The short version
15 companies supply this market — deep enough that no single failure threatens the supply. The brand price has held steady around $5.90 per mL over the past year. It is in shortage right now — FDA lists the reason as “other”. Put together: worth watching — several of the pressures that precede supply trouble are present at once.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.