Abstract Medical coding has been in practice in US, and UK markets, and some parts of Europe. However, its penetration to the other world countries has not been seen so far. Coding practices bring harmonization in the overall practice of the medical field. The present Letter to Editor has been written to suggest coding practices in Pharmacological research and coding practices in pre – clinical and clinical trials. Hope this will add to the overall improvement in the practices of this very imperative field of medical and pharmaceutical science. Keywords : Coding in Pre-clinical trials, Coding in Pharmacological research Pharmacological research and pre-clinical trials are one of the foundation practices in order to find a suitable drug or medicine. Pharmacological research involves animal handling, and drug dosing at different interval of time. In order to find a suitable drug effective for any particular targeted disease, lot of lead compounds ar...