Auto-injector and related methods of use

An injection device, comprising:

• a housing;
• a container disposed within the housing, the container including a first end and a second end;
• a piston sealing the first end of the container, wherein the piston is movable through the container, in a first direction from the first end toward the second end of the container, to dispense the medicament;
• and
• a needle having a piercing end, wherein the piercing end is configured to move from an undeployed position where the needle is entirely contained within the housing, to a deployed position where the piercing end of the needle extends outside of the housing;
• wherein movement of the container in a second direction, opposite of the first direction, is configured to cause the piercing end of the needle to move from the deployed position to a third position where the needle is entirely contained with the housing.

A method of operating an injector, the method comprising:

• activating the injector to cause a piercing end of a fluid conduit entirely enclosed within a housing of the injector, to extend outside of the housing and pierce a user;
• wherein activating the injector further causes:
• (1) medicament to be dispensed from a container into the fluid conduit, while the piercing end of the fluid conduit is disposed within the user, wherein the container is entirely disposed within the housing;
• and
• (2) the container to move relative to the housing to cause the piercing end of the fluid conduit to retract from the user entirely into the housing.

A method for delivering a medicament from an injector, the method comprising:

• upon activation of the injector by a user:
• (1) extending a piercing end of a fluid conduit entirely enclosed within a housing of the injector, to outside of the housing to pierce the user;
• (2) dispensing medicament from a container into the fluid conduit, while the piercing end of the fluid conduit is disposed within the user, wherein the container is entirely disposed within the housing;
• and
• (3) moving the container relative to the housing to cause the piercing end of the fluid conduit to retract from the user entirely into the housing.