Baclofen 10 mg (BAK loe fen) cures muscle cramps. It works by letting your muscles loosen up, which makes your muscles less stiff. It is a muscle relaxant, which is a type of medicine. Baclofen is a muscle-relaxant drug. Lioresal Tablets are used to treat muscle cramps caused by illnesses like cerebral palsy, multiple sclerosis, cerebrovascular accidents, spinal cord diseases, and other conditions that affect the nervous system. Take this drug orally. Follow instructions. Take it till your doctor says to. Stopping abruptly can cause negative effects. Your condition could worsen. Ask your doctor about administering this drug to children.