Hard stop when ordering Vancomycin as bolus

Would like the ability to put a hard stop for specific flowrates for a medication. Take Vancomycin, it should never be ordered as a bolus. However, we need the bolus option for normal saline. Our options are to keep bolus in flowrate with the risk of having a provider order Vancomycin, or remove bolus and educate the providers that bolus can be done but as free text. Ideally would like to keep bolus in the flowchart table maintenance but put a hard stop when ordering Vancomycin.