Oral drug compliance monitoring using radio frequency identification tags

A device useful for oral drug delivery, comprising:

• (a) a tablet, pill or capsule designed to disperse in the gastrointestinal system;
• (b) an RFID tag positioned in the tablet, pill or capsule, the RFID tag comprising a switch, the switch turning on or off in response to conditions in the gastrointestinal system so that if the RFID tag is interrogated before the tablet, pill or capsule disperses in the gastrointestinal system, the response of the RFID tag signifies that the capsule has not dispersed in the gastrointestinal system and so that if the RFID tag is interrogated after the tablet, pill or capsule disperses in the gastrointestinal system, the response of the RFID tag signifies that the tablet, pill or capsule has dispersed in the gastrointestinal system.

A device useful for oral drug delivery, comprising:

• (a) a capsule, tablet or pill designed to disperse in the gastrointestinal system;
• (b) a first non-anti-collision RFID tag positioned in the capsule;
• (c) a second non-anti-collision RFID tag positioned in the capsule, so that if the RFID tags are interrogated by an RFID reader before the capsule, tablet or pill disperses in the gastrointestinal system, the response of the RFID tags collide and so that after the dispersible material of the capsule has dispersed in the gastrointestinal system thereby allowing the first and second non-anti-collision tags to separate from each other, then the response of the RFID tags is sufficiently different from each other to determine that the capsule has dispersed in the gastrointestinal system.