Rehmannia, Rehmannia glutinosa, is used to cool the blood, reduce fever, and rebuild the blood from blood loss. It is also used a kidney and liver tonic. 

Warning: Contraindicated with loss of appetite and diarrhea. 

Suggested Use: Take 1-3 full droppers (1-3mL) up to 3 times daily as needed. Drop directly under the tongue or place in 1/4 cup of water and drink.