Over 218 Million people actively use Twitter, sharing their thoughts and information with the world 140 characters at a time. Here at InCrowd, we’re big fans of the micro blogging social network, we tweet @InCrowdNow and over @CROWDTalk participating in conversations around the topics of pharma, real time data, market research, health care social media, and patient engagement. Today, we thought that we would share some of the top pharma industry experts on Twitter. They represent many parts of the pharmaceutical industry, from journalists and marketers to thought leaders, bloggers, innovators and beyond. We hope you enjoy this list and join in the conversation on Twitter!