For weight-based doses of Bicillin that are smaller than the prefilled syringe, are you drawing those up patient-specific or dispensing the full syringe with its original labelling?
The commercial product has a very strong statement that says, “WARNING: FATAL IF GIVEN BY OTHER ROUTES,” which you can see in the photo below. If transferring the patient’s dose to a standard IV syringe for IM administration, we would lose this labeling and increase the risk of inadvertent IV administration.