A prescription pill vial with dosage indexer is disclosed. The prescription pill vial includes a body having a sidewall and bottom forming an enclosure for prescription medications. The sidewall extends below the bottom forming a cavity beneath the enclosure. A rosette is on the bottom of the body. The rosette has a plurality of detents thereon. An indexer is configured to fit into the cavity and rotate therewithin. The indexer has a spring-biased pawl that engages the detents on the rosette, limiting the rotation of the indexer to a number of predefined positions corresponding to the detents on the rosette.