To provide a catheter dynamically and simply changing the positional distribution of the amount of a pharmaceutical to be administered.

This catheter, for guiding the pharmaceutical into the body of the mammal including a human, includes a pharmaceutical discharge section 1 discharging the pharmaceutical in the body, a pharmaceutical path 2 guiding the pharmaceutical from a pharmaceutical supply side to the pharmaceutical discharge section 1, and gate mechanisms 11 and 12 provided at least one of the pharmaceutical discharge section 1 and the pharmaceutical path 2, receiving energy transmitted from the outside and transiting from one state for permitting or forbidding the flow of the pharmaceutical to the other state for forbidding or permitting the same.

COPYRIGHT: (C)2010,JPO&INPIT