Thanks for using Healthcaremagic,
After going through the available details of your husband, spells of dizziness
Common causes include ear problem like Meniere's disease, Benign Positional vertigo, even drop in blood pressure on standing (Postural hypotension
), and brain issues.
Investigations like Audiometry
, CT scan, and MRI brain may be required
He had episode of vomiting and diarrhea,which may cause low blood pressure and dehydration
Dimenhydrinate (Gravol) is used for motion sickness
but you may want to visit a doctor for proper assessment of cause and treatment accordingly.
In the meantime he should take rest in comfortable position avoiding frequent changes in postures and keep him well hydrated.
Hope this information is useful.
Dr.Akhilesh Dubey M.D.