Dispense Interface for Use with a Drug Delivery Device for Delivery of Two or More Drug Agents

A dispense interface for use with a drug delivery device, said dispense interface comprising:

• a main outer body,
• an inner body positioned within at least a portion of said main outer body and configured for connection to a drug delivery device, said inner body defining a first inner body reservoir and a second inner body reservoir,
• a first piercing needle provided by said inner body, said first piercing needle in fluid communication with said first inner body reservoir and positioned for piercing a first cartridge contained within the drug delivery device,
• a second piercing needle provided by said inner body, said second piercing needle in fluid communication with said second inner body reservoir and positioned for piercing a second cartridge contained within the drug delivery device,
• a manifold positioned adjacent a generally flat surface of said inner body, said manifold comprising a fluid groove arrangement;
• a valve arrangement positioned between said inner body and said manifold,
• wherein said valve arrangement controls fluid communication of a first fluid contained in said first cartridge and a second fluid contained in said second cartridge by way of said fluid groove arrangement to a holding chamber of said inner body.