Soma and Tizanidine are two different muscle relaxants that treat muscle discomfort. These FDA-approved medicines act within 30 minutes of intake. The effectiveness of the Soma pill stays for about 5 to 6 hours, and that of Tizanidine is 6 to 8 hours. Their dose strengths are different, and overdosing on the dose can cause side effects.
Read the comparison in detail here- https://healthnaturo.com/soma-vs-tizanidine/