Muscle spasms and rigorousness have become common problems, which may arise due to the sclerosis and injury caused to spinal cords. Eperisone Hydrochloride is a safe medication for dealing with these problems. Many a time patient with spinal surgeries feel stiffness on their back for months. The chemical works by relaxing the muscles. This helps in the stimulation of the blood flow in the specific body region. The drowsiness and headache can be side effects of the medicines if not taken in right dosage.