Starting and stoping of treatment specially in Psychiatric cases must be done by doctors. Do not self medicate Consult your doctor and make him decide . I can suggest you that u can start homoeopathic treatment for your problems along with modern medicine. It will help to reduce doses of alopathy medicine. Along with this u must Consult Psychologist for counselling , it will help you to learn cope up mechanism in different situation s. You can Consult Me online or offline for both or any help.

Escitalopram does not come in 0.5mg strength. Ideally you should consult your Psychiatrist before stopping the medicine. You can try to stop Clonazepam first. Stopping escitalopram on your own is not advisable.

No, you should not stop both medicine in such case. Continue escetalopram and take clonazepam as and when required basis(when you feel anxious or panic). You should also take psychotherapy so that chances of panic attacks in future become less and medication can be stopped.