Terbutaline is a medication used to treat asthma and other respiratory conditions. However, it may contain impurities that can be harmful to human health. These impurities can result from the manufacturing process, storage conditions, or other factors. Therefore, it is important to ensure that terbutaline is purified and free from impurities before it is used as a medication. Regular testing and quality control measures are essential to maintain the safety and efficacy of terbutaline.