Medication Quantity Formula:
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The Medication Quantity Calculator determines how many tablets or capsules are needed to achieve a prescribed dose based on the available medication strength. This is essential for accurate medication administration.
The calculator uses the simple formula:
Where:
Explanation: The calculation divides the total dose needed by the amount of medication in each unit to determine how many units are required.
Details: Proper medication quantity calculation ensures patients receive the correct therapeutic dose while avoiding under- or over-dosing, which can lead to treatment failure or toxicity.
Tips: Enter the prescribed dose in mg and the medication strength in mg per tablet/capsule. Both values must be positive numbers (strength must be > 0).
Q1: What if the calculation results in a fraction?
A: Some medications can be split (check with pharmacist). For others, round to nearest whole number or consult prescriber for dose adjustment.
Q2: Can this be used for liquid medications?
A: Yes, if you adjust units (e.g., mg/mL instead of mg/tablet) and calculate volume instead of quantity.
Q3: What about combination medications?
A: For fixed-dose combinations, calculate based on the active ingredient you're targeting or consult a pharmacist.
Q4: How precise should the calculation be?
A: Follow medication-specific guidelines. Some drugs require very precise dosing (e.g., warfarin), others have wider therapeutic windows.
Q5: Should this replace professional judgment?
A: No, always verify calculations and consider patient-specific factors like renal/hepatic function that may affect dosing.