My father aged 76 years is suffering from Mineaers disease since last 4 years. Earlier facing frequent attack of vertigo. Presently taking Betavert OD-24, 1 tab 3 times daily and Selgin 5 mg 1 tab daily and there is no such attack since last 10 months. But today morning he faced seviour attack of vertigo with dizinness and vomitting. After taking a ONDEM injection along with PAN IV his vomiting is stopped but presently  heavy dizinness is there and can not sit or even cannot change sleep position. Please advise.