Truth Serum is an independent comic book series created, written and drawn by author Jon Adams.

Originally published as a mini comic in 2001 and given away for free, it appeared as a three-issue mini series published by Slave Labor Graphics in 2002.

In 2006, the Slave Labor Graphics mini-series, along with a long-running story from the Dark Horse Comics website and some new material was collected and self-published by City Cyclops as a 128-page oversized volume.

It's a limited edition, full-color collection of the weekly strip.

[1] Currently, it appears as a weekly web comic at Dark Horse's site,[2] as well as the official Truth Serum site.