Reading Batch Numbers, Expiry and Registration Codes

Where to find the codes

Codes are usually embossed or printed on a carton end flap, the back panel, or the edge of the blister strip. On bottles they are on the label or base.

Reading date formats

• MM/YYYY or MM-YY: valid until the last day of that month.
• DD/MM/YYYY: valid until that exact day.
• “Use within X days of opening”: applies to eye drops, syrups and insulin once opened, regardless of printed expiry.

Every expiry format you'll see on Pakistani packs

If the printed date and the date inside the pack's 2D code differ, treat the pack as suspicious. The code decoder compares them for you.

How manufacturers build batch numbers

There is no single national format. Batch numbers are usually 4–10 letters and digits chosen by the manufacturer, often encoding the production line, year and sequence, for example 23K045 or LLM034. Because formats vary, our batch checker ignores spaces, dashes, dots and slashes when matching against DRAP alerts, so 'FW-099' and 'FW099' are treated as the same batch.

Why the manufacturing date matters too

Most tablets carry a 2–3 year shelf life. A manufacturing date that's later than the purchase date, or a gap between Mfg and Exp that's far longer than usual for that product, suggests a re-labelled or falsified pack. If anything looks odd, compare with a previous genuine pack and read how to identify fake medicine.

When codes don't match

The batch and expiry on the carton must exactly match those on the inner blister or bottle. A mismatch is one of the strongest warning signs of tampering or repackaging.

Common questions