Flowers and medicinal plants

Hello my friends I'm Francesca, today I want to speak you of medicinal plants.
Many drugs that doctors prescribe to patients are made using plants.
In the laboratories of pharmaceutical companies are drawn from parts of plants (roots, bark, leaves, flowers), semi-active substances very effective in fighting disease.
With plants and herbs of various kinds are preparing cough syrups, , drops and other medications that your doctor prescribes.
Yet think how strange! Almost all medicinal plants are poisonous and can not eat because you can even die. When, however, these plants are used in small doses and determined by the doctor, help you heal.