COVID-19 has been officially characterised as a pandemic by the World Health Organisation (WHO), therefore a need arises to discover drugs effective in combatting against this virus. In this experiment we try to find possible drug candidates from the existing pool of FDA approved drugs and check their theoretical effectiveness against 6LU7 and 6Y84, two protein macromolecules for 2019-nCoV. 6LU7 is the crystal structure of COVID-19 main protease in complex with an inhibitor N3 and 6Y84 is the COVID-19 main protease with unliganded active site.