Drug Shortage Substitution Agent

When a drug goes short, the pharmacy must find stock, pick alternatives and tell prescribers, often within days. This agent watches supplier availability and shortage lists, compares them with stock and usage, and predicts when each item will run out. It finds alternatives on the formulary, checks equivalent dosing, and lists any patient groups for whom an alternative is unsafe, such as those with kidney problems. It drafts a substitution plan and a notice to prescribers. After approval, it watches stock and usage to see if the plan holds. If supply of the alternative falls short too, it moves to the next option and drafts an update. The pharmacist approves the substitution plan and every prescriber notice. Edge case: when the first alternative is also short, the next option is prepared.