The FDA has published 11 recalls involving Phenobarbital since 2016. The latest was reported on 13 Apr 2022. Most were for labeling errors. C. O. Truxton has the most recalls in this group. Recalls usually affect specific lots, not every bottle on the market. Check the lot number on each recall page before acting.
Not on your own. Most recalls affect specific lots from one manufacturer, and stopping a prescription suddenly can be riskier than the defect. Check your lot number and NDC against the recall, then call the pharmacy that dispensed it for a replacement.