Electrolytes are extremely important for proper re-hydration therapy to take place in the body. Water alone will not hydrate your reptile if it's electrolytes are depleted or out of balance. Any time you begin any type of nutritional therapy on a sick or malnourished reptile, hydration therapy with electrolytes is essential.
With calcium being the most abundant mineral in our bodies, we also need to pay attention to some of the other things found in our bodies, the most abundant molecules in all living organisms... H20.
If you are going to medicate your own dragon, you should really learn how to calculate dosages. More importantly, you must learn how to read a syringe.