It should be safe while pregnant and nursing.  (ALWAYS consult with your physician before starting any medicine- natural or otherwise).  The flavor of this is somewhat earthy, with a strong hint of spearmint and sweet with honey.  Ingredients are organic, made with purified water and local raw honey.  

Ingredients: local raw honey, elderberries*, nettle*, goldenrod*, alfalfa*, spearmint*, astragalus root*, rosehips*, and hibiscus*.  *Organic