Hi, Cuppacoffee,
Welcome to the forum! There are lots of parents in here, many with teenagers, so you have lots of company.
What kind of seizures is your daughter having?
I was on Topamax. I couldn't think, food was repulsive to me and tasted like metal, slept all the time, and was deeply depressed. It's a hard drug for lots of folks. You'll get an earfull about it in here.
An increase in seizures wasn't listed in the Topamax package insert. But that doesn't mean it doesn't happen. Side effects happen all the time that doctors don't report to the FDA, and it doesn't make it into the literature.
I didn't find anything on "Ask A Patient" either, but that could be because no one had inputted it yet.
Ask a Patient (A site where actual patients share their experiences with medications)
Topamax Package Insert
If your daughter's seizures have been increasing, it is also possible it is a natural progression. Seizures sometimes get worse over time until they are successfully treated,. Sometimes they can escalate pretty fast.
While her seizures aren't under control, it's a good time to explore any other possible causes for the seizures - cardiac, diet, allergy, etc. In the majority of cases no cause is ever found, but if you can find a cause and fix it, it may save her from a lifetime of these anti-seizure drugs. They aren't a picnic, but are necessary if seizures are still happening.
Good luck on the video EEG. Nothing hurts, but it's pretty boring. They'll keep her in bed, except to use the restroom. Your hospital may or may not let her use electronics like a laptop or iPod. They probably won't let her use earbuds or headphones - they interfere with the electrodes. So take lots of games, books, etc. Take about a half cup of any kind of oil with you to the hospital (olive, baby, canola, etc.) It's to take out the glue at the end of the week. Rub it into her scalp for about 20 minutes, especially on the little balls of glue. It'll get it all out.
Good luck. Will you let us know how she is doing?