Who is covering the bill?
There are many ways to play this all of which should leave you with extra inventory for a rainy day. Always have inventory.
Lately I got "stuck" with single use 200 mg vials for each 60 mg injection. However as shared above you can use them many more times than a single use [hint].
2000 mg vial....? If you practice proper aseptic technique and swab swab swab I had no problems drawing from same bottle for 9 months.