Five prisoners at HMP Glenochil were taken to hospital on Christmas Day - after drug misuse at the prison.
35 inmates were identified as being under the influence of drugs.
All prisoners are now safe.
The Scottish Prison Service says attempts to bring drugs into prisons are posing a "significant" threat.
Inmates staged a protest at HMP Glenochil last year.
They were unhappy about the amount of time they're allowed to spend outside their cells.
Two people stabbed in Stirling
Police say enquiries are ongoing after two people were stabbed in Stirling on Saturday evening.
2026 Scottish Parliament election results
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Welcome to Central FM's coverage of the 2026 Scottish Parliament election.
Stenhousemuir boss to leave club
Stenhousemuir manager Gary Naysmith is to leave the club at the end of the playoffs.
Vaping having "significant" impact in schools
New research by the University of Stirling has found vaping is having a "significant" impact on schools across Scotland.