A pharmacy expert addresses standard of care issues related to preparing pharmaceutical product, prescription dispensing systems, and clinical patient care. A pharmacist expert also addresses administrative issues related to regulatory compliance, drug procurement, drug distribution systems, controlled substances and the DEA, managed care, and third-party reimbursement. Common clinical drug-related problems include improper drug selection, adverse drug reactions, drug interactions, medication errors, subtherapeutic dosing, overdosage/toxicity, and medication compliance.