Two boxes of potentially harmful medicine were reported lost on Friday.
Police in Lerwick are advising people to be aware of medication that the 2mg Diazepam (Valium) tablets were prescribed by a medical expert and could pose a risk to health if taken.
If anyone finds the medication they are asked it to hand it in to the nearest pharmacy or police station.
If anyone has any further information about the matter they should contact the police on 101.