There is a very specific guide for this, and it is the Professionals Handbook of Complementary & Alternative medicines. It lists all herbs and tells you dosages and contraindications to prescribed medications and medical conditions. You must be able to decipher medical language as it is written for medically oriented folks. You also must know the category of the medication you are taking, for example you must know that aspirin is an anticoagulant.
One of my favorite points of this book is that it gives you not just one name for an herb, but many other names that it may be known by. For example under "Goldenseal" they also have Eye Balm, Eye Root, Goldseigel, Ground Raspberry, Indian Eye, Indian Turmeric, Jaundice Root, Yellow Paint, Yellow Puccoon, and Yellow Root. They then list the taxonomy and the common trade names.
So maybe this is useful, maybe it is confusing. It is, however, quite thorough. German E Commission as Morin mentions is also excellent and it will tell you what is approved and what is not approved.
P.S. Both books can be found on Amazon
Sent: Mon, August 8, 2011 6:16:58 PM
Subject: [SCA-Herbalist] Herbs and Modern Medicine Side Effects
Greetings Ladies and Lords!
I was wondering if anyone has a good resource on where I can find how herbs react with modern medicines.
For example, I know that rosemary (especially oil) should be used with caution in patients with blood pressure issues and on blood pressure medicines. But, where can I find further information on the herbal interactions with modern medicines?
I appreciate your guidance!