Pharmacode

Pharmacode (also known as Laetus Pharmacode) is a proprietary symbology from Laetus GmbH built for one workflow: verifying that the correct printed components — folding boxes, patient information leaflets, blister foils — are collated together in pharmaceutical packaging lines. It encodes a single integer between 3 and 131,070 as a sequence of wide and narrow bars scanned at high speed as the components feed through the line.

The design optimizes for mis-selection detection rather than data capacity: every valid number produces a pattern with large Hamming distance from its neighbors, so a wrong leaflet in a box triggers a hard reject instead of a near-miss read. Pharmacode carries no check digit because the whole code is the check. It is never used for retail POS or general identification — its world is the packaging line, where the same integer also keys the line's rejection logic.