A device for mixing a liquid product and a solid to form an injecting product and for administering the product, including - a housing having a gripping portion for gripping it with a hand, - a receiving means , wherein the housing is in threaded engagement with the receiving means , - a two-chamber ampoule which is accommodated by the receiving means , which in particular is introduced into the receiving means from the distal end, wherein the two-chamber ampoule has a bypass , a first plunger and a second plunger , wherein the two plungers bear sealingly against a hollow-cylindrical housing portion of the two-chamber ampoule and can be displaced along the housing portion , wherein the two-chamber ampoule has the bypass in the region of the housing portion and forms an outward bulge and the bypass is axially longer than the first plunger , and - an outer sleeve having a gripping portion for gripping with another hand or an outer sleeve in the form of a gripping portion for gripping with another hand, wherein the outer sleeve extends over a part of the length of the receiving means and/or the two-chamber ampoule and the housing is arranged between the outer sleeve and the receiving means and is moveable relative to the receiving means into the outer sleeve , wherein the movement is a combined axial movement and rotary movement and by said movement the liquid product and the solid are mixed in the two-chamber ampoule to give the injecting product, wherein for mixing purposes a pressure is exerted on the second plunger , which is transmitted by way of the liquid product between the first plunger and the second plunger to the first plunger , wherein the second plunger is displaced in the axial direction to the first plunger into the region of the bypass , wherein when the first plunger is completely in the region of the bypass the liquid product flows past the first plunger through the bulge of the bypass and mixes with a solid arranged distally from the first plunger to give the injecting product. - a housing having a gripping portion for gripping it with a hand, - a receiving means , wherein the housing is in threaded engagement with the receiving means , - a two-chamber ampoule which is accommodated by the receiving means , which in particular is introduced into the receiving means from the distal end, wherein the two-chamber ampoule has a bypass , a first plunger and a second plunger , wherein the two plungers bear sealingly against a hollow-cylindrical housing portion of the two-chamber ampoule and can be displaced along the housing portion , wherein the two-chamber ampoule has the bypass in the region of the housing portion and forms an outward bulge and the bypass is axially longer than the first plunger , and - an outer sleeve having a gripping portion for gripping with another hand or an outer sleeve in the form of a gripping portion for gripping with another hand, wherein the outer sleeve extends over a part of the length of the receiving means and/or the two-chamber ampoule and the housing is arranged between the outer sleeve and the receiving means and is moveable relative to the receiving means into the outer sleeve , wherein the movement is a combined axial movement and rotary movement and by said movement the liquid product and the solid are mixed in the two-chamber ampoule to give the injecting product, wherein for mixing purposes a pressure is exerted on the second plunger , which is transmitted by way of the liquid product between the first plunger and the second plunger to the first plunger , wherein the second plunger is displaced in the axial direction to the first plunger into the region of the bypass , wherein when the first plunger is completely in the region of the bypass the liquid product flows past the first plunger through the bulge of the bypass and mixes with a solid arranged distally from the first plunger to give the injecting product. <EOS>