# Prescription medicines (toxic or flammable) sent for scientific or medical purposes — Postal shipping restrictions by item category

For Prescription medicines (toxic or flammable) sent for scientific or medical purposes, carrier is Royal Mail / Parcelforce; restriction type is restricted; scope is UK (Post Office counter); conditions is Inner packs not to exceed 50ml/50g per tablet/capsule or small bottles up to 50ml; net quantity per parcel not to exceed 500ml/500g; liquids in a sealed polythene bag, solids in a siftproof container, recorded from its source on 2026-08-10.

- **Item category:** Prescription medicines (toxic or flammable) sent for scientific or medical purposes _(verified: appears in the quote below)_
- **Carrier:** Royal Mail / Parcelforce _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** UK (Post Office counter) _(our reading, not quoted from the source)_
- **Conditions:** Inner packs not to exceed 50ml/50g per tablet/capsule or small bottles up to 50ml; net quantity per parcel not to exceed 500ml/500g; liquids in a sealed polythene bag, solids in a siftproof container. _(verified: appears in the quote below)_

## What the source says

> Inner packaging can be blister packs of tablets or capsules of liquid (each pack not to exceed 50ml/50g per tablet/capsule), or small bottles of liquid up to 50ml. Net quantity in any parcel not to exceed 500ml/500g.

## Source

- https://corporate.postoffice.co.uk/media/w5dlus1c/foia-response_foi2025_00179_appendix-d_rm-dangerous-goods-and-prohibited-and-restricted.pdf

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).