Dimethyl Fumarate (DMF) has another name, like fumaric acid, which contains antioxidant and immunomodulatory influences, which is oral treatment for recurrent MS. DMF is a medication licensed for treating MS and psoriasis due to its antioxidative and anti-inflammatory properties. Nevertheless, its positive benefits have also been identified in other inflammatory disorders and malignancies. Several disease modifying treatments (DMTs), including DMF for treating MS, have been linked to progressive multifocal leukoencephalopathy (PML), Multiple Sclerosis (MS) is an advanced illness of the central nervous system that is characterized by the collapse of the myelin sheath, which is around nerve cells. This causes a variety of difficulties with motor, sensory, and/or cognitive functioning, all of which interfere with the ability to walk upright and safely, Disabling effects in MS patients develop in two ways: through RAW, which stands for (Relapse Associated Worsening), and through disability Progression Independent of Relapse Activity (PIRA),People with MS use it more often than the general population. There is little data on how frequently people with MS are readmitted to the hospital after being discharged,Researchers in the US, Canada, and Sweden found that MS includes several advantages and disadvantages to the expected estimation, and it is required to have three detection symbols at the hospital or physician-delivered, The discipline of neurology, and multiple sclerosis in particular, is experiencing a rapid rate of innovation in therapeutic approaches (Multiple Sclerosis). Until recently, there were no medications available that could alter the progression of this condition. Even after oral medicines had been established, injection and infusion drugs remained the cornerstone of MS treatment for about two decades, using dimethyl fumarate (DMF). The objective are preparation, characterization, optimization, and application of Dimethyl Fumarate. The method is starting with the first of seven stages, 1 g of DMF is mixed with 30 ml of 1-butanol before being sonicated in (Beaker A) at 75 °C in an ultrasonic instrument. In the second stage, a second culture tube (Beaker B) containing 150 ml of distilled water was heated to the same temperature under ultrasonically. At the same temperature, 10 ml of tween-80 are dissolved in 150 ml of distilled water in (Beaker B) in the third stage. The fourth stage is adding 300 mg of phospholipid 90G to (Beaker B). In the fifth stage, mix (Beaker A) with (Beaker B) to make (Beaker C). In step six, the final emulsion in (Beaker C) is diluted with cold water (between 2 and 5 degrees Celsius). After stirring the liquid for 20 minutes at 10,000 revolutions per minute, this is done in (Beaker D). Finally, solid lipid nanoparticles (SLNs) will be produced. According to the results of the research, the current formulation, thanks to its enhanced properties, maybe a promising, longer-acting formulation for the better management of MS. SLNs hold promise as a medication delivery method that can revolutionize the treatment of many diseases.