My Mum started on 30mg about a month ago and has just been upped to 60mg. She is not sleeping at night despite being exhausted, sweating a lot but the worst is the vertigo. Only started same time she moved upto 60mg so we are linking it with that. She's dizzy on standing, feels like she's on a moving ship. When her eyes are closed she feels like her head is moving. Is this normal? Anyone else had this?