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Managing Medicine Batch Numbers & Expiry Dates: A Chemist's Guide

Updated 4 July 2026 · 6 min read

Every expired strip on your shelf is money you already paid the distributor and can no longer sell. For most pharmacies, expiry write-offs are a bigger leak than theft or discounts — and unlike those, they're almost entirely preventable with a bit of discipline and the right tool.

Why batch tracking is different for medicine

In a grocery shop, one product is one thing. In a pharmacy, a single product — say Amoxicillin 250mg — arrives in many batches over time, and each batch has its own:

• Batch number — printed by the manufacturer, needed for recalls and returns.
• Expiry date — different for every batch on the shelf.
• MRP — which can change between batches.
• Purchase cost — which affects your margin.

If your records track only "quantity in stock" and not the batch behind it, you can't tell which units expire first, can't handle a recall cleanly, and can't return near-expiry stock to the distributor with the right details.

Sell FEFO, not FIFO

Retail runs on FIFO — first in, first out. Pharmacies should run on FEFO — first expiry, first out. The batch that expires soonest should leave the shelf first, even if it arrived later than another batch. Do this consistently and near-expiry stock clears while it's still sellable, instead of aging into a write-off.

The catch: at a busy counter, no one is reading expiry dates off strips. This is where software earns its keep — it can surface the earliest-expiring batch automatically when you add the item to a bill.

A simple expiry routine

You don't need a complex system. You need a repeatable one:

1. Record the batch and expiry at purchase. Capture it when you receive stock, not later — it's almost impossible to reconstruct afterwards.
2. Run a near-expiry report monthly. Pull everything expiring in the next 90–120 days.
3. Act on that list. Push it in sales, move it to a faster-selling branch, or return it to the distributor while returns are still accepted.
4. Write off cleanly. When something does expire, remove it from sellable stock with a dated record — you'll want the audit trail and the number for your accounts.

What good software gives you

Once batches are tracked properly, the useful things become automatic:

• The earliest-expiring batch is picked for you at billing (FEFO by default).
• A near-expiry report is one click, not an afternoon of counting.
• Recalls become a lookup — find every sale of a batch number instantly.
• Write-offs are logged with a date and reason for a clean audit trail.
• Stock value reflects real batches and real costs, not a rough average.

How DravyaOS handles it

DravyaOS tracks stock at the batch level as standard. Every receipt records batch, expiry, MRP, and cost; billing surfaces the right batch; and near-expiry and stock-value reports are built in — all offline, all free. You stop guessing, and you stop paying the distributor for stock you'll only end up binning.

Related reading: the best free pharmacy billing software in India and how to build a GST-compliant medical bill.