Method for producing primary packaging (1, 101, 201) having an integrated septum (2, 102, 202), characterised by the following method steps: a) providing a septum (2, 102, 202), b) providing an injection-molding die (3, 103, 203) having two die halves (4, 5; 104, 105; 204, 205) that can be moved relative to one another, wherein one die half (4, 5; 104, 105; 204, 205) comprises a holder (8, 108, 208) for the septum (2, 102, 202), and the other die half (4, 5; 104, 105; 204, 205) comprises a stamp (12, 112, 212), c) positioning the septum (2, 102, 202) in the injection-molding die (3, 103, 203), d) moving the two die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203) such that a cavity (6, 106, 206) is formed that corresponds to the shape of the primary packaging (1, 101, 201) to be produced, wherein the stamp (12, 112, 212) and the holder (8, 108, 208) are pressed against one another when the material is injected, such that the septum (2, 102, 202), which is located at least in section between the stamp (12, 112, 212) and the holder (8, 108, 208), is in a pressed-in, pretensioned state, e) injecting a material into the cavity (6, 106, 206) in the injection-molding die (3, 103, 203) via an injection opening (7, 107, 207) in one of the die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203), the two die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203) pretensioningly holding the septum (2, 102, 202) therebetween, and a rim (11, 111, 211) of the septum (2, 102, 202) being overmolded by the material, a region of the septum (2, 102, 202) in contact with the two die halves (4, 5; 104, 105; 204, 205) remaining free of material, wherein the septum (2, 102, 202) is also overmolded with material from the front side thereof, f) cooling the injected material while maintaining a holding pressure, as a result of which the primary packaging (1, 101, 201) is formed having an integrated septum (2, 102, 202), g) moving the two die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203) such that the produced primary packaging (1, 101, 201) having the integrated septum (2, 102, 202) can be removed from the injection-molding die (3, 103, 203), and h) removing the produced primary packaging (1, 101, 201) having the integrated septum (2, 102, 202) from the injection-molding die (3, 103, 203). a) providing a septum (2, 102, 202), b) providing an injection-molding die (3, 103, 203) having two die halves (4, 5; 104, 105; 204, 205) that can be moved relative to one another, wherein one die half (4, 5; 104, 105; 204, 205) comprises a holder (8, 108, 208) for the septum (2, 102, 202), and the other die half (4, 5; 104, 105; 204, 205) comprises a stamp (12, 112, 212), c) positioning the septum (2, 102, 202) in the injection-molding die (3, 103, 203), d) moving the two die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203) such that a cavity (6, 106, 206) is formed that corresponds to the shape of the primary packaging (1, 101, 201) to be produced, wherein the stamp (12, 112, 212) and the holder (8, 108, 208) are pressed against one another when the material is injected, such that the septum (2, 102, 202), which is located at least in section between the stamp (12, 112, 212) and the holder (8, 108, 208), is in a pressed-in, pretensioned state, e) injecting a material into the cavity (6, 106, 206) in the injection-molding die (3, 103, 203) via an injection opening (7, 107, 207) in one of the die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203), the two die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203) pretensioningly holding the septum (2, 102, 202) therebetween, and a rim (11, 111, 211) of the septum (2, 102, 202) being overmolded by the material, a region of the septum (2, 102, 202) in contact with the two die halves (4, 5; 104, 105; 204, 205) remaining free of material, wherein the septum (2, 102, 202) is also overmolded with material from the front side thereof, f) cooling the injected material while maintaining a holding pressure, as a result of which the primary packaging (1, 101, 201) is formed having an integrated septum (2, 102, 202), g) moving the two die halves (4, 5; 104, 105; 204, 205) of the injection-molding die (3, 103, 203) such that the produced primary packaging (1, 101, 201) having the integrated septum (2, 102, 202) can be removed from the injection-molding die (3, 103, 203), and h) removing the produced primary packaging (1, 101, 201) having the integrated septum (2, 102, 202) from the injection-molding die (3, 103, 203).