I read your question and I understand your concern. From your description the neurologist must have considered your episodes as related to anxiety, a panic disorder. They are not due to your epilepsy treatment (on the other hand in epileptic patients anxiety or mood disorders are found more often than in the general population). Regarding your questions on Betacap, it is a drug which causes neither weight gain nor mouth dryness, do not fear about that, usually those effects are linked with anti-depressants. It is a drug belonging to the beta blockers class and apart from being used for panic disorder (like in your case) it is also used to treat high blood pressure, so if that is an issue as well it should help. I hope to have been of help.