Active pharmaceutical ingredients (APIs) are the cornerstone of any therapeutic drug. They are the substances in pharmaceutical drugs that are biologically active and are responsible for their therapeutic effects. This article focuses on understanding APIs, their significance in the pharmaceutical industry, and an illustrative example to clarify their roles.
In the vast landscape of digital communication, few platforms have maintained such a lasting influence as QQ, a pioneering instant messaging service launched by Tencent in 1999. Originally known as OICQ, QQ rose to prominence rapidly, establishing itself as the go-to communication tool for millions, particularly in China. Its development over the years reflects significant technological advancements and shifts in user behavior, showcasing the evolution of digital interaction in the modern world.