An activity monitor which can be pre-programmed at the factory, the doctor's office or the pharmacist, or that can be programmed by the user. The activity monitor is affixed to a medicine bottle or container and activity associated with the bottle or container, such as movement, opening, volume changes, etc. are monitored in view to the schedule. If the schedule indicates that a dose of medicine should be taken at a particular time, but the monitored activity does not determine that the medicine has been taken, an alert signal will be issued to alert the user that it is time to take the medicine. In addition, if the monitored activity indicates that the medicine bottle has been opened prior to a scheduled time, then a tamper alert can be triggered.