The OnStar button for Doctors & Pharmacists using medical Apps Think: The OnStar button for Doctors & Pharmacists using medical Apps. Needl is a Q&A service that enables healthcare professionals to ask questions about the drugs they prescribe?within the web and mobile Apps they use to search for drug information every day. Needl sells these questions directly to Pharma companies eager to engage HCPs. Through the Needl Dashboard-API we provide up-to?date business intelligence about the questions HCPs are asking, and the trends influencing their behavior.