APIs, or Active Pharmaceutical Ingredients, are the essential substances in drugs that produce the intended therapeutic effects. They are the core components in medications, responsible for treating diseases and improving health conditions. APIs are manufactured through chemical synthesis, biotechnology, or extraction from natural sources. They must meet stringent quality and regulatory standards to ensure safety and efficacy. Pharmaceutical companies either produce APIs in-house or source them from specialized manufacturers. The quality of APIs directly impacts the effectiveness and safety of the final pharmaceutical products. Used in various forms, from tablets to injections, APIs are critical to the development and production of medicines across the healthcare industry.