Yes on the consistent schedule. The only person that can change the schedule would be a Doctor's order. Check with your nurse practice act and/or state board. Ours states that we have one hour before and up to one hour after. IE) Order states to give at 2100, we can give it beginning at 2000, or up to 2200, after that it is considered a med error for missing one of the 5 rights. Patient, med, time, dose, route... etc. Also, the unique challenge of PDN, is you can check the BP all you want and if you miss the time, then the parent can decide they want to give the med. At that point all you can do is document in the nurse's notes "mom gave propanolol at this time" and inform the next nurse in report (if there is one). Hope this helps.