The content in Plumb’s Veterinary Drugs is updated on a rotating, continual schedule. Each monograph is reviewed and, if necessary, continually updated annually, biennially, or triennially; the update frequency is based on the availability of new information. The cyclical nature of the review process results in a complete review of all content every 4 years, similar to previous print updates with the exception of the updates being published digitally as they become available rather than waiting for the next print edition to be published.