Displaying 3 results of Demeclocycline Impurities Demeclocycline is a tetracycline antibiotic used to treat bacterial infections. However, the drug may contain impurities that can affect its quality and safety. Impurities in demeclocycline may include residual solvents, heavy metals, and other substances that can be harmful to human health. Therefore, it is important to ensure that demeclocycline is free from impurities before use.