Overdose dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — myjellybean

If you dreamed of you or someone else overdosing on drugs, it is a serious warning that your behavior has become self-destructive. You need to take a more positive approach to dealing with your problems and set your eyes on your future, or you will end up sabotaging yourself and not getting what you want.
Source: My Dream Interpretation Author: myjellybean

Interpretation 2 — Versatile - Anonymous

See alcohol / alcoholic, drugs and drunk
Source: Dream Meanings of Versatile Author: Versatile - Anonymous

Interpretation 3 — Joan Seaman - Tom Philbin

One is getting too much of something.
Source: New American Dream Dictionary Author: Joan Seaman - Tom Philbin