Patient is 78 y/o female with h/o BPPV who came complaining of vertigo, she ha

 Patient is 78 y/o female with h/o BPPV who came complaining of vertigo, she has had this episodes in the past, last one was a year ago and now it has returned, she denies any trauma. On the physical examination there is evidence of nistagmus horizontal bilaterally, We ordered Meclizine 25mg PO once a day, we will reevaluate in one week.  
Diagnosis: H81.10 (BPPB)
Include latest guidelines for treatment, use APAP 7 format and scholarly references no older than 5 years.