Why "Shame on Amazon"?

If a book is published the publisher is entitled to advertise it on multiple market places (including Amazon). At least they included an 'editorial review':
Disclaimer. We have made every effort to make certain that all information is factually correct, comprehensive, and up-to-date. However, this book should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professionals before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.

Unfortunately there is, as yet, no cure for stupid.