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Providing mental health nurses with information on the risks and benefits of recreational cannabis could help reduce harm caused by the substance.

This is according to a study by and in Thailand that examined literature on the medicinal benefits of cannabis, the negative mental health impacts associated with legalising recreational use and strategies to minimise these harms.

As more countries move to legalise recreational cannabis, it will likely result in some deleterious effects on mental health, particularly for vulnerable groups such as adolescents, people with an existing severe mental illness and those with a family history of mental illnesses, said corresponding author and CDU Professor in Mental Health聽.

鈥淗owever, based on the current evidence we should not expect dramatic changes in the volume of cannabis-related presentations to emergency departments and major increases in healthcare costs in the general population.

鈥淥ur review highlighted several key messages that mental health clinicians should aim to convey when working as a mental health educator, including not using it frequently, avoiding Cannabis sativa strains with high-potency THC content and not experimenting with cannabis until after 21 years old.

鈥淲e also propose several risk-reduction strategies on a population level, including regulatory and financial measures, the provision of tailored education and information health promotion programs, screening approaches, specialist treatment services and research and evaluation.鈥�

On medical benefits of cannabis, Bressington said there was strong evidence of efficacy in epilepsy, multiple sclerosis and inflammatory bowel disorders.

Bressington said the authors pursued the study after the sudden relaxation of Thailand鈥檚 cannabis use laws in 2022, following the legalisation of cannabis for medical use in 2018.

鈥淭he change in legislation has triggered a great deal of debate about the risks and potential benefits of cannabis legalisation, both within Thailand and internationally,鈥� Bressington said.

鈥淐oncerns generally relate to fears that more availability will result in increased frequency of use and a negative impact on mental health.

鈥淎s nurses and mental health clinicians we wanted to find out what impact cannabis legalisation may have on mental health in Thailand based on the evidence from other countries that have legalised recreational use.

鈥淲e need to help people make informed choices about their health behaviours and therefore collated relevant evidence that healthcare professionals may find useful if they are working with people that consume cannabis recreationally.鈥�

The study was published in the Journal of Psychiatric and Mental Health Nursing.

Image credit: iStockphoto.com/Stefan Tomic