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