PRIMED – PRescribed MEdicines and recreational Drugs: Concurrent use and safety.

The use of recreational drugs has increased over time. Combined with prescribed medicines, this use may alter therapeutic effects and increase the risk of (serious) adverse reactions. Combined use may also impair cognitive and psychomotor functioning, potentially affecting driving ability. Despite such risks, healthcare professionals and patients may be insufficiently aware of and attentive to concurrent use. This project explores the magnitude of concurrent recreational drug and prescribed medicine use. We will assess prescribed medicines among recreational drug users and the characteristics of these users, and explore the extent to which people who use recreational drugs and/or driving-impairing prescribed medicines drive a car.