Training Herbalists Since 1989

32 hours CE Credit with Certificate


The CD-Set, Notes, and Supplemental Readings and Texts may be purchased separately without enrollment in the course and with no additional tuition fee.

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  • Learn the common side effects of 35 of the top herbs in clinical practice
  • Learn the basic principles and problems of drug-herb interactions
  • Learn the importance of screening for iatrogenic (doctor-induced) disease when assessing a patient.
  • Learn the principles and problems of toxicity of essential oils.
  • Learn the principles and problems of working with elders or other patients with frail constitutions.

Although harm caused by herbal medicines is uncommon, any herb strong enough to act as a medicine may also have an adverse effect if given for the wrong condition, the wrong patient, in the wrong dose, or at the wrong time. In the modern era, even an otherwise harmless herb may cause harmful interaction with a prescription or over-the-counter drug. In this course you will learn the principles of herbal toxicity and drug-herb interactions, the possible side effects or harms caused by 35 of the most important medicinal herbs, and the toxicology of essential oils. Also included is a section on “the fragile patient” and the need to use gentler herbs in lower doses for elders, children, or patients who are weak. 


With this course you receive 12 audio CDs, 50 pages of notes, and 125 pages of supplemental readings. Students enrolled in our courses are also eligible for a 10% discount on purchases at Mountain Rose Herbs.


 Each lesson includes an average or 3 hours of lecture and readings.

 Lesson 1. Introduction to Adverse Effects and Drug-Herb Interactions

Lesson 2. The Milieu of Iatrogenic disease

Lesson 3. The Adverse Effects of Common Herbs I (8 herbs)

Lesson 4. The Adverse Effects of Common herbs II (8 herbs)

Lesson 5. The Adverse Effects of Common Herbs III (9 herbs

Lesson 6. The Adverse Effects of Common Herbs IV (10 herbs)

Lesson 7. The toxicology of essential oils

Lesson 8. The Fragile Patient: Considerations in the Elder patient

Enrollment for Credit

To enroll in the course, receive faculty support, and to earn the Continuing Education certificate, follow these steps:

  1. Purchase the CD-set in the CD-ROM Section of our Online Store The CD-Rom set may be purchased without further enrollment in the course or any tuition payment..
  2. When you receive it, open the data disk file, and print out the application form. Send it in with a $25 application fee. This entitles you to student support and faculty contact for eight weeks after the enrollment is received while maintaining normal progress. Normal progress through this course is one lesson per week. Students falling behind may request an extension.
  3. Read the instructions for obtaining CE credit in the read-me-first file with the notes.
  4. Look over the CE questions and review them before listening to the disks.
  5. Complete any assignments or readings and answer the CE questions for each disk.
  6. Tuition of $120 is paid upon completion of the the course and the CE questions.
  7. You will then receive a certificate reflecting 32 hours of CE credit.


Paul Bergner is director of the North American Institute of Medical Herbalism. He has edited the Medical Herbalism journal since 1989. He completed more than 50 semester hours of doctoral level studies at the National College of Naturopathic Medicine in the 1980s, including the full sequence on Chinese Medicine offered to the ND students. He was Director of clinical education at Rocky Mountain Center for Botanical Studies from 1996-2003, and is currently clinic director at the Evergreen Center in Boulder, CO. Between the two schools, he has trained 240 students through a one-year internship in clinical herbalism and clinical nutrition. He is the author of seven books on medical herbalism, clinical nutrition, and naturopathic medicine. Paul has practiced natural medicine for more than 40 years. He is a professional member of the American Herbalist Guild.  Paul has been collecting case reports on the adverse effects of herbs since 1978.

Disk Contents


About This Course
  • Hours: 32
  • Term: 8 weeks
  • Cost of materials: $160
  • Tuition cost (optional): $120
  • Enrollment fee (optional): $25