sorry about your husband.I dont know about HBP but I suffer from Menieres & get extreme incapacitating vertigo. The only thing that helps me with spells is taking Dimenhydranate ( motion sickness pill thats over the counter) I need to take it daily. wish I had more advice to give. no matter what happens dont give up. I realize your frustrating pain & just remember you are not alone. keep researching & hoping and maybe you will eventually find an answer.Good Luck!