[NRx=number of new prescriptions; TRx=number of total prescriptions (new+renewal). For recently launched drugs, the trend in NRx is an indictor of what can be expected for TRx with a modest time lag. NRx% and TRx% are calculated as NRx and TRx divided by the number of new and total prescriptions, respectively, for all drugs in the HBV category.
Note that a prescription is counted as new whenever it is newly written, even if is for a drug the patient is already taking.]