In their quest to find an effective vaccine for the COVID-19 virus researchers are looking at many existing drugs and vaccines that may help in fighting this disease. They are also considering may existing antiviral drugs as an option. Clinical trials for the same have also been conducted and results remain positive in most of the cases. But now a new research says that a combination of lopinavir and ritonavir may lead to adverse complications in older patients with COVID-19. According to French researchers older critically ill COVID-19 patients who are given a combination of these two common antiretroviral drugs