... Verapamil (branded as Verelan, Calan, Covera) is a commonly used preventive drug therapy, especially for people who do not experience remission. In some cases where people do not respond or have severe side effects to first-line therapy, more acute treatments may be used. ...
What To Know About Cluster Headaches
... Verapamil (branded as Verelan, Calan, Covera) is a commonly used preventive drug therapy, especially for people who do not experience remission. In some cases where people do not respond or have severe side effects to first-line therapy, more acute treatments may be used. ...