This summary information on persistence, bioaccumulation and toxicity comes from Fass. The risk comes from the report by Goodpoint.
Persistence. The potential for persistence cannot be excluded due to lack of data.
Bioaccumulation. Haloperidol has the potential to bioaccumulate in aquatic organisms.
Toxicity. Haloperidol has high acute toxicity.
Risk. See the report by Goodpoint.
Fass environmental information for Haldol (haloperidol) from Janssen (downloaded 2020-11-04).
Persistence: No data.
Bioaccumulation: Log Dow = 4.76 (pH = 3).
Toxicity: There are data for 3 trophic levels, most sensitive fish (Brachydanio rerio) LC50 96 timmar = 1.4 mg/L (OECD 203).
PEC/PNEC is based on sales data in Sweden in year 2016. PEC/PNEC = 0.00122849 which gives the risk insignificant.
In Sweden haloperidol has been reported in wild fish and treated wastewater exposed fish at levels around therapeutic concentrations in humans. This is supported by the fat solubility of the substance and measured concentrations in surface waters. Mechanism-based efficacy data is lacking.
Haloperidol is included in Region Stockholm's table of pharmaceuticals with a negative environmental impact according to the environmental programme 2017–2021. Haloperidol has been detected in treated wastewater and fish in in Region Stockholm.
Concrete proposals on how to work to reduce emissions of environmentally harmful pharmaceuticals on the list have been developed in close cooperation with the Stockholm Drug and Therapeutics Committee's expert groups. The action proposals were developed from an environmental perspective. The patient's best always goes first and several pharmaceuticals on the list are also included in the Wise list. (The Wise list is the drug formulary of essential medicines for common diseases in Region Stockholm from the Drug and Therapeutics Committee.) However, for such pharmaceuticals, there may be measures that could reduce the environmental impact.
Concrete proposal for haloperidol
Author: Health and Medical Care Administration, Region Stockholm