Miljöpåverkan
Dimenhydrinat
Miljörisk:
Risk för miljöpåverkan av dimenhydrinat kan inte uteslutas då ekotoxikologiska data saknas.
Nedbrytning:
Det kan inte uteslutas att dimenhydrinat är persistent, då data saknas.
Bioackumulering:
Dimenhydrinat har låg potential att bioackumuleras.
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Detaljerad miljöinformation
Environmental Risk Classification
Predicted Environmental Concentration (PEC)
PEC is calculated according to the following formula:
PEC (μg/L) = (A*109*(100-R))/(365*P*V*D*100) = 1.37*10-6*A(100-R)
PEC = 0.0068 μg/L
Where:
A = 49,74 kg (total amount API of dimenhydrinate in Sweden year 2023, data from IQVIA). (Ref. 1)
R = removal rate = 0% (no data available)
P = number of inhabitants in Sweden =10*106
V (L/day) = volume of waste water per capita and day = 200 (ECHA default) (Ref. 2)
D = factor for dilution of waste water by surface water flow = 10 (ECHA default) (Ref. 2)
According to the European Medicines Agency guideline on environmental risk assessment of medicinal products (EMA/CHMP/SWP/4447/00), use of dimenhydrinate is unlikely to represent a risk for the environment, because the predicted environmental concentration (PEC) is below the action limit 0,01 μg/L.
Ecotoxicological studies
No ecotoxicological data available.
Degradation
No degradation data available.
Bioaccumulation
An estimated log Kow of -0.39 (unknown method) (Ref. 3) indicates that dimenhydrinate has low potential for bioaccumulation.
Log Kow < 4 which justifies use of the phrase “Dimenhydrinate has low potential for bioaccumulation”.
Excretion (metabolism)
Dimenhydrinate is excreted renally, but only 4-5% is unchanged diphenhydramine, while the rest is excreted as different metabolites. (Ref. 4)
References:
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Data from IQVIA ”Consumption assessment in kg for input to environmental classification v1 - 2024 (data 2023)”.
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ECHA, European Chemicals Agency. Guidance on information requirements and chemical safety assessment.
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Meylan WM & Howard PH (1995), ChemID+, US National Library of Medicin.
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SPC (Summary of Product Characteristics) Calma, 2025-02-10, FASS.se.