No, 5 doses of Augmentin are insufficient for treating adult infections
Standard treatment courses for Augmentin (amoxicillin-clavulanate) in adults require 5-14 days depending on the infection type, not 5 individual doses. Five doses would represent only 2.5 days of twice-daily therapy, which falls far short of evidence-based treatment durations.
Standard Treatment Durations by Infection Type
Respiratory Tract Infections
Acute bacterial sinusitis: 5-7 days minimum 1, 2
- Standard dosing: 875/125 mg twice daily
- High-dose formulation (2000/125 mg twice daily) may allow 5-day courses in uncomplicated cases 3
Community-acquired pneumonia: 7-10 days 4
- Shorter courses (5 days) only validated with specific high-dose formulations in selected patients
Acute exacerbations of chronic bronchitis: 5-7 days 3
- A 5-day course of high-dose amoxicillin-clavulanate (2000/125 mg twice daily) showed equivalence to 7 days of standard dosing
Skin and Soft Tissue Infections
Other Infections
- Streptococcal pharyngitis (carrier state): 10 days 6
- Dosing: 40 mg/kg/day amoxicillin component in 3 divided doses (maximum 2000 mg/day)
Critical Dosing Considerations
The FDA-approved dosing regimen specifies:
- Standard adult dose: 875/125 mg twice daily or 500 mg three times daily 7
- Treatment duration: "should be taken exactly as directed" and completing the full course is essential 7
- Skipping doses or incomplete courses decrease effectiveness and promote resistance 7
Evidence for Shortened Courses
While some research supports 5-day courses, this applies to complete 5-day treatment regimens (10 doses total), not 5 individual doses:
- A 5-day course of high-dose amoxicillin-clavulanate (2000/125 mg twice daily) demonstrated non-inferiority to 7-day standard dosing for acute exacerbations of chronic bronchitis 3
- For acute sinusitis, 5-day courses showed 80% success rates but were not equivalent to 10-day courses, particularly in patients with risk factors like recurrent sinusitis or previous sinus surgery 8
Common Pitfalls to Avoid
Confusing "5 days" with "5 doses": A 5-day course means 10 doses (twice daily) or 15 doses (three times daily)
Premature discontinuation: Stopping after symptom improvement (often 2-3 days) leads to treatment failure and resistance development 7
Inappropriate shortened courses: Only specific high-dose formulations have evidence supporting 5-day treatment, and only for select infections in patients without risk factors 8
Ignoring patient-specific factors: Patients with recurrent infections, immunosuppression, or complicated disease require standard-duration therapy 8
Recommendation
Complete the prescribed course of Augmentin, which should be 5-14 days (10-42 doses) depending on the infection being treated. Five doses represent inadequate therapy that risks treatment failure, symptom recurrence, and antimicrobial resistance development. If cost or tolerability is a concern, discuss alternative antibiotics with shorter validated courses (e.g., azithromycin 5 days for certain respiratory infections 1) rather than arbitrarily shortening Augmentin therapy.