The present invention is a dosage reminder device that serves as a regular and constant reminder of when a medication was last taken as well as when a medicine should next be taken. The device is attached to any medicine box or bottle using a self-adhesive backing element and, owing to its relative simplicity and low cost, can be disposed of once the medication has been used or is no longer needed. The self-adhesive backed dial portion includes an opposed raised annular rim with radially inwardly oriented detents. The center of the dial includes a receptacle in the center for receiving a pin for pinning in-place a multi-pointed indicator whose pointer end elements engage securely in the radially inwardly directed detents. By being mechanically engaged in 2 locations, the dial indicator resists movement, even with inadvertent patient dropping or scraping of the medication receptacle, thusly clearly and securely showing dosage timing.