From the Ministry of Justice, A Survey of Buprenorphine Misuse in Prisons looks at drug use in prisons, as measured by random mandatory drug tests. The findings support the Government’s plan to institute universal testing for the opiate substitute buprenorphine.

	Rates for Misused Drugs
	Drug		rMDT Rate		No. of Prisons
	Opiates		4.2%		101
	Cannabis		4.0%		101
	Buprenorphine		1.9%		63
	Benzodiazepines		0.9%		53
	Methadone		0.4%		25