Three-chambered autoinjector

An autoinjector having three chambers, the autoinjector comprising:

• a) a housing having a forward end and a rear end;
• b) a rear plunger moveably situated within the housing;
• c) a separation assembly moveably situated within the housing, the separation assembly forwardly situated with respect to the rear plunger;
• d) a separation plunger moveably situated within the housing, the separation plunger forwardly situated with respect to the separation assembly;
• e) a first chamber for a liquid composition, the first chamber having a variable volume, the first chamber forwardly confined by the separation assembly and rearwardly confined by the rear plunger;
• f) a second chamber for a second medicament, the second chamber having a variable volume, the second chamber forwardly confined by the separation plunger and rearwardly confined by the separation assembly;
• g) a third chamber for a first medicament, the third chamber having a variable volume, the third chamber rearwardly confined by the separation plunger;
• h) a needle having a needle length, a forward end and a rear end, the needle being moveable from a needle storage position in which the needle is situated within the housing to a needle fully extended position in which the needle reaches a maximal extension out of the forward end of the housing;
• and
• i) an activatable power assembly for moving the rear plunger forwardly within the housing.