Quick Snapshot
| Feature | Augmentin 625 mg | Augmentin Duo (875 mg amox + 125 mg clavulanate) |
|---------|---------------------|--------------------------------------------------------|
| Amoxicillin + Clavulanate | 625 mg amoxicillin + 125 mg clavulanate | 875 mg amoxicillin + 125 mg clavulanate |
| Typical adult dose | 625 mg orally twice daily (12 h apart) | 875 mg + 125 mg orally twice daily |
| Typical pediatric dose (0‑<12 yrs) | 50 mg/kg/day amoxicillin (max 625 mg) | 75 mg/kg/day amoxicillin (max 875 mg) |
| Indicated infections | Mild‑to‑moderate: sinusitis, otitis media, mild UTI, skin/soft‑tissue | Mild‑to‑severe: same as above plus more aggressive infections (e.g., sinusitis with complications, otitis media with effusion, more severe UTI, dental abscesses) |
| Cost/Availability | Usually cheaper; widely available in most countries | Often more expensive; may be sold under brand names like “Augmentin Duo” in the US, “Augmentin Duo” or “Augmentin 875” elsewhere |
| Side‑effect profile | Same active ingredients → similar GI upset, rash, C. difficile risk | Same ingredients → similar side‑effects; higher amoxicillin dose → slightly higher risk of GI upset |
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What Does the “625” Mean?
- 625 mg refers to the total amoxicillin content in one tablet.
- Every 625 mg tablet also contains 125 mg clavulanic acid—the β‑lactamase inhibitor that protects amoxicillin from bacterial degradation.
- So the tablet’s composition is 625 mg amoxicillin + 125 mg clavulanate.
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What Is “Augmentin Duo”?
- “Duo” (or “Augmentin 875”) is simply a higher‑dose tablet: 875 mg amoxicillin + 125 mg clavulanate.
- The clavulanate dose stays the same; only the amoxicillin dose increases.
- It’s often marketed as a “high‑dose” option for more severe infections or when a higher therapeutic level is needed.
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Why Pick One Over the Other?
| Reason | 625 mg | Duo (875 mg) |
|--------|--------|--------------|
| Severity of infection | Mild‑to‑moderate | Moderate‑to‑severe |
| Pediatric weight | Lower weight‑based dose (max 625 mg) | Higher weight‑based dose (max 875 mg) |
| Cost | Cheaper | More expensive |
| Risk of GI upset | Slightly lower (due to lower amoxicillin) | Slightly higher |
| Treatment duration | 7–10 days (typical) | 7–10 days (typical) |
Bottom line: If your doctor says “Augmentin 625 mg,” they’re prescribing a moderate dose suitable for many common infections. If they prescribe “Augmentin Duo,” they’re opting for a higher dose—often for tougher or more extensive infections.
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Practical Tips
| Tip | Why |
|-----|-----|
| Take with food | Reduces nausea and stomach upset. |
| Stay hydrated | Helps prevent kidney stones (rare) and supports antibiotic excretion. |
| Finish the full course | Even if symptoms improve early, stopping early can lead to relapse or resistance. |
| Avoid alcohol | Alcohol can increase liver strain; both forms contain clavulanate, which can cause liver enzyme changes in rare cases. |
| Watch for side‑effects | Diarrhea, rash, or foul‑smelling stool → contact your provider. |
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When to Call Your Doctor
- Persistent fever after 48–72 h of therapy.
- Worsening symptoms (e.g., increasing pain, swelling).
- New rash or swelling that looks like an allergic reaction.
- Diarrhea that turns yellow, green, or bloody (possible C. difficile).
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Bottom‑Line Takeaway
- Both tablets contain the same active ingredients. The difference is the amount of amoxicillin—625 mg vs 875 mg—while the clavulanate dose is constant at 125 mg.
- Use the 625 mg version for most routine infections and when a lower dose is adequate or cost is a concern.
- Use the Duo (875 mg) when a higher amoxicillin level is needed for more severe or complicated infections, or when the infection is less responsive to lower doses.
Always follow your prescribing clinician’s guidance and keep an eye out for any side‑effects. If in doubt, ask your pharmacist or healthcare provider for clarification.