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Pre-Lab Instructions, Chapter 3Filling and Labeling the
Prescription
Prescription Filing SystemsPrescription Filing Systems
• Three-file system
– Schedule IIs separately
– Schedule III–Vs in a second file
– Noncontrolled drugs in third file
• Two-file system
– Schedule IIs in one file
– Scheduled III–Vs in second file
– Alternative two-file system: place all Schedules II–V in one file and all noncontrolled drugs in another
Prescription Filling ConcernsPrescription Filling Concerns
• Regulations for schedule drugs
– Schedule II—no refill
– Schedule III–V—max refill 5 times in 6 months
• Auxiliary labels
– Take with food
– May cause drowsiness
• OBRA 98—offer to counsel
• Expiration dates—12/07 expires 12/31/07
• Read label three times
DEA Number VerificationDEA Number Verification
• Add first, third, and fifth digits
• Add second, fourth, and sixth digits & multiply by 2
• Add the above two results together
• The last digit of the resulting sum should be the same as the last number in the DEA number
• The second letter of the DEA should be the first letter of the prescriber’s last name
• If the number does not pass these checks, notify pharmacist
Dosage CalculationDosage Calculation
• Check for reasonable dose
– Manufacturer recommendations
• Pediatric dosing
– Clark’s rule
– Fried’s rule
– Young’s rule
– BSA
• Maximum recommended dose
• Minimum dose
• Dosage range
Locating Package Insert InformationLocating Package Insert Information
• Black box warning
• NDC number
• Dosage forms
• Manufacturer recommended doses
• Contraindications
• Route of elimination
• Pregnancy category