What do systematic reviews say?

Summary of findings for the main comparisons: Agonist pharmacological vs no intervention

Summary of findings for the main comparisons: Agonist pharmacological showed no clear difference in drug use (objective) hair and urine analyses compared with no intervention (low certainty).

• Pharmacological interventions for drug‐using offenders 2015 · Cochrane Headline outcomes only
  RR 0.72 [0.51, 1]
  2 studies · 237 participants
  Low