General Brazilian
tonturas, tonteios
Most commonly used term in Brazilian Portuguese
Rio de Janeiro
tonturas, vertigens
Common usage; sometimes called 'desmaios leves'
São Paulo
tonturas, episódios de vertigem
Standard usage in medical and formal contexts
Portugal
tonturas, vertigens, episódios de tontice
'Tontice' is more colloquial in European Portuguese