Is ban lan gen safe for Lupus patients to take?

I hear that this is a great herb (made into a tea) that helps with respiratory problems and skin issues so I'm curious if it's okay to take. I'm having some asthma, eczema and joint pain and I'd love to try something new. I know that echinaecea causes flare ups in lupus patients, and from experience it usually makes me sick so I'm approaching this cautiously.