If the nasal spray Sqad[i is recommending is similar to our (in the U.S.) saline solution (one name brand is Oceans) then theres no medication nor any decongestant. Although primarily used for relieving congested sinuses by irrigating the mucous membranes throughout the sinus cavities, I've found it to be helpful in relieving ear ache as well, since the Eustachian tubes soon become clogged (they're inside diameter is about the size of a small piece of spaghetti).
Additionally, the Eustachian tubes were designed to drain into the back of the throat... so... tell your daughter to try holding her nose closed with one hand and [i]swallowing[i] to alleviate the clogged feeling... [i]don't] blow, which most people do, as that will only force the mucous up the tubes...
The use of the saline spray should be used all winter at least the minimum times per day Sqad recommends... even more won't hurt. This in response to the extremely dry air in all of our homes in the winter from over warming the air.
One last bit... you really need to sniff upwards several times when injecting the saline to help it get to the tiny recesses in the sinus passages... (I speak from many years of experience).