Is it possible to still get panic attacks after taking Hydroxyzine?

I've been prescribed Hydroxyzine for my panic attacks and I'm curious about your experiences. I'm wondering if it's possible to still have non-paradoxical panic attacks after taking Hydroxyzine. For example, is it possible to initially feel calm after taking it, but then still experience a panic attack if new stressors arise? If you've had panic attacks both with and without Hydroxyzine, how did the experiences differ for you?