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This lesson teaches you essential principles about toxicology. Topics like dose and dose-response, toxic effects, physiology, the role of chemicals in body functions, standards and guidelines for environmental and occupational exposure, absorption, distribution and excretion are discussed. In total, ToxTutor contains 15 sections, in which per section included topics and learning objectives are described. Often terms used are explained and regularly supported by examples (written text or videos). In some sections a link to another website is given in order to find additional information about the topic. At the end of each section a knowledge check is offered. You are asked to answer several multiple choice questions which you can check immediately on correctness. For each question, the answers are explained.

When starting the lesson ToxTutor, you go to the 15 sections in chronological order. However, it is also possible to view each section separately. The lesson lasts at least 3 hours. Some basic knowledge about anatomy and physiology is helpful. Acquiring a certificate is only possible when subscribing for the U.S. National Library of Medicine. Used language is English.



Original Authors:

Original affiliation, ownership:

NIH U.S. National Library of Medicine

Year of publication:

Charge for use or free:

Free of charge


Target group(s):

graduate students, OSH experts; or in training

Usefulness for non-OSH-expert professionals:

Has to be studied

Time demand to complete the lesson or course:

3 hours at least


The time demands are at least 3 hours but this can be more, dependent on the level of knowledge already present.

Intellectual property and copyright:

Before downloading, changing, disseminating and/or using the lessons and courses, please look carefully at the conditions given by the authors or owners of the materials related to copyright or creative common conditions or other conditions for the downloading, changing, further dissemination and kind of use of the materials (non-commercial vs. commercial).

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