ERYTHROMYCIN IS A DRUG THAT HAS LOW SOLUBILITY IN WATER. THE LOW SOLUBILITY OF THE DRUG CAUSES SLOW ABSORPTION OF THE DRUG IN THE BODY AND RESULTS IN INADEQUATE BIOAVAILABILITY, SO A SOLID LIPID NANOPARTICLE OF ERYTHROMYCIN WAS CARRIED OUT TO INCREASE ITS SOLUBILITY. FORMULA SOLID LIPID NANOPARTICLE CONSISTED OF STEARIC ACID WITH VARIOUS CONCENTRATIONS AS A LIPID MATRIX, TWEEN 80 AS A SURFACTAN…