I am going to refer the word "Drugs" as chemical medicines.
I know some Muslims dont get any medicine if it contains any chemicals. So they get %100 natural medicines only.
So some Muslims believe chemicals are haram. That is why they dont even use any colone or parfume but they use only those natural esense oils in small bottles.
But of course there are lots of Muslims take medicine and they believe it is necessary (and not haram) to take any medicine if it is good for your health.
I am not even talking about addictive/illegal drugs such as marujanna, cocain etc. Of course every Muslim would be against to those drugs. Because it says in Quran that you should not use anything which falsifies your conscious.