This is quite dangerous because mixing the herbs with modern drugs can lead to having implications each of which has an impact on the functionality of the drugs. In its natural form, some herbs interact with other drugs and either increase their side effects or lessen the efficacy of the drug being consumed. For example, there are some herbs which will increase your metabolism of drugs in your body, and there are those which will slow down your metabolism and therefore the drugs accumulate in your body causing more harm. Such relations can be lethal when one is on prescribed drugs for chronic illnesses such as heart ailment or diabetes. As it is often advisable to ask the doctor before integrating the use of herbs and other modern medication.