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In Canada, the United States, the United Kingdom and Mexico, nabilone is marketed as Cesamet. It was approved in 1985 by the U.S. Food and Drug Administration (FDA) for treatment of chemotherapy-induced nausea and vomiting that has not responded to conventional antiemetics. Though it was approved by the FDA in 1985, the drug only began marketing in the United States in 2006. It is also approved for use in treatment of anorexia and weight loss in patients with AIDS.
One study compared the efficacy and tolerability of nabilone with that of dihydrocodeine in the treatment of neuropathic pain. The authors found that nabilone was not as effective as dihydrocodeine in controlling pain, and caused a higher incidence of minor adverse drug reactions than did dihydrocodeine. One critic of the study has suggested that nabilone might be best suited for the treatment of patients suffering from central and spasticity-related pain, for which there is stronger evidence for the benefits of cannabinoid therapy; however, these patients made up only a small fraction of the study's population, and the study was not designed to identify subgroups which might have responded more favorably to treatment than others.
A clinical trial performed in Canada reviewed the use of nabilone to treat nightmares in individuals suffering from post-traumatic stress syndrome. The study found that nighttime administration of nabilone reduced the frequency and/or intensity of nightmares in 34 out of 47 (72%) of patients, with 28 reporting complete cessation of nightmares. This study is limited to the extent that there was no placebo control, but warrants future investigation into the use of cannabinoid therapy in the treatment of post-traumatic stress syndrome and other disorders involving recurrent nightmares. As endocannabinoids play a significant role in regulating long-term depression, perhaps downregulating the CB1 system can help remove the highly potentiated, hippocampal/amydygalia memories of the fear. At the very least, CB1 agonists make one less likely to remember a dream, or even make REM sleep happen without significant involvement of the limbic system.
Nabilone can increase, rather than decrease, post-operative pain; in the treatment of fibromyalgia, adverse effects limits the useful dose.
^[non-primary source needed]Cunningham D, et al. (1988). "A randomized trial of oral nabilone and prochlorperazine compared to intravenous metoclopramide and dexamethasone in the treatment of nausea and vomiting induced by chemotherapy regimens containing cisplatin or cisplatin analogues". Eur J Cancer Clin Oncol (Randomized controlled trial) 24 (4): 685–9. doi:10.1016/0277-5379(88)90300-8. PMID2838294.