Objective: The present study aimed at the development of a suitable formulation for the treatment of acne using microemulsion-based topical spray system. In this study, we have designed and evaluated novel isotretinoin microemulsion-based spray and gel using basil oil. The rationale of work is to develop single topical formulation with multiple effects by combining effect of retinoid (prevention of comedones formation) and natural oil like basil oil (antibacterial, anti-inflammatory, and penetration enhancer).Methods: The optimized microemulsion-based spray comprised basil oil, Kolliphor RH40, Ethanol, and water was prepared by an aqueous titration method with the help of a ternary phase diagram. The microemulsion-based gel was prepared using Carbopol ETD 2020. The formulations were evaluated for their physicochemical properties. The formulations were subjected to antibacterial activity against Propionibacterium acnes, Staphylococcus epidermidis, and Staphylococcus aureus using cup plate method against hydrogen peroxide as standard. Finally, the drug released from spray and gel formulations was studied and compared to a commercially available product.Results: Isotretinoin microemulsion-spray showed highest flux (27.67±0.12 μg/cm2/h) in comparison to formulated microemulsion gel (21.81±0.103 μg/cm2/h) and conventional marketed gel (19.29±0.34 μg/cm2/h). The particle size of optimized microemulsion was found to be 68.43 nm. The results indicate that the formulated microemulsion-based spray presents a promising alternative for acne therapy.Conclusion: This mentioned delivery system presented several benefits such as photostability, better patient compliance, antibacterial activity, and good penetration into the desired skin layer when compared to in vitro diffusion of conventional gel and microemulsion-based gel.

: Overexploitation of antibiotics has led to significant challenges with antimicrobial resistance. The gravity of this trend has resulted in the rapid emergence of multi-resistant pathogens. Increased frequency to treat infections and the unfeasibility to reverse this resistance have burdened researchers in developing novel mechanisms to counteract and obstruct antimicrobial resistance. An effective medical strategy to control resistance was to develop new and potent antibiotics although, a sobering reality is that the product pipeline towards new antibiotics is inadequate. To ensure continued effective treatment of bacterial infections, there is an urgent need to control as well as conserve existing antibiotics through novel approaches. Utilization of Essential Oils (EO) in a multi-target anti-infective therapy addresses this need by targeting the mechanism of bacterial resistance and discovering synergism between EO’s antimicrobial properties to anti-infectives. When introduced into a pharmaceutical formulation, this novel and rational approach will open the door towards the development of a new generation of antimicrobials. Today, several essential oils have the ability to act as resistant modifying agents and enhance the antimicrobial activity of anti-infectives. This review article intends to focus on the effectiveness of essential oils on drug-resistant pathogens, mechanisms to counteract antimicrobial resistance, approaches to enhance efficacy, and explore potential applications.