Dr just gave me viladozone and told me to stop 20 mg daily buspar (buspirone). do i need to wait for buspar (buspirone) to clear from my system first? if so how long?

At least 24 hours: The half life of Buspar (buspirone) and it's active metabolite is 3 and 6 hours respectively. This means that very little will be present 24 hours after stopping it. There is a possible interaction between Buspar (buspirone) and viladozone so it's wise to wait at least 24 hours after stopping Buspar (buspirone) before starting Viladozone.