Escitalopram can have sexual side effects - however, the sexual side-effects get better once you are off the medication - in some cases even if you decrease the dose. In any case you need to balance between the between benefit versus side effects. As far as the issue of dependency is concerned, you could get dependent on clonazepam but usually not to escitalopram. In general, escitalopram and clonazepam is a good combination for panic disorder. There are treatment modalities other than medications that are known to be effective, particularly a type of therapy known as cognitive behavioural therapy. If you have a trained therapist who can do this kind of therapy, it might be beneficial for you in long term and it is possible that you could go off medication.