What do systematic reviews say?

Dihydrocodeine vs methadone

Dihydrocodeine showed no clear difference in treatment retention compared with methadone (low certainty).

• Dihydrocodeine for detoxification and maintenance treatment in individuals with opiate use disorders 2020 · Cochrane Headline outcomes only
  RR 1.04 [0.94, 1.16]
  1 study · 204 participants
  Low