Sanofi
PLUNGER AND DRUG DELIVERY DEVICE

Abstract:

The present specification relates to a plunger configured to transmit a force from an energy source to a piston of a primary container, the plunger comprising a plunger rod configured to be subjected to the force from the energy source, the plunger rod having an inner surface forming a cavity, wherein a support element adapted to constrain the energy source within the cavity protrudes radially inwards from the inner surface into the cavity.