm and 83.4% of the penicillin arm.

Ongoing Study Commitments

  • MiddleBrooke Pharma has agreed to conduct a pediatric study of an amoxicillin extended-release formulation for the treatment of tonsillitis and/or pharyngitis secondary to Streptococcus pyogenes in pediatric patients two to less than 12 years of age.
    Final Report Submission: March 31, 2013

Side Effects

Adverse events associated with the use of Moxatag may include, but are not limited to, the following:

  • Vulvovaginal mycotic infection
  • Diarrhea
  • Nausea
  • Vomiting
  • Headache
  • Abdominal pain

Mechanism of Action

Moxatag contains amoxicillin, a semi-synthetic antimicrobial belonging to the penicillin class of antimicrobials with activity against gram-positive and gram-negative bacteria. Moxatag is an extended release tablet formulation consisting of three components, one immediate-release and two delayed-release, each containing amoxicillin. The three components are combined in a specific ratio to prolong the release of amoxicillin from Moxatag compared to immediate-release amoxicillin. Amoxicillin exerts its bactericidal action against susceptible organisms during the stage of multiplication. It acts through the inhibition of biosynthesis of cell wall mucopeptide. To date there are no known mechanisms of resistance to penicillin or amoxicillin in Streptococcus pyogenes.

Literature References

Clegg HW, Ryan AG, Dallas SD, Kaplan EL, Johnson DR, Norton HJ, Roddey OF, Martin ES, Swetenburg RL, Koonce EW, Felkner MM, Giftos PM Treatment of streptococcal pharyngitis with once-daily compared with twice-daily amoxicillin: a noninferiority trial. The Pediatric Infectious Disease Journal 2006 Sep;25(9):761-7

Aguilar A, Tinoco JC, Macias M, Huicho L, Levy J, Trujillo H, Lopez P, Pereira M, Maqbool S, Bhutta ZA, Sacy RA, Deacon S Clinical and bacteriologic efficacy of amoxycillin b.d. (45 mg/kg/day) versus amoxycillin t.d.s (40 mg/kg/day) in children with group A beta-hemolytic streptococcal tonsillopharyngitis. Journal of Chemotherapy 2000 Oct;12(5):396-405

Cohen R, Levy C, Doit C, De La Rocque F, Boucherat M, Fitoussi F, Langue J, Bingen E Six-day amoxicillin vs. ten-day penicillin V therapy for group A streptococcal tonsillopharyngitis. The Pediatric Infectious Disease Journal 1996 Aug;15(8):678-82

Additional Information

For additional information regarding Moxatag or tonsillitis and/or pharyngitis secondary to Streptococcus pyogenes, please visit the Moxatag web page.