Hi. Thanks for your query. Since you are a diagnosed case of vestibular neuronitis, the weakness of the legs and calves cramping may not be associated with it. It may have a different reason or be a part of the disease complex in the brain giving both the problems together. You may please discuss this with your Neurologist to get a confirmed answer otherwise you have to consult an Orthopedic or General Surgeon to examine the lower extremities for probable reason of calf cramping like Varicose veins and DVT or vascular insufficiency. A proper diagnosis will help to plan for a proper treatment. I Hope this answer helps.