Active substance

Poliovirus Type 1 Antigen (formaldehyde Inactivated), Poliovirus Type 2 Antigen (formaldehyde Inactivated), and Poliovirus Type 3 Antigen (formaldehyde Inactivated)

2 products from 2 companies contain this in United States.

2 prescription onlyInjection, Suspension

Prescription only

Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.