vitamin b12 1000ug inject CYANOCOBALAMIN INJECTION, USP 10,000mcg/10mL (1,000mcg/mL) 10mL VIAL 250 mL and 500 mL vials Provides 1 Vitamin B12 1000 Mcg Injection
Description
This is not one of the harsh preservatives that cause reactions

Neurological symptoms are particularly associated with vitamin B12 deficiency and can be serious

So, Id better wait ~2 months to retry

No heating should be required at typical use concentrations

A 0.5mg dose from a 2.5mg/ml vial requires 20 units on your syringe