Phytotherapy as a Complementary Medicine for Multiple Sclerosis

Multiple sclerosis (MS) is the most common cause of neurologic disability in adults worldwide. Two main issues have caused MS patients to face several problems. One issue is that the definite cause of MS has not yet been determined and the other issue is the lack of a definite treatment for this disease. The people with MS, therefore, seek out complementary and alternative medications to manage the symptoms of this disease. Meanwhile, medicinal plants have been demonstrated to have possible positive pharmacological effects in treating MS in different models. The reliable articles indexed in the databases Web of Science, Scopus, PubMed Central, PubMed, Scientific Information Database, and Institute for Scientific Information were retrieved and analyzed to conduct this review. Medicinal plants and plant compounds caused decreases in the neurologic deficits due to MS. Clinical evidence has demonstrated the clinical potential of Cannabis sativa extract, cannabinoids, Ginkgo biloba, beta-phytosterol, and Lippia citriodora extract to improve MS symptoms. These plants and compounds can also improve spasticity, muscle spasm, neuropathic pain, and urinary tract complications in at least some of these patients. Nanocurcumins and Punica granatum L. peel extract have exhibited positive effects in animal models and can decrease neurologic deficits by reducing inflammation. Medicinal plants and their compounds can serve as new sources of MS drugs because they can improve MS symptoms.