Harry Kennedy, head of the Central Mental Hospital, said that since they stopped prescribing the medication in their prison clinics, the suicide rates there had fallen.
He said in the CMH, the most violent patients in the State are now managed without BZDs, a group name for tranquillisers commonly known as benzos.
Prof Kennedy’s statement comes as the Department of Health continues to draft laws to impose additional controls on BZDs and hypnotics known as Z-drugs.
The measures are being brought in to deal with both legal over-prescribing of the drugs by GPs and psychiatrists, and the massive illicit sale of the drugs, fuelled by a booming online trade.
Recent figures from a population survey found a lifetime prevalence (ever used) of tranquillisers and sedatives of 13.9% in 2011, compared to 10.5% in 2007. Last year usage (recent use) was 6.5%, up from 4.7%. Research among those in drug treatment in prisons found that 27% were on BZD medication, rising to a high of 44% in Mountjoy and 54% in Dochas.
Writing in the journal Psychiatry Professional, Prof Kennedy said determined efforts to end the prescription of BZDs had huge benefits.
“In our experience, eliminating the use of all BZDs in prisons and in hospital settings improves therapeutic engagement and motivation, eliminates drug seeking from the therapeutic process and reduces violence and repetitive self-harm when combined with effective nursing and multidisciplinary care,” he said.
Unlike many other psychiatric settings, said Prof Kennedy, their patients were not visibly over-sedated.
“Since we have eliminated the prescribing of BZDs in our prison clinics, the suicide rate in prisons has fallen,” he said. “In the Central Mental Hospital, the most violent patients in the State are safely managed without any BZDs at all.”
Prof Kennedy said there were no benefits from BZDs other than rapid relief of severe epilepsy disorders and alcohol detoxification.
Negative effects include cognitive and motor impairments, tolerance, and psychological dependence.
He said BZDs raised the risk of impulsive behaviour such as violence and self harm and said doctors in addiction clinics and prisons come under particular pressure to prescribe BZDs.
He said much of the medication ended up being sold on to others.
Prof Kennedy said the most common cause of death in prisons was now accidental overdoses involving opiates and diverted BZDs.
He said opiate deaths in the community were due to a cocktail of opiates and alcohol or BZDs.
He said BZDs were “licensed only for short-term use” but were commonly prescribed off-licence for long-term use in psychiatry and primary care.