Muscle relaxer Soma 350 mg tablet is known as Carisoprodol tab 350mg. Get Soma muscle relaxer 350 mg (Soma 350 pill) online delivered now from our site. CARISOPRODOL (kar eye soe PROE dole) treats muscle pain and stiffness. It works by calming overactive nerves in your body, which helps your muscles relax. It belongs to a group of medications called muscle relaxants.