Treatment for vertigo. He can follow.

My brother was diagnosed with bppv in April 2020 as he was experiencing ringing in ears, head reeling, breathing difficulties and pressure fluctuations with position change. He took several medicines like Stugeron, Vertin, Myotop, Audiovit and Renerve after consulting neurologist, ENT and orthopedic surgeon. The problem started started with a sudden jerk caused to the upper neck as he turned his head to look up. He felt stretches and pull at the back of his head and everytime he did Epley Maneuvre he felt marginally better although stiffness continued. Off late he is experiencing a relapse of the aforementioned symptoms and he is eager to know what medications he can try and what other maneuver he can follow.