The drugs normally used to treat CPP are generally classified as "GnRH agonists." ( GnRH= Gonadotropin Releasing Hormone.) Lupron and Synarel are brand-names, made by specific pharmaceutical companies.  As not every brand is available in every country, I would probably ask about "GnRH agonists," rather than asking for a specific name.

There are, apparently, also a number of different types of GnRH agonists.  From the names, they must have a different base chemical ingredient, though I'm not sure what the difference is in how they perform.  Synarel is "nafarelin acetate."  Lupron is "depot leuprolide."  There is also "Leuprorelin acetate," "Deslorelin," and "Histrelin."  I'm sure there are others, but, as I said, I am not certain what the basic difference is between them.

In terms of practical application, though, one of the main things to look for is frequency of administration.  Lupron Depot is normally injected every 28 days, or so.  There is also a form of the drug that has to be injected every day.  Synarel nasal spray has to be administered 8 times/day (2 sprays in each nostril, twice a day!)  Obviously, the more frequent the dose, the more possible problems with non-compliance or forgetfulness.  As it is extremely important, especially with GnRH agonists, to maintain proper compliance (otherwise, the situation could actually end up being worse than without treatment), if your child ends up being prescribed a GnRH agonist for CPP, you'll want to make sure they prescribe you something that you only have to take monthly.

P. S. Val, How did you make out at your doctor's appointment today?