This book is also not intended to be a catalogue of all the medications and supplements available for the horse. That would be impossible, as new products seem to appear almost daily. But by using this book to look for the ingredients listed on the product labels, you should be able to get an idea of what's in most of the products commonly used on horses and what they might actually do. One other thing to remember. Research is going on constantly.
Companies develop and release products prior to a full investigation of their effects.
Drugs and supplements may be safe for horses but are released for use prior to completely understanding what they do. This is particularly true for drugs and supplements used for the treatment of tendon injuries, ligament problems and arthritis. Thus, you should rely on the experience of your veterinarian in selecting appropriate treatments for any condition of your horse that requires medical therapy. Of course, in medicine, as in life, nothing works the first time, every time. If you believe everything that you read on product labels, this book is most likely not for you.