Evrysdi helps the body’s Survival of Motor Neuron 2 (SMN2) gene to make more Survival of Motor Neuron (SMN) protein, and taking the medicine consistently helps to maintain these higher SMN levels throughout the body. This increased amount of SMN protein available to motor neurons helps more of them to stay alive, which can lead to improved muscle strength and function in people with SMA. Given the medicine stops muscle weakness and wasting from getting worse, it is important that treatment is started as early as possible.