Cannabis Oil Has Long-Term Benefits for Chronic Health Conditions

By Pat Anson

Patients suffering from chronic pain and other chronic health conditions showed significant improvement in their quality of life, fatigue and sleep after taking cannabis oil over a one-year period, according to a new Australian study published in the journal PLOS One. Anxiety, depression and pain also improved during the course of the study, one of the first to demonstrate the long-term benefits of medical cannabis.

Researchers at the University of Sydney followed over 2,350 patients from across Australia who ingested cannabis oils containing both THC and CBD. Nearly two-thirds of the participants suffered from chronic musculoskeletal or neuropathic pain. Others lived with insomnia, depression, fatigue and anxiety. Participants did not get adequate relief from conventional treatments.   

Researchers found that the initial improvements in health over three months were maintained over 12 months. Because there was no control or placebo group, the improvements can’t be directly attributed to cannabis oil. But researchers noted that most of the participants stopped or reduced their use of opioid pain medication by the end of the study.

“This is promising news for patients who are not responding to conventional medicines for these conditions," said lead author Margaret-Ann Tait, a Research Manager and PhD Student at Sydney Nursing School, University of Sydney. 

The ratio of THC and CBD in the cannabis oil varied. Patients with conditions like fatigue or insomnia did better with oils that contained more THC; while those with chronic pain did better with higher ratios of CBD.

“We observed differences in the degree of improvement in fatigue, insomnia, anxiety, and depression depending on the ratio of CBD and THC in average daily MC (medical cannabis) doses. For these outcomes, average daily doses of THC-dominant MC was associated with greater odds of improvement than CBD:THC-balanced MC,” researchers said.

“Our findings suggest that people with chronic pain conditions experience better outcomes over time on lower doses of CBD when combined with smaller amounts of THC at a ratio of 10:1.”

Because this was an observational study, with different ratios of THC and CBD, researchers said they could not draw definitive conclusions about which ratios work best for each condition. The oils are made by Little Green Pharma , which funded the Quality of Life Evaluation Study (QUEST).

A 2023 survey of Australian patients with chronic illness found significant improvements in their physical and mental health after they started using medical cannabis. Most of the cannabis products in that study were oils containing CBD and/or THC.   

Chronic Pain Patients Report Improvement from Cannabis Oil

By Pat Anson, PNN Editor

Patients with chronic pain and other illnesses who did not respond to conventional treatment reported improvements in pain, anxiety, depression, fatigue and quality of life after being prescribed cannabis oil for three months, according to a large new Australian study. There were no improvements in patients with insomnia.

Researchers at the University of Sydney surveyed 2,327 patients with chronic health issues who were prescribed cannabis oil products containing cannabinoids, delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). The oils are made by Little Green Pharma , a company that specializes in cannabis-based medicine and provided funding for the Quality of Life Evaluation Study (QUEST Initiative).

Over two-thirds of the participants (69%) suffered from chronic pain. Half were being treated for more than one health condition; and one in four were unemployed, on leave, or had limited work duties due to illness.   

Medical cannabis was legalized in Australia in 2016. Cannabis is only available by prescription in Australia to patients with health conditions that are unresponsive to conventional treatment.

“Short-term findings over 3-months indicate that patients prescribed MC (medical cannabis) in practice have improved HRQL (health-related quality of life) and reduced fatigue. Patients experiencing anxiety, depression, or chronic pain also improved in those outcomes over 3-months, but no changes in sleep disturbance were observed in patients with sleep disorders,” researchers reported in PLOS ONE.  

“The study continues to follow patients over 12-months to determine whether improvements in PROs (patient reported outcomes) are maintained long-term. In addition, further subgroup analyses will be undertaken to determine whether patients with specific health conditions have better outcomes compared with others when using validated condition-specific questionnaires.”

The researchers did not measure adverse effects in the QUEST Initiative, but 30 participants withdrew from the study due to “unwanted side effects.” The authors noted that more research on cannabis oil products used in the study is needed in order to successfully treat patients with insomnia and sleep disorders.

Another recent survey in Australia of patients with chronic illness found significant improvements in their physical and mental health after they started using medical cannabis. Most of the cannabis products in that study were oils containing CBD and/or THC.