An apparatus includes a housing, an energy storage member, a carrier, a medicament container, and a delivery control mechanism. The housing defines a gas chamber configured to receive pressurized gas from the energy storage member to pressurize the gas chamber. The carrier has a proximal surface that defines a portion of the gas chamber. The medicament container is coupled to the carrier and has a distal end portion coupled to a delivery member. The medicament container contains at least 5 mL of medicament and includes an elastomeric member that seals the medicament within the medicament container. The delivery control mechanism is coupled to a proximal end portion of the medicament container and includes a flow restriction member for regulating a pressure supplied by the gas chamber and entering into the medicament container that acts on the elastomeric member.

An injection monitoring module comprises a main body, central bore, and central axis, and magnetic field production means located on the main body. An injection monitoring system comprising at least one magnetic sensor is translatable along the central axis and located within the bore. The monitoring module comprises a rotational stop means preventing rotational movement of the monitoring system about the central axis during dose selection. The stop means comprises a rotationally fixed coupling in parallel to the central axis, connecting the monitoring system to a body of an injection pen, and permitting translational movement of the monitoring system from a first monitoring position to a second monitoring position, during injection, and vice-versa, after injection. The stop means comprises relative positioning means selectively preventing, or allowing, translation of the monitoring system proximally from a first, collapsed position, to a second, deployed position.

An apparatus includes a housing, an energy storage member, a carrier, a medicament container, and a delivery control mechanism. The housing defines a gas chamber configured to receive pressurized gas from the energy storage member to pressurize the gas chamber. The carrier has a proximal surface that defines a portion of the gas chamber. The medicament container is coupled to the carrier and has a distal end portion coupled to a delivery member. The medicament container contains at least 5 mL of medicament and includes an elastomeric member that seals the medicament within the medicament container. The delivery control mechanism is coupled to a proximal end portion of the medicament container and includes a flow restriction member for regulating a pressure supplied by the gas chamber and entering into the medicament container that acts on the elastomeric member.