17.16: Pharmaceutical Poisoning: Potential Scenarios

Pharmaceutical poisoning can occur through various channels, impacting an estimated 2 million hospitalized patients in the U.S. annually with serious adverse drug responses. These scenarios encompass both therapeutic uses, such as drug toxicity, where even standard dosages can lead to severe central nervous system depression, and non-therapeutic exposures, including accidental ingestion by children, and environmental and occupational exposures.

Unintentional poisonings often involve exploratory children and occupational hazards, while adults may experience poisoning through intentional means like recreational substance abuse or deliberate self-harm. Another form of poisoning can occur when an individual purposefully administers harmful substances to others.

The toxic effects, however, are sometimes only detectable after a drug has entered the market. FDA's Adverse Event Reporting System collects data through mandatory and voluntary reports from healthcare professionals and consumers.

To prevent such adverse events, especially those arising from medication administration errors, best practice recommendations include maintaining unit-dose distribution systems for non-emergency medications and having pharmacies prepare intravenous solutions. Inherent dangers can be mitigated by removing high-risk medications, like concentrated potassium chloride, from patient care areas and developing special procedures for managing high-risk drugs. Additionally, enhancing drug-related information resources, educating clinicians and patients, and improving access to pharmacists are crucial.

In the long term, technology-based safeguards are advocated, such as computerized order entry, dose and allergy checking, and medication tracking systems. Integrating barcodes or electronic readers for medication preparation and administration is also recommended to reduce errors and improve patient safety. These measures collectively form a comprehensive approach to reducing the risk of pharmaceutical poisoning.

Pharmaceutical poisoning can arise from therapeutic and non-therapeutic exposure to drugs or chemicals.

Therapeutic drug toxicity is a common scenario. For example, CNS depression caused by barbiturates can lead to coma in severe cases.

Such drug toxicities may only become apparent after the drug enters the market. To identify and prevent such occurrences, the FDA operates the Adverse Event Reporting System, which accepts mandatory and voluntary reports.

Unintentional poisoning scenarios include exploratory behavior in young children, as well as environmental or occupational exposures.

In contrast, intentional poisoning is more common among adults due to recreational drug abuse, deliberate self-ingestion, or intentional administration of toxic substances to others.

Additionally, errors in prescribing, dispensing, or administering medication pose significant poisoning risks.

To minimize such risks, barcodes or electronic readers should be used for medication preparation and administration. A computerized system should also be employed to manage doses, allergy checks, and medication tracking throughout patient care.