Vitamin C IV (Intravenous) 50g (grams)

My aunt’s oncologist recommended her intravenous (IV) Vitamin C therapy alongside her chemotherapy to provide support and mitigate the treatment’s negative side effects.
The minimum recommended dose is 50 grams.
We have tried everywhere to find this dosage but without success.
Does anyone know where we can purchase 50g IV Vitamin C?
Thank you, and we would be very grateful for any help.

I would contact the dr & let them know you are having problems.