Pharmaceutical Environmental Risk Assessment

Create an Environmental Risk Assessment for:

Product: [Drug name]
Dosage Form: [Formulation]
Regulatory Authority: [FDA, EMA]
Expected Annual Production: [Quantity]

Product Information:
- Chemical properties: [Structure, molecular weight]
- Physical-chemical data: [Solubility, log P, etc.]
- Excretion profile: [How eliminated]
- Expected patient population: [Size]

Develop ERA including:

Phase I Assessment:
1. Estimation of environmental exposure (PEC calculation)
2. Action limit evaluation
3. Phase II triggering assessment

Phase II Assessment (if triggered):
- Tier A:
  1. Physical-chemical characterization
  2. Environmental fate studies
     - Biodegradation
     - Adsorption/desorption
  3. Ecotoxicity studies
     - Algae
     - Daphnia
     - Fish
  4. PEC/PNEC ratio calculation

- Tier B (if needed):
  1. Extended fate studies
  2. Chronic toxicity studies
  3. Sediment organism studies

5. Risk characterization
6. Risk mitigation measures
7. Conclusions