He can find help in naturopathy, TCM (traditional Chinese medicine), Ayurveda, or clinical herbalism. I don't know if he can afford it though, or would want to go.
Shaunashrum, I am praying for you
Shaunashrum, may God be with your husband Gabe and bring him to salvation if he's not already saved. If he is saved may God reveal Himself more to him, bringing him closer and guiding him along the narrow path. May God fill him to overflowing with the Holy Spirit and let him live in surrender and obedience, that he bears much fruit. May He heal Gabe in every way and bless your marriage. May God help and strengthen you support your husband. May He bless you with unwavering faith as you trust in Him. In Jesus's name. Amen.