We had a intersting case in one of our volunteers taking part in a clinical trial. His CPK on 23.07 (early morning)was 5837 IU/L (AST 185 IU/L; ALT 185 IU/L). He claims not to have done much exercise although he is fit (he's married though!!). No alcohol or other drugs (including social ones). His CPK on 25th (evening)was 2053 IU/L (AST 130; ALT 69)and on the 27th (morning)was 416 IU/L(AST 57; ALT 47). Certainly a rapid halflife - any ideas? Graham Mould Guildford Clinical Pharmacology Royal Surrey County Hospital ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/