While taking lexapro (escitalopram) 10mg for anxiety disorder, can i take flunarizine 5 mg at once when having migraine? can lexapro (escitalopram) itself prevent me from migraine?

Yes: SSRIs e like Lexapro (escitalopram) can and in some people help decrease the frequency of migraines

Yes, you can, but: once a diagnosis of migraine has been made, effective management of migraine involves three specific strategies: 1) patient education, 2) nonpharmacological management, and 3) pharmacological (medical) management. See an orofacial pain or headache specialist for evaluation and professional management. Lexapro (escitalopram) is helpful for migraine prevention.