Lorazepam
Cities measured
87
Detected in
83 / 87
Highest
0.009 μg/L — Beirut
Overview
Lorazepam is a high-potency benzodiazepine used for anxiety and sedation. It is among the most frequently detected benzodiazepines in European surface water, reflecting widespread prescribing particularly to elderly populations in institutional care.
Health Relevance
At environmental concentrations, no direct pharmacological effect. Long-term benzodiazepine use is associated with cognitive decline and dementia risk in elderly patients — a prescribing issue, not an environmental one.
Regulatory Limits
Drinking Water Directive 2020/2184
No EU regulatory limit.
Controversy & Contested Science
Benzodiazepine prescribing to elderly people in EU care homes is described by European geriatric medicine societies as an epidemic — with 25–40% of elderly residents on regular benzodiazepines, often for years, contradicting clinical guidelines recommending short-term use only. The resulting wastewater load from institutional care home effluent is substantial, geographically concentrated, and largely unmonitored. Several EU deprescribing campaigns show variable success. With aging European demographics, the environmental benzodiazepine burden is projected to grow significantly over coming decades.