Iatrogenic effects are negative outcomes for patients which have been caused by an intervention. Such effects of drug prevention interventions could be, for example, increased drug use, harms for participants, etc. Iatrogenesis can concern main outcomes, such as drug use, or increased incidence of other unwanted behaviours (“side effects”). An iatrogenic effect is different from no effect (“ineffective”) as this would mean that there were neither positive nor negative outcomes.
