my mother is 72 years old. Three years ago MRM of left breast was done when a malign tumor was detected.Before radiation therapy she complained of vertigo.Her CAT scan was clear. her ear examination also did not reveal any thing. She took Betahistamine Dihydrochloride 24mg for week. thereafter every four or six moths the vertigo resurfaces and goes at its own for which she is not taking any medicine except but to take rest. The other medicines she is taking ,letrozole 2.5 mg, Amlodipine 5 mg & Ramipril 5mg besides Rebeprazole in the morning.