HARD STOP SETUP FOR DRUGS ON ORDER ENTRY

It would be nice to be able to setup parameters on drugs in the item master that would prevent order entry if that parameter was out of range. For example: I would like to set up an age restriction on high dose flu vaccine which would hard stop order entry if a drug order was entered for a patient less than 65 years old. But I would like to have the option to choose different parameters other than age and set them up on a specific drug. CrCl is the other parameter I would use most often. I would want the value to be pulled from the demographics section that is auto-calculated based on the patient's lab values instead of directly from an ancillary order because our lab does not report CrCl just serum creatinine.