I am an 18 year old female who has recently been diagnosed with positional vertigo. With this, I am very dizzy even while laying down, I have a killer head ache that wont go away, and the medication ( betahistine dihydroc 16mg ) makes me feel sick to my stomach even when I take it with food. My main question here, is am I aloud to advil or tylonel with this medication to get some relief of this head ache ?!