Medicines worth about £250,000 were handed in during a campaign encouraging the safe disposal of unused and out-of-date drugs in Jersey.
Among the drugs was a painkiller withdrawn from use about eight years ago, due to its toxicity.
Deputy Susie Pinel, Minister for Social Security, said she was delighted by the campaign's success.
She said: "We can do more to reduce waste by changing the way we think about repeat prescriptions."
Prescriptions in Jersey
- In 2013, more than 1.8 million prescriptions were dispensed in Jersey, at a total cost to the health insurance fund of £18.1m
- An average of 18 prescriptions are issued per person each year, just below the UK average of 19 prescriptions per person
- Repeat prescriptions account for about 70% of all prescriptions in Jersey
- In Jersey prescribers are encouraged to prescribe generic medicines - rather than branded, to help control cost
- In 2013 more than 90% of all items prescribed in Jersey were generic
Some of the other returned medicines included unopened packs of nerve pain, worth about £200 and hundreds of painkillers and laxatives.
The second part of the campaign will target islanders when they are seeking to obtain their medicines, to make sure drugs are really necessary and prevent waste.
This includes posters in pharmacies and GP surgeries, flyers given to patients and social media advice.