Coronil, an ayurvedic drug (formulation of herbs and minerals) developed by Patanjali Ayurved that was initially promoted as a cure for the COVID-19 virus and later approved to be sold as an immunity booster to fight Coronavirus, has run into a controversy. A Chennai-based company Arudra Engineering (Arudra) filed a suit before the Madras High Court, alleging trademark infringement. Arudra sought an injunction restraining Patanjali Ayurved (Patanjali) and Divya Yog Mandir Trust, subsequently impleaded as a defendant, from using the mark "Coronil" or any deceptive variation.