The Half Somersault or Foster maneuver for vertigo should help with Benign paroxysmal positional vertigo (BPPV) if done correctly.
The half somersault maneuver, like any other BPPV maneuver, can make you feel more dizzy or sick for a short period of time afterwards. Sometimes people do get sick and vomit, so make sure you are prepared to stay and home and relax after the treatment.
Each position should be held for about 30 seconds or until the spinning stops. Sometimes it has to be performed 3-5 times in a row, but it is recommended to wait 15 minutes in between each treatment session.