Polypharmacy meets polyherbacy: pharmaceutical, over-the-counter, and natural health product use among Canadian adults.

Objectives: Natural health products (NHP) are increasingly being used to supplement prescription medications (PM) and over-the-counter (OTC) products. The objective of this study was to examine patterns of overall health product use and how these patterns are associated with social and health factors.

Methods: We used direct health measures data from the Canada Health Measures Survey (CHMS) Cycle 1.