Prescription notation is a system used by medical professionals to communicate information about medications to pharmacists. The two main components of prescription notation are the TER, which stands for 'therapeutic equivalence rating, ' and the DOSAGE, which is the amount of medication prescribed. The TER is a three-letter code that indicates the strength of the medication, while the DOSAGE is a six-letter code that indicates the amount of medication to be taken. Together, these two components provide a complete description of the medication prescribed.