Cannabis in palliative care: pain & quality of life

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The most important thing: cannabis reduces the need for opioids in palliative patients by a median of 44% (Mechnik 2018). Dronabinol and nabilone are approved for chemotherapy nausea. Since 2017 on BtMG prescription with SHI reimbursement option.
At a glance:
  • Dronabinol (THC) and nabilone are officially approved for chemotherapy nausea
  • Cannabis reduces the need for opioids by a median of 44% – clinically significant savings effect
  • SHI reimbursement possible since 2017 – can be applied for with a BtMG prescription in cases of severe suffering

Palliative care: what cannabis can do

Overview hide
Palliative care: what cannabis can do
Palliative fields of application with study evidence
Opioid-sparing effect: the most important palliative benefit
Dronabinol and nabilone: the approved THC preparations
Practical palliative dosing
FAQ: Cannabis in palliative care
Summary

Palliative care is about quality of life – not cure. Cannabis has a particularly well-documented role here: pain relief, antiemesis (against nausea), appetite stimulation and sleep improvement are the four central fields of application. Germany has made medicinal cannabis reimbursable for serious illnesses since 2017 – palliative patients are a core target group.

Palliative fields of application with study evidence

Symptom Cannabis effect Evidence Compound
Tumor pain CB1 modulates pain transmission spinal and supraspinal; combination with opioids opioid-sparing Level B (RCT data, Johnson 2010) Sativex (nabiximols), medicinal flowers
Chemotherapy nausea CB1 in the vomiting center (area postrema); antiemetic via 5-HT3 modulation Level A (dronabinol, nabilone approved) Dronabinol, Nabilone, Sativex
Cachexia / loss of appetite THC stimulates ghrelin, activates hypothalamic appetite center via CB1 Level B (Turcott 2018) Dronabinol (approved in the USA for AIDS wasting)
Sleep disorders CB1 in VLPO; anandamide promotes sleep initiation Level B (Portenoy 2012) THC-rich, low dose in the evening
Anxiety/dyspnea CBD anxiolytic (5-HT1A), THC respiratory sensation modulating Level C (Mechanistic) CBD oil, low-THC combination

Opioid-sparing effect: the most important palliative benefit

Cannabis combined with opioids reduces the need for opioids – this is the most pharmacologically significant palliative benefit:

Johnson et al. 2010 (J Pain Symptom Manage): RCT, n=177 tumor patients with persistent opioid pain. Nabiximols (Sativex) as an add-on significantly better than placebo for pain relief (NRS reduction 3.7 vs. 1.4 points on a 0-10 scale).

Mechnik et al. 2018 (J Pain): Retrospective study, n=274 palliative care patients. Those who used cannabis reduced opioid dose by a median of 44 %. Significant for opioid-associated side effects (constipation, sedation).

Mechanism: Cannabinoids and opioids act synergistically via different receptor systems (CB1 + μ-opioid receptors) on the same pain circuits.

Dronabinol and nabilone: the approved THC preparations

Dronabinol (Marinol, Syndros): Synthetic delta-9-THC; available as a narcotic prescription in Germany; standard indications: Chemotherapy nausea, HIV wasting. 2.5-20 mg/day.

Study highlight: Johnson 2010 (RCT, n=177): Sativex as an add-on to opioids for tumor pain – pain reduction 3.7 points on NRS scale vs. 1.4 points placebo. Statistical significance despite existing opioid therapy.

Nabilone (Cesamet): Synthetic THC analog; stronger antiemetic than dronabinol; chemotherapy nausea when other antiemetics fail.

Nabiximols (Sativex): THC:CBD 1:1 oral spray; approved for multiple sclerosis spasticity in Germany; in many countries also for tumor pain (off-label possible in Germany).

Practical palliative dosing

Pain (day): THC 5-10 mg every 6-8 hours orally; or Sativex 2-4 sprays
Nausea: dronabinol 5 mg 1-3h before chemotherapy + 2-4 hours afterwards
Appetite: THC 2.5 mg 30 min before meals
Sleep (night): THC 5-10 mg + CBD 50-100 mg in the evening

More on the topic:

FAQ: Cannabis in palliative care

Summary

Cannabis is particularly well documented in palliative care: Level A for chemotherapy nausea (dronabinol approved), Level B for tumor pain (Sativex RCT data), Level B for loss of appetite and sleep. Opioid saving effect of up to 44 % is the most clinically significant benefit. In Germany since 2017 on narcotic prescription with possible SHI reimbursement. Cannabis in cancer for antitumor studies; medical cannabis on prescription for the access route.

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