Pediatric dosing math. Solved.

Weight-based liquid antibiotic calculations in seconds. No more looking up concentrations, converting units, or second-guessing the math at the end of a long day.

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Benjamin Saikin, DMD General dentist & creator of SyrupRx

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SyrupRx

v1.0.0 • Build f335a59

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Patient Weight

20.0 kg

lb kg

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Patient has penicillin allergy

Antibiotic

Concentration

Dose Regimen

First-line for dental infections if no penicillin allergy

Course Length

7 days 10 days

Indication

▶ Advanced Details

Calculated Rx

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Patient: ____________     Date: _______
Weight: 44.0 lb (20.0 kg)

Amoxicillin 400 mg/5 mL oral susp.
Sig: Give 2.5 mL by mouth every 8 hours
     for 7 days
     (200 mg per dose; 30 mg/kg/day)
     Calculated at 30 mg/kg/day (guideline range: 25–90 mg/kg/day)

Disp: 75 mL (includes ~10% overfill)
Refills: 0

Notes: Shake well before each dose.
       Store per manufacturer.
       Re-evaluate in ~3 days; stop 24h
       after symptom resolution (ADA 2019).

Dosing per AAPD Useful Medications; FDA Amoxicillin Label

For otherwise healthy patients. Does not account for renal/hepatic impairment, drug interactions, or age-specific adjustments.

Rounding Policy:
• Doses <2 mL → Nearest 0.1 mL
• Doses ≥2 mL → Nearest 0.5 mL

Antibiotic Stewardship: Per ADA 2019 guidelines, re-evaluate in ~3 days and discontinue 24 hours after symptom resolution.

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You pick the antibiotic and dosage. We handle the math.

Transparent, guideline-sourced calculations you can trust.

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Weight-based calculations

Enter pounds or kilos. Get the exact mL per dose with proper rounding for oral syringes.

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Dose caps enforced

Automatic ceiling on daily and single doses per current guidelines. No manual lookup required.

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Allergy-aware

Mark PCN allergy once. Tool automatically disables penicillins and shows safe alternatives.

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Copy or print

One click to clipboard. One click to print. Formatted and ready to paste into your Rx.

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Citations included

Every calculation traced to AAPD, FDA labels, or published guidelines. Audit-ready documentation.

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History tracking

Every calculation logged with timestamp. Your calculation history, built in.

Three steps. Zero guesswork.

From weight to calculated dosing in under 30 seconds.

Enter the weight

Pounds or kilos — the tool converts automatically.

Pick the antibiotic

Choose from 5 common dental antibiotics and concentrations.

Copy the calculated Rx

Formatted, dose-capped, and ready for the chart.

Simple, honest pricing

One plan for individuals. Custom pricing for groups.

Individual

$29/month

or $290/year (save 2 months)

Unlimited calculations
All 5 antibiotics included
Full calculation history
Works on any device
All future updates

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Multi-Location Practice

Custom pricing

For DSOs and group practices

Volume licensing
Centralized billing
Dedicated support
Custom integrations available
Usage analytics

Why I built this

I'm a general dentist. When I need to write a liquid antibiotic script — which isn't every day — I found myself looking up the same things every time: concentrations, weight conversions, max doses.

It's the kind of task that's just infrequent enough that the details never stuck, but important enough that I didn't want to get it wrong.

So I built a tool that remembers for me. Now when it comes up, I get the right answer in seconds instead of digging through references.

— Benjamin Saikin, DMD