What is the common practice in a clinical setting.
Any reply is very much appreciated.
That depends on the drug. For example, cisplatin is a drug that reacts chemically very rapidly with proteins and other nucleophiles. When we do such studies, we process the blood sample within 5 minutes after collection. J. Shani, J. Bertram, C. Russell, R. Dahalan, D.C.P. Chen, R. Parti, J. Ahmadi, R.A. Kempf, T.K. Kawada, F.M. Muggia and W. Wolf. Cancer Research 49, 1877-1881, 1989.