*2.1. Materials*

Clarithromycin was provided by Century Pharmaceuticals Ltd., Vadodara, India. Stearic acid, glyceryl monostearate, Tween 20, Tween 80, Span 80, sodium lauryl sulphate, polyethylene glycol 400 (PEG 400), and propylene glycol were commercially procured from Central Drug House, New Delhi, India. Compritol 888ATO, Gelucire 43/01, Precirol ATO5, Geleol, and Transcutol P were procured from Gattefosse India, Mumbai, India. Monegyl T18 and Softemul® were purchased from Mohini Organics, Mumbai, India. Stearylamine was obtained from Hi-Media, Mumbai, India.
