Officers from West Bromwich Police swooped on the hospital – the identity of which has not been revealed – on Saturday to seize the item.
The packet of Walkers' Wotsits contained suspected Class A drugs which were taken and destroyed by West Midlands Police.
A spokesman for the force said: "Officers from West Bromwich Police attended a hospital today where an eagle-eyed NHS nurse had intercepted a packet of crisps with a hidden surprise inside.
"Suspected Class A seized and destroyed."
Officers from @WestBromwichWMP attended a hospital today where an eagle-eyed @NHSuk nurse had intercepted a packet of crisps with a hidden surprise inside! Suspected class A seized and destroyed 👍 #goodwork #nhsheroes #drugs #talktofrank pic.twitter.com/wzhd7O2NRX— West Bromwich Police (@WestBromwichWMP) April 10, 2021