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Alzheimer disease (AD) as worldwide progressive neurodegenerative disease is prevalent disease among elderly population. Due to limitation in chemical drugs along with their adverse effects of these treatments, research for finding more effective natural drugs, is one of interesting subjects among the scientists. Melissa officinalis (M. officinalis) has a long history of use in treatment of nervous system diseases. This review article evaluates the potency of M. officinalis in treatment of AD by review of experimental and clinical documents on the efficacy, safety and its mechanisms of action in management of AD. The information is extracted from electronic resources (PubMed, Wiley, Springer and Science Direct), English and Persian scientific books. In spite of different scientific and non-scientific reports on the use of M. officinalis and its main component of rosmarinic acid in neurodegenerative diseases, there is only one clinical trial on the efficacy of M. officinalis ethanol extract in management of AD. Different mechanisms of action for M. officinalis, including inhibitory effects against amyloid beta, reactive oxygen species, and acetylcholine esterase, are involved. Larger clinical trials are recommended to confirm the efficacy and safety of M. officinalis extracts in treatment of AD patients.