What is the most used chemical for medicine?

Question: What is the most used chemical for medicine?
- Keywords:
  chemical,
  medicine,
  treatment
Asked by anon-321060 to Mark on 14 Mar 2022.
- Mark Ridgill answered on 14 Mar 2022:
  
  I’d say that paracetamol is one of the most used medicines – most of the elderly take it for aches and pains and it’s the active ingredient in Calpol.

Question: What is the most used chemical for medicine?