Well, magic can remove the physical substance influence but the problem lies more in the psychological realm and magic can't cure that. It's either Xe'Nedra to overcome it or it's permanently part of her now. It one questions why she took her dagger again and sets out to rejoin the band. She had always been a thrillseeker and sexually active, she got an adrenaline rush from combat. But she gained new/different rushes after the band disbanded.