Compounding refers to the sum of processes performed by a pharmacist in drug preparation including the calculations, mixing, assembling, packaging, or labeling of a drug: (i) as the result of a prescription or drug order by a physician, dentist, or veterinarian; or (ii) for the purpose of, or in relation to, research, teaching, or chemical analysis. (Sec. 5(g), R.A. No. 10918)