Botanical medicine is the oldest, safest and most widely used form of medicine without side effects experienced with use of pharmaceutical prescription drugs.
Some of the prescription drugs are made of part of plants, i.e aspirin is made from White willow bark. However, isolating the component of herbs, and concentrating it into a powerful medicine you are more likely to create side effects whereas using the whole herb you preserve the protective power of the plant and unnecessary complications.
Herbal preparations are used for both prevention and treatment of your problems. They treat the cause not just the symptoms of the disease.