Amoxicillin-Clavulanate 1 Gram Dose Clarification
When prescribing "1 gram" of amoxicillin-clavulanate, this refers to the 875 mg/125 mg tablet formulation taken twice daily (every 12 hours), which provides approximately 1 gram total of the combination per dose. 1
Understanding the Formulation
The 875 mg/125 mg tablet contains:
- 875 mg amoxicillin (as trihydrate)
- 125 mg clavulanic acid (as potassium salt)
- Total = 1000 mg (1 gram) per tablet
This is the standard "high-dose" formulation used for moderate to severe infections 2, 1.
Dosing Schedule
The 875 mg/125 mg tablet is administered every 12 hours (twice daily), not three times daily 1. This provides:
- Total daily amoxicillin: 1750 mg
- Total daily clavulanate: 250 mg
Clinical Context from Guidelines
For skin and soft tissue infections, the IDSA guidelines specifically list amoxicillin-clavulanate 875/125 mg twice daily (bid) as the appropriate dosing regimen 2. This formulation has been validated in multiple clinical trials showing comparable efficacy to the 500/125 mg three-times-daily regimen, with the added benefit of improved compliance and potentially less severe diarrhea 1, 3.
Critical Prescribing Points
Do NOT substitute two 250 mg/125 mg tablets for one 500 mg/125 mg tablet - they are not equivalent because both contain the same 125 mg of clavulanic acid, which would result in clavulanate overdosing 1.
The every-12-hour dosing achieves adequate time above the minimum inhibitory concentration (MIC) for amoxicillin, maintaining therapeutic levels throughout the dosing interval 1.