Amidst the saturation of non-specific advertising towards healthcare practitioners and the influx of standard email communications to patients, the imperative for distinctive and directed branding becomes increasingly critical. This unique need for direct engagement can be labor-intensive and costly when approached through traditional methods. The advent of Generative Artificial Intelligence (GenAI) technologies, particularly Large Language Models (LLMs), heralds a new era of efficiency and cost-effectiveness in creating tailored marketing materials. This paper investigates the application of LLMs in synthesizing personalized marketing content specifically for the healthcare sector. We highlight the capacity of LLMs to assimilate and transform existing brand narratives into individualized promotional banners and emails, achieving substantial cost savings over traditional manual production techniques. Our case study showcases Craft-Persona-Rx app which generates personalized marketing content using GenAI technologies.