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Analgesic and Sedative Effects of Melatonin in Temporomandibular Disorders A Double-Blind, Randomized, Parallel-Group, Placebo-Controlled Study

Analgesic and Sedative Effects of Melatonin in Temporomandibular Disorders A Double-Blind, Randomized, Parallel-Group, Placebo-Controlled Study

The association between myofascial temporomandibular disorder (TMD) and nonrestorative sleep supports the investigation of therapies that can modulate the sleep/wake cycle. In this context, melatonin becomes an attractive treatment option for myofascial TMD pain. To investigate the effects of melatonin on pain (primary aim) and sleep (secondary aim) as compared with placebo in a double-blind, randomized, parallel-group trial. Thirty-two females, aged 20 40 years, with myofascial TMD pain were randomized into placebo or melatonin (5mg) treatment groups for a period of four weeks. There was a significant interaction (time vs. group) for the main outcomes of pain scores as indexed by the visual analogue scale and pressure pain threshold (analysis of variance; P <0.05 for these analyses). Post hoc analysis showed that the treatment reduced pain scores by ?44% (95% CI ?57%, ?26%) compared with placebo, and it also increased the pressure pain threshold by 39% (95% CI 14%, 54%). The use of analgesic doses significantly decreased with time (P <0.01). The daily analgesic doses decreased by ?66% (95% CI ?94%, ?41%) when comparing the two groups. Additionally, melatonin improved sleep quality, but its effect on pain was independent of the effect on sleep quality. This study provides additional evidence supporting the analgesic effects of melatonin on pain scores and analgesic consumption in patients with mild-to-moderate chronic myofascial TMD pain. Furthermore, melatonin improves sleep quality but its effect on pain appears to be independent of changes in sleep quality.

Accession: 036650808

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