The new elemental impurities regulations stress the importance of controlling all sources of elemental impurities in drug products. The regulations also impact all upcoming and current commercial drug products for human use. To comply with these regulations, it is critical to have an efficient, cost-effective, and agency-accepted approach.

Elemental impurities can contaminate or leach into a drug product from multiple sources (i.e. drug substance, excipients, water, equipment, and container closure systems), therefore, it is no longer acceptable to monitor the inlet raw materials only. A conservative risk-based approach is recommended, which should address all potential sources of elemental impurities. If it can be demonstrated that the elemental impurities present in the drug product are under control (less than the control threshold for three lots), then analysis at release is not needed.