The drugs, which included painkillers and antidepressants, were found at storage units in Bury and Manchester, Greater Manchester Police said.
Diazepam and tramadol were among the medicines discovered after police cut into the lock-ups. A man in his 20s from North Manchester has been arrested on suspicion of conspiring to supply controlled drugs.
He was also held on suspicion of breaches of medicines regulations and money laundering. The raids were part of a joint operation with medicines regulators to crack down on the illegal medicine trade.
Grant Powell of the the Medicines and Healthcare Products Regulatory Agency (MHRA) said the drugs were being illegally sourced and supplied online “without any prescriptions or medical interventions”.
