In West Virginia, patients or caregivers are limited to possessing a 30-day supply of medical marijuana, as defined by the West Virginia Department of Health and Human Resources. During the final seven days of each 30 days, patients may procure a 30-day supply for the subsequent period. The specific quantity considered a 30-day supply varies between patients and must be determined by the prescribing physician. This regulation aims to provide patients adequate access to medical marijuana while preventing excessive possession.