Dhrubo Jyoti Sen and Jalpa G Patel
Prodrug is a substance which after administration is metabolized into a pharmacologically active drug. Actually prodrug has least medicinal value in in-vitro/in-vivo but after biotransformation by metabolism in invivo it releases the active medicament. A drug is a substance which is a chemical entity, has definite structural skeleton, obtained by natural or synthetic or semisynthetic source, which can fit on bioreceptor platform having controlling capacity to control over the biochemical malfunction. Every drug is xenobiotic because it is coming from outer source (xeno) and active in biological unit (biotic). Prodrug is the precursor of drug which is made by derivatization of the same to enhance the bioavailability by pharmacokinetics, lipid solubility by partition coefficient and increase the physicochemical and biochemical parameters by pharmacodynamics. Ibuprofen, Diclofenac and Paracetamol have been taken as NSAID (Non-Steroidal Anti Inflammatory Drug) and three prodrugs have been synthesized by reacting with acid chloride of ibuprofen and diclofenac with paracetamol to get prodrug of ester linkage and acid chloride of ibuprofen has been reacted with diclofenac to get prodrug of amide linkage. All three prodrugs showed different logP values and molecular weights according to the solubility parameters and electronegativity: logP profile: Prodrug-C>Prodrug-B>prodrug-A; molecular weight profile: Prodrug-C>Prodrug-B>prodrug-A.
