42 Patients taking the oral solution of Agenerase, particularly those with renal impairment or those with decreased ability to metabolise propylene glycol (e. g. those of Asian origin), should be monitored for adverse reactions potentially related to the high propylene glycol content (550 mg/ ml), such as seizures, stupor, tachycardia, hyperosmolarity, lactic acidosis, renal toxicity, haemolysis.