About betamethasonepotent glucocorticoid, anti-inflammatory, immunosuppressent.mechanism of action of betamethasonethe drug exerts it`s pharmacological action by penetrating and binding to cytoplasmic receptor protein and causes a structural change in steroid receptor complex. this structural change allows it`s migration in to the nucleus and then binding to specific sites on the dna which leads to transcription of specific m-rna and which ultimately regulates protein synthesis. it exerts highly selective glucocorticoid action. it stimulates the enzymes needed to decrease the inflammatory response.