Active substance

Influenza vaccine (split virion, inactivated)

4 products from 3 companies contain this in Bulgaria.

4 prescription onlysuspension for injection

Prescription only

Efluelda TetrasuspPrescription onlysuspension for injectionPacks of 1, 5, 10 Sanofi Winthrop Industrie · Influenza vaccine (split virion, inactivated) · J07BB02 Fluarix Tetrasuspension for injection in pre-filled syringePrescription onlysuspension for injectionPacks of 1, 10 GlaxoSmithKline Biologicals SA · Influenza vaccine (split virion, inactivated) · J07BB02 VaxigripVaxigrip suspPrescription onlysuspension for injectionPacks of 1, 10 Sanofi Winthrop Industrie · Influenza vaccine (split virion, inactivated) · J07BB02 VaxigripTetrasuspPrescription onlysuspension for injectionPacks of 1, 10, 20 Sanofi Winthrop Industrie · Influenza vaccine (split virion, inactivated) · J07BB02

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.