Amoxicillin doses vary by infection; common adult single doses range from 250–875 mg, or weight-based 25–50 mg/kg in children.
When people ask about the amount in a single dose, they want a clear range they can compare with what’s on the label. This guide explains common single-dose amounts doctors use, how those amounts change by infection and age, and what to check on your bottle or box. It’s an educational overview, not a prescription. Follow the instructions from your prescriber and the directions on your specific product.
How Much Is A Single Amoxicillin Dose For Common Infections?
Most adults receive a capsule or tablet strength that lands at 250 mg, 500 mg, or 875 mg per dose. Many children receive a liquid dose measured in milliliters (mL) based on body weight. The number of times per day and the length of the course depend on the infection and local guidance. A practical snapshot sits below.
Typical Single Doses By Condition (Adults)
| Condition | Common Single Dose | Frequency / Duration |
|---|---|---|
| Strep throat / scarlet fever | 500 mg–1,000 mg | Two times daily or once daily for 10 days (max 1,000 mg per single dose if once daily) |
| Ear, nose, or throat infection | 250–500 mg | Three times daily; course set by clinician |
| Sinus infection | 500–875 mg | Two or three times daily; length varies by severity |
| Skin / soft-tissue infection | 250–500 mg | Three times daily; length varies |
| Dental procedure prophylaxis* | 2,000 mg | Single dose 30–60 minutes before the procedure (for select cardiac indications) |
*Used only for select patients at high risk of endocarditis; your dentist or cardiology team decides if this applies to you.
Two anchor sources shape the ranges above. The NHS dosing page notes 250–500 mg three times daily as a usual capsule amount for adults, and the U.S. CDC guidance for group A strep lists 500 mg twice daily or 1,000 mg once daily for 10 days, with weight-based options for kids. These references match what many clinicians write in day-to-day care.
Capsules, Tablets, Liquids, And What Those Numbers Mean
Pharmacies stock several strengths. Capsules and tablets often read 250 mg, 500 mg, or 875 mg. Chewables exist for people who don’t swallow pills. Liquids are labeled by “mg per 5 mL” such as 125 mg/5 mL or 250 mg/5 mL. That label helps you convert the milligrams your prescription calls for into a volume you draw up with a supplied oral syringe.
How Single-Dose Amounts Are Chosen
Clinicians match the target bacteria and site of infection with a dose that reaches steady levels in tissues. They also consider age, kidney function, allergy history, and prior antibiotic use. Some conditions call for higher per-dose amounts or “high-dose” total daily targets to cover resistant bugs in the community. An ear infection in a child is a classic case, where pediatric teams may target higher mg/kg totals for the day split into two doses.
Adult Dosing Patterns And Ranges
Across many straightforward infections, adults often take one of three per-dose amounts:
- 250 mg per dose — used for milder cases and when the plan is three times daily.
- 500 mg per dose — common for ear, nose, and throat infections; often given three times daily or twice daily depending on the plan.
- 875 mg per dose — used in twice-daily plans when the clinician wants a higher single amount per dose.
The number of daily doses matters as much as the amount. Many plans use two or three daily doses spaced evenly to keep drug levels steady. That spacing helps the medicine keep pressure on the target bacteria through the day and night.
When A 1,000 mg Single Dose Appears
Once-daily 1,000 mg plans show up in strep throat care for older kids and adults, aligning with CDC language. The same 10-day course applies. A twice-daily alternative caps each single dose at 500 mg with the same 10-day total.
Pediatric Dosing: Weight-Based Single Doses
Children usually receive a weight-based amount expressed as milligrams per kilogram (mg/kg). The total daily target is then split into two or three single doses. For strep throat, a common approach is 50 mg/kg once daily (max 1,000 mg per single dose) for 10 days, or 25 mg/kg twice daily (max 500 mg per single dose) for 10 days. For ear infections, many clinics select higher daily totals split into two single doses to improve middle-ear drug levels during the first few days of treatment.
How To Read A Liquid Label And Draw One Dose
Say the label reads 250 mg/5 mL and your child’s single dose is 500 mg. You’d draw 10 mL per dose. If the label reads 125 mg/5 mL for a 250 mg single dose, you’d draw 10 mL. Pharmacists include an oral syringe or spoon with graduation marks to make this simple and accurate.
Course Length And Why Your Single Dose May Change
Many plans last 5–10 days. Strep throat plans still use 10 days widely. Sinus and skin plans vary based on symptom course and response. A clinician may adjust the per-dose amount or the number of daily doses if symptoms lag, if kidney function is reduced, or if a different organism is suspected.
Capsules Versus Liquid: Matching Form To The Patient
Pills are easy for most adults. Liquid helps with younger kids and anyone with swallowing trouble. The liquid also allows fine-tuning of mg/kg single doses. Shake the bottle well before each dose and store it as directed by the pharmacy label.
Red Flags And When To Call Your Prescriber
Get urgent care for facial or tongue swelling, trouble breathing, or a widespread rash. These signs point to a severe reaction that needs immediate attention. Call your clinic if diarrhea is severe or bloody, if a rash appears without breathing issues, or if symptoms don’t start to ease within 3–5 days. Dosing questions are best answered with your actual product in hand, since strengths differ by brand and region.
Condition-Specific Notes That Shape A Single Dose
Strep Throat
For confirmed group A strep, the CDC lists two plans that set the single dose clearly: 50 mg/kg once daily (cap 1,000 mg per dose) for 10 days, or 25 mg/kg twice daily (cap 500 mg per single dose) for 10 days. Adults commonly receive 500 mg twice daily for 10 days, or a single 1,000 mg daily dose. These plans help clear the organism and lower the risk of complications. See the CDC clinical page linked earlier in this article for the full table.
Ear Infection In Children
Many pediatricians favor higher daily totals split into two doses across the day during the first few days. The reasoning is simple: higher middle-ear levels early on. If your child was given a number that looks larger than a typical strep plan, that is often why. Your pediatric team will set the exact numbers based on weight and recent antibiotic use in the past month.
Sinus And Skin Infections
Single-dose amounts range across 500–875 mg for adults, either twice daily or three times daily. The plan depends on symptom duration, exam findings, and local resistance patterns. A mid-course check can prompt a switch in dose, frequency, or medicine.
How To Space Single Doses Through The Day
If a plan says “three times daily,” two easy schedules are breakfast–mid-afternoon–bedtime or morning–midday–evening. For “twice daily,” pick morning and evening times you can stick with every day. This medicine plays best with steady timing. Missed doses can reduce the time drug levels sit above target values in blood and tissues.
Food, Fluids, And Tolerance
You can take this medicine with or without food. Many people find that a snack curbs stomach upset. Drink water with each dose. If nausea or diarrhea shows up, keep notes on timing and talk with your prescriber if it gets worse.
What The Label On Your Bottle Tells You
- Strength: mg per capsule or mg per 5 mL for liquids.
- Single dose: the mg to take each time. For liquids, the label often lists mL per dose.
- Frequency: how many times per day.
- Course length: number of days.
- Storage: some liquids stay in the fridge; others stay at room temperature based on the brand. Follow your label.
Safety Notes That Affect The Amount You Take
Kidney function: Reduced kidney function can change the single dose or the time between doses. That adjustment keeps drug levels steady without building up. Your clinician and pharmacist handle the math using your lab values.
Allergy history: Known reactions to penicillin-class antibiotics matter. Tell your care team exactly what happened and when. That history guides whether this medicine is right for you or if another option fits better.
Other medicines: Interactions exist. Bring a current list to the pharmacy pickup window. That quick check prevents conflicts with common drugs and supplements.
Quick Pediatric Reference For Single Doses
This high-level table shows how a weight-based plan turns into a single dose for common strengths of liquid. Your child’s plan may differ. Always match to the strength on your label.
| Weight Band | Per-Dose Target | How That Looks With 250 mg/5 mL Liquid |
|---|---|---|
| 10–15 kg | 250–375 mg per dose | 5–7.5 mL per dose |
| 16–25 kg | 400–625 mg per dose | 8–12.5 mL per dose |
| 26–35 kg | 650–875 mg per dose | 13–17.5 mL per dose |
| 36–45 kg | 900–1,000 mg per dose* | 18–20 mL per dose |
*Do not exceed the single-dose cap listed in your prescription. Many strep plans cap a single dose at 1,000 mg.
How Clinicians Set A Child’s Single Dose
Two steps drive the number. First, the team picks a daily mg/kg target that fits the condition. Second, they split that daily total into two or three doses. Strep throat plans often use a once-daily single dose. Ear infection plans often use two single doses in a day with a higher daily target. Both styles are common and effective when matched to the right situation.
Practical Tips For Getting Each Dose Right
- Use the right measuring tool: A supplied oral syringe or marked spoon beats a kitchen teaspoon every time for accuracy.
- Shake liquid well: The active drug settles between doses. A quick, firm shake keeps the dose even.
- Keep timing steady: Set phone alarms. Consistent spacing helps maintain effective levels in the body.
- Finish the course: Stopping early invites the infection to rebound.
- Check the cap each time: Tighten after dosing; some liquids need refrigeration to stay stable.
When Numbers Differ From What You Expected
Single-dose amounts vary across clinics and countries. Labels differ too. A capsule strength available in one region may not be stocked in another. If the number on your label looks different from ranges in this guide, match against the links above and call your pharmacy for clarity. The pharmacist sees your exact product and can explain the conversion from mg to mL for your bottle strength.
What This Guide Covers And What It Doesn’t
This page collects dose ranges from public health and national medicine pages so you can read your own label with confidence. It covers common infections and widely used strengths. It does not replace a visit or a tailored plan from your clinician. People with kidney disease, complex infections, or recent antibiotic courses often need adjustments that only a prescriber can make with lab and exam findings.
Bottom Line On Single-Dose Amounts
Most adults take 250–875 mg per dose, two or three times per day. Kids take weight-based amounts that convert cleanly to mL using the strength on the bottle. Strep throat care often uses 500 mg twice daily for adults or a single 1,000 mg daily dose. Ear infections in kids may use higher daily totals split into two doses. Use the tables above to read your label, then stick to the timing and finish the course.
Sources And Method
Numbers on adult three-times-daily ranges and common liquid strengths come from the NHS medicine page. Single-dose caps and once-daily strep plans come from the CDC clinical guidance. Pediatric ear infection practice often targets higher daily totals split in two; this approach is described across pediatric reviews and is reflected in day-to-day primary care.