| abstract |
The present invention provides a microneedle device having a coating, which is effective even with a low molecular weight active compound and can sustain the effect of the drug for a long period of time, and a transdermal drug administration apparatus with microneedles. The microneedle device ( 5 ) has, on a microneedle substrate ( 8 ), a plurality of microneedles ( 6 ) that can pierce the skin, wherein the surface of the microneedles ( 6 ) and/or the microneedle substrate ( 8 ) is partly or entirely coated in fixed state with a coating carrier containing polyvinyl alcohol. The polyvinyl alcohol preferably has a hydrolysis degree of 94.5 mol % or more. Furthermore, the coating carrier can contain a drug. |