It took a council team three hours to clear the items
More than 1,000 needles and phials have been found dumped in a hedge in Derbyshire.
They were discovered on Codnor Denby Lane, near Codnor, and were originally used for injecting animals including cattle, cats and pigeons.
A team from Amber Valley council spent three hours clearing the debris at a cost of several thousand pounds.
Staff said they were committed to clearing up such fly-tipping and to tracing those responsible.
Dave Shaw, from the council, said the clean-up team had been "shocked and stunned" by what it had seen.
"It is the worst I have ever come across. I have never heard of anyone coming across this amount of needles," he said.
"These were all used needles, some of them did not have the end caps on so the needles themselves were exposed.
"You have got glass phials that had broken open and were discarded under the hedge bottom.
"Then you have all the leaf litter under the hedge so you can't even see the needles, which puts our operatives at risk."