1. Standard prescription format
Rp: drug name (dosage form) unit dose × total amount
Sig. unit dose usage times per day
Example 1: Rp: Inj .Penicillin sodium 800,000 U × 6 tubes
Sig. 800,000 U i.m. bid (skin test)
Example 2: Rp: Cefaclor sustained-release capsules 0.1875g × 12 capsules
Sig. 0.375g bid
2. Simple prescription format
Rp: Drug name (dosage form) Unit dose Usage Number of times per day × number of days
Example 1: Rp: Inj. Penicillin sodium 800,000 U
3 x bid i.m.
Example 2: Rp: Cefaclor sustained-release capsules x 1 box
2 capsules x bid