Iontophoresis device and drug unit

Abstract

Herein disclosed is an iontophoresis device suitable for effective use of a drug supported on a drug support. A donor electrode-printed portion ( 6 ) and a reference electrode-printed portion ( 7 ) are arranged on a backing layer ( 4 ). The backing layer is provided with, at the periphery, an adhesive film ( 3 ) for fixing a pharmaceutical preparation to an application site. The both electrode-printed portions ( 6 ), ( 7 ) are electrically connected to a current-generating portion (Ia) through a conductive snap connector (Id). The drug support ( 14 ) is removably joined with a conductive layer ( 11 ) formed on the electrode on the side of the donor electrode-printed portion ( 6 ). The drug support ( 14 ) is subjected to a drug diffusion-inhibitory treatment ( 30 ).

1 . An iontophoresis device comprising a drug-dissolving portion having a function of activating a drug; and a drug unit, which is subjected to at least one treatment selected from a drug diffusion-inhibitory treatment and an air-exhausting treatment, having a drug support removably joined with the drug-dissolving portion.  
     
     
         2 . The iontophoresis device according to  claim 1 , wherein the drug diffusion-inhibitory treatment includes a resin member and/or a thermally compressed portion disposed at the periphery of the drug support.  
     
     
         3 . The iontophoresis device according to  claim 1 , wherein the air-exhausting treatment is to form an air vent hole at the periphery of the drug support.  
     
     
         4 . A drug unit comprising a drug support for supporting a drug; a first cover arranged on one side of the drug support; a second cover arranged on the other side of the drug support; and a member for removably fixing the first and second covers to the drug support.  
     
     
         5 . The drug unit according to  claim 4 , wherein the first cover has an opening for supplying a drug to the drug support.  
     
     
         6 . The drug unit according to  claim 4 , further comprising a drying component arranged therein.  
     
     
         7 . The drug unit according to  claim 4 , wherein at least one of the first and second covers is subjected to a drug adsorption-inhibitory treatment.  
     
     
         8 . The drug unit according to  claim 4 , wherein the drug support is subjected to at least one treatment selected from a drug diffusion-inhibitory treatment and an air-exhausting treatment.  
     
     
         9 . The drug unit according to  claim 7 , wherein the drug adsorption-inhibitory treatment is a treatment with silicone or Teflon.  
     
     
         10 . The drug unit according to  claim 8 , wherein the air-exhausting treatment is a stripe coating treatment of the member.  
     
     
         11 . A drug support comprising a porous member, which is subjected to a drug diffusion-inhibitory treatment and/or an air-exhausting treatment; and a drug incorporated into the porous member.  
     
     
         12 . The drug support according to  claim 11 , wherein the drug diffusion-inhibitory treatment is to form a resin member at the periphery of the porous member.  
     
     
         13 . The drug support according to  claim 11 , wherein the drug diffusion-inhibitory treatment comprises thermally compressing the periphery of the porous member to form a thermally compressed portion.  
     
     
         14 . The drug support according to  claim 11 , wherein the air-exhausting treatment is to form an air vent hole at the periphery of the porous member.