As I know that the drugs have some harmful affect to us, yet we are bound to take these in. For example, Paracetamol is a very common necessary drug that everyone has to take it but I think it also has terrible affect to our health. Antibiotics and Coartem are on one hand so much helpful to cure serious diseases like Malaria, Typhoid but on the other hand these are also harmful to us to a great extent. Cannot we expect some harmless drugs in future?
If the pharmaceutical companies would stop screwing around with Nature so much they would have safer drugs. All plants have medicinal compounds. And most of these plants have balancing and synergistic compounds that often, but not always, make the plant safe to consume despite its medicinal action. When people mess with this chemistry they alter this balance in the plant. Same reason I rarely bother with standardized extracts.
I have given various example of this previously such as the calming theanine that balances out the stimulatory caffeine of green tea. Or the blood clotting vitamin K that balances out the blood thinning coumarins of alfalfa.