CONCLUSION
Based on the protocol used in this clinical case, PBM was effective in treating the symptoms of medicinal xerostomia, increasing the quality of life of the patient undergoing psychiatric treatment using the medication Fluoxetine. Although the field is still under construction, evidence from clinical experiences can build an important track record of applications. However, further studies in the form of randomized controlled clinical trials with adequate samples are needed to confirm the findings of this case report, and in vitro studies are needed to evaluate the exact mechanism involved in PBM and salivary glands.