1. The drug-containing unit (202, 500) attachable to a drug delivery device, the drug delivery device has a reservoir for a medicament comprising a first medicament (232, 424), wherein the drug-containing unit (202, 500) comprising: a needle cannula (206, 400, 502) having a sidewall (314, 416) at least one micro-hole (308, 310, 312, 408, 410, 412, 414, 504, 506) in the sidewall (314, 416) of the needle cannula (206, 400, 502), a flexible membrane (316) sealingly attached the inner surface (318) of the needle cannula (206, 400, 502), wherein the flexible membrane (316) comprises a second medicament (320, 420) between the flexible membrane (316) and a portion (314, 416) of the side wall having the at at least one micro-hole (308, 310, 312, 408, 410, 412, 414, 504, 506) .2. The drug-containing unit (202, 500) according to Claim. 1, wherein the second drug (320, 420) is in direct communication with the fluid communication with said at least one pinhole (308, 310, 312, 408, 410 , 412, 414, 504, 506) .3. The drug-containing unit (202, 500) for p. 2, wherein each pinhole (308, 310, 312, 408, 410, 412, 414, 504, 506) has a diameter of said at least one micro-holes (308, 310, 312, 408, 410, 412, 414, 504, 506) between 0.03 and 0.08 millimeters (mm) .4. The drug-containing unit (202, 500) according to any one of the preceding claims, wherein, after attachment to a drug delivery device, the needle cannula (206, 400, 502) is in communication with the fluid communication with a reservoir for the drug, with Thus in the process of dispensing pen1. Содержащий лекарственное средство модуль (202, 500), прикрепляемый к устройству доставки лекарственного средства, при этом устройство доставки лекарственного средства имеет резервуар для лекарственного средства, содержащий первый лекарственный препарат (232, 424), при этом содержащий лекарственное средство модуль (202, 500) содержит:игольчатую канюлю (206, 400, 502), имеющую боковую стенку (314, 416)по меньшей мере одно микроотверстие (3
