Drug Shortages During COVID-19 Pandemic

I am a goup member for a Final Paper on drug shortages during the COVID-19 pandemic.  Each section must be clearly identified.  My two individual sections to cover for the paper are:

1. The product(s) and their market (hydroxychloroquine, midazolam, and fentanyl):  Which segment of the pharmaceutical industry do these products belong to?  How big is the segment?  How big are the product’s share of their industry?  Who are the major producers?

2. The Supply Chain that produces and delivers the products:  Key players in the supply chain and their roles?  Raw material suppliers?  Transporters?  Wholesalers/Distributors?  Retailers?  What value do they add?