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Basic Drug Calculations

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# Basic Drug Calculations - PowerPoint PPT Presentation

Basic Drug Calculations. General Rules. NEVER give a drug without consulting a clinician on your calculations You will need: Weight of patient Dose of drug Concentration of drug. Patient Weight. in Kilograms (kg) Should be taken every morning Use the same scale! Weigh, then calculate.

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## Basic Drug Calculations

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### Basic Drug Calculations

General Rules

NEVER give a drug without consulting a clinician on your calculations

You will need:

Weight of patient

Dose of drug

Concentration of drug

Patient Weight
• in Kilograms (kg)
• Should be taken every morning
• Use the same scale!
• Weigh, then calculate
Drug Dosage
• usually in mg/kg
• will be different for different routes and frequencies of administration
• can be found in:
• exotic formulary
• from clinician
• meloxicam
• fluids
Drug Concentration
• usually in mg/ml
• can be found on the bottle
• ALWAYS check the concentration of the drug you are actually using
The Actual Math...

Ex: Pip Orbifloxacin

• weight: 1.12 kg
• dose: 15 mg/kg
• concentration: 30 mg/ml
• amount: 0.56 ml

1. weight (kg) x dose (mg/kg) = mg

2. mg x concentration (mg/ml) = amount to administer (ml) *you are actually dividing

**Fluid doses are in ml/kg so you only need step 1!

On Your Treatment Sheet...
• Name of drug
• Dose
• Concentration
• Actual Amount
• Route of Administration
• SQ, IM, IV, PO, eye drop, etc
• Frequency
• SID, BID, QID, TID
• or q12h, e.g.
• Orbifloxacin
• 15 mg/kg
• 30 mg/ml
• PO
• BID