The treatment of CVS is difficult area, with little or no research to support one form of treatment over another. Treatment often progresses in an empirical manner, by trial and error on an individual basis.
Treatment is supportive.
During an episode it is often helpful to provide a dark, quiet environment. Intravenous fluids may be needed if the sufferer has become dehydrated. Treatment with a range of anti-emetic and other drugs has been used, an individual may find a treatment that works for them, but there is nothing approaching a universal treatment regime. Between episodes a variety of treatments have been tried. Some can work well for some individuals, reducing frequency, duration or severity of an episode, but the same drug may provide no benefit to others.