Bottles of cough medicine were stolen following a late-night break-in at the Tesco supermarket in Kesgrave.
The incident happened at the Ropes Drive store shortly before 1am on Wednesday, Suffolk police said.
The suspect used a crowbar to gain entry to the building via a fire exit and it is believed that six bottles of cough medicine were taken in the raid.
The suspect left the scene on a bicycle.
Anyone with information related to the incident is urged to contact Suffolk police, quoting crime reference number 37/11721/21.
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