Yorke Mid North police seized drugs and prescription medication from a premises at Jamestown on Saturday.
Police attended and searched the property at Jamestown with the assistance of a drug detection dog as part of an ongoing investigation into drugs in the Mid North area.
Approximately 290 grams of cannabis, a quantity of MDMA and prescription medication was located at the address.
Police enquiries are continuing.
Anyone with information on the sale, distribution or manufacture of illicit drugs is urged to call Crime Stoppers on 1800 333 000.
People can also report information online at the Crime Stoppers South Australia website: http://crimestopperssa.com.au. You can remain anonymous.