Let me share with you the interaction warning with topamax and alcoholic beverages:
ethanol ↔ topiramate
Applies to: Alcohol (contained in alcoholic beverages) (ethanol), Topamax (topiramate)
GENERALLY AVOID: Topiramate, when coadministered with other CNS depressants including alcoholic beverages, may lead to excessive somnolence and other forms of nervous system depression.
MANAGEMENT: The patient should be informed to avoid alcohol or to use caution if these agents are coadministered, especially if performing hazardous tasks such as driving or operating machinery.
If these two substances cause you to "black out", then I would say stay away from the alcohol. While you might be okay to have one, too much alcohol can cause your breathing and heart rate to decrease below safe levels aside from the not remembering what you did the day after.
Best to learn to drink non alcoholic beverages and enjoy yourself than take the chance of hurting yourself.