Herbal supplements, if taken at the same time as prescription medicines, can create potential problems for the user. Unfortunately, there is very little scientific information available about the way herbs and drugs interact. The present paper deals with various herbal supplements and their interactions with medications.
Dwivedi, A. et al.
"Herbal Supplements (Haematanics) and their Interactions with Medications: An Overview,"
1, Article 142.
Available at: http://opensiuc.lib.siu.edu/ebl/vol2008/iss1/142