Medication Dosage
Reference Calculator
Educational Reference. Always Verify With Your Pharmacist.
IMPORTANT EDUCATIONAL DISCLAIMER
This calculator is for educational reference only. Never use this information to determine actual medication dosing. Always consult your prescribing physician or pharmacist before taking or administering any medication.
Reference Lookup Tool
OTC medications only — no prescription or controlled substances
⚠️ No infants or neonates — consult a pediatrician for children under 2
How to Use This Tool
Three steps to look up general OTC dosage reference information
Select Your Medication
Choose from 6 OTC categories and select the specific medication you want to look up.
Enter Patient Details
Select the age group and optionally enter weight for weight-based dose calculations.
Review Reference Info
See general reference dosing ranges, max daily dose, brand names, and key warnings.
6
OTC Categories
20+
Medications
4
Age Groups
Free
No Signup Required
Frequently Asked Questions
Is this safe to use for actual medication dosing?
No. This tool is for educational reference only. You must consult your pharmacist or physician to determine the correct dose for your specific medical history, current medications, and conditions.
What medications are included?
Only common OTC medications available in the US: pain relievers (acetaminophen, ibuprofen, naproxen), antihistamines (Benadryl, Claritin, Zyrtec), antacids (Tums, Pepcid, Prilosec OTC), laxatives (MiraLAX, Colace), and vitamins (D3, C, Magnesium).
Why doesn't the tool cover infants under 2 years?
Infant dosing requires precise medical supervision and is outside the scope of an educational reference tool. For children under 2, always consult your pediatrician.
How much acetaminophen can an adult safely take?
The general reference maximum is 4,000 mg/day for healthy adults; however, 3,000 mg/day is recommended if you use alcohol regularly or have any liver conditions. Always check combination cold/flu products, which often contain hidden acetaminophen.
Can I take ibuprofen and acetaminophen together?
Alternating acetaminophen and ibuprofen is commonly practiced, but you should consult your pharmacist or physician before doing so, especially if you take other medications or have underlying health conditions.
Medication Guides
View all guides →How to Read Medication Labels: A Complete Guide to Drug Facts Panels
Learn how to decode OTC medication labels, understand Drug Facts panels, identify active ingredients, dosage instructions, and critical warnings.
Read more →
Acetaminophen vs. Ibuprofen: Key Differences, Uses, and Safety
Compare acetaminophen (Tylenol) and ibuprofen (Advil/Motrin) — mechanism, uses, dosing, side effects, and which situations call for each.
Read more →
Medication Dosage by Weight: Why It Matters and How It Works
Learn why weight-based medication dosing matters for children and adults, how mg/kg calculations work, and why body weight affects how drugs work in the body.
Read more →
⚠️ Medical Disclaimer: This calculator is for educational reference only. Never use this information to determine actual medication dosing. Always consult your prescribing physician or pharmacist before taking or administering any medication. This website is not affiliated with any medical institution, pharmacy, or healthcare provider.