Augmentin dosage: practical, easy-to-follow guidance
If you need to take Augmentin (amoxicillin with clavulanate), the most useful thing is a clear plan: which strength, how often, and simple safety tips. Below I explain common adult doses, how pediatric dosing works by weight, and quick do's and don'ts so you can use it safely while following your prescriber's instructions.
Typical adult dosing
For adults, doctors commonly prescribe one of two schedules: 500 mg/125 mg every 8 hours or 875 mg/125 mg every 12 hours. Those numbers show the amoxicillin and clavulanate amounts. The exact strength depends on the infection type and how severe it is. Your doctor may choose a different dose if you have kidney problems or a very serious infection.
Take Augmentin with food to reduce stomach upset. If you miss a dose, take it as soon as you remember unless it's almost time for the next dose—don't double up. Keep to the full course even if you feel better, or the infection can come back and lead to resistance.
Pediatric dosing and weight-based rules
Children get Augmentin based on weight, not age. A common rule is 20–40 mg of the amoxicillin component per kg of body weight per day, split into doses every 8–12 hours. For tougher infections like some ear or sinus infections, doctors may use higher regimens — sometimes up to about 80–90 mg/kg/day of the amoxicillin component, split twice daily. Your pediatrician will calculate the exact dose and choose the right liquid concentration if needed.
Always use the dosing syringe that comes with the bottle for liquid forms. If the doctor prescribes a suspension, shake well and follow storage instructions on the label. Many suspensions need refrigeration and should be used within the time printed on the bottle.
Side effects to watch for: loose stools, nausea, and occasional rash. If you develop severe diarrhea (many watery stools, belly cramps, fever), bloody stools, or signs of an allergic reaction (hives, swelling, trouble breathing), stop the antibiotic and get medical help right away. Don’t take Augmentin if you have a known severe penicillin allergy.
Final practical tips: always follow the exact dose and schedule your prescriber wrote, bring up kidney issues or pregnancy when you talk to your doctor, and ask the pharmacist any questions about interactions or storage. If something feels off while you’re on Augmentin, call your healthcare provider—better to check than guess.