The most common periodontal disease is chronic periodontitis, the inflammatory destructive condition of microbial etiology. Drugs like cyclosporine-A, nifedipine and phenytoin induce overgrowth of the gingiva in 60% of the patients ingesting the drug in the presence of inflammation. During inflammation cytokines derived from inflammatory cells could induce angiotensin II (Ang II) and endothelin-1 (ET-1). Ang II is the effector peptide of renin angiotensin system plays a major role in regulation of collagen synthesis and growth modulating effects on fibroblasts. Endothelin-1 is a powerful...