Understanding Medical Cannabis for Persistent Pain

Medical cannabis has become an increasingly talked-about option for persistent pain, and it can be hard to know what to believe.

You may have heard positive stories through the media, friends or social media, while others are told it is not appropriate for their situation. Like all medicines, medical cannabis has potential benefits, limitations and risks. Understanding the current evidence helps you have informed conversations with your team.

What is medical cannabis?

Medical cannabis refers to medicines made from the cannabis plant, prescribed by an authorised healthcare professional for specific conditions. These are manufactured to regulated standards and differ from recreational cannabis.

Products may contain THC (tetrahydrocannabinol), the component responsible for the intoxicating or psychoactive effects associated with cannabis, or CBD (cannabidiol), which does not cause intoxication but may have other therapeutic effects. Some products are mostly CBD, some mostly THC, and some a combination. The most appropriate product, if any, depends on the person's condition, goals and overall health.

What does the evidence show?

Research into medical cannabis for persistent pain is still evolving. Some studies suggest it may bring modest improvements in pain, sleep or quality of life for some people. But findings have been inconsistent, and the benefits are often smaller than many people expect.

Current Australian guidelines conclude there is not enough high-quality evidence to recommend medical cannabis as a routine first-line treatment for persistent non-cancer pain. For this reason, the Faculty of Pain Medicine (ANZCA) does not currently recommend it as a routine treatment for most people with persistent non-cancer pain. Research continues, and recommendations may change as better evidence emerges.

Potential risks and side effects

Like all medicines, medical cannabis can cause side effects, which may include:

●        drowsiness

●        dizziness

●        impaired concentration

●        dry mouth

●        nausea

●        changes in mood

●        impaired coordination

Products containing THC may also impair judgement, reaction time and driving ability, and medical cannabis can interact with other medicines, so your team needs to know everything you take.

Driving and legal considerations

Driving laws about medical cannabis vary between Australian states and territories. In many places it is illegal to drive with detectable THC in your system, even when the medicine has been legally prescribed and you are not impaired. It is important to understand the laws where you live and discuss them with your prescribing clinician.

Is it right for everyone?

Medical cannabis is not appropriate for everyone with persistent pain. Your team will consider your type of pain, previous treatments, other conditions, current medicines, occupation, driving requirements, and the balance of potential risks and benefits. For some people it may be considered after other evidence-based treatments have been tried; for others, different approaches will suit better.

Still only one part of the picture

If medical cannabis is prescribed, it should be viewed like any other medicine: one component of a broader plan that may also include movement, education, psychological strategies, healthy sleep, pacing and active self-management. No medicine, including medical cannabis, replaces the knowledge, skills and confidence needed to live well with persistent pain.

KEY TAKEAWAY

Medical cannabis is a regulated prescription medicine containing different combinations of THC and CBD. The evidence for persistent non-cancer pain remains mixed, and the Faculty of Pain Medicine (ANZCA) does not currently recommend it as routine first-line treatment. If prescribed, it is one part of a broader plan.