Covid-19 suspecting. He needs to use!

One of my friend travel from Latin America through Spain as a transit reaches india 10 march up-to 30 march no type of symptoms from 30th March onwards he feel difficulty in breathing but not frequently and temperature is 36.6c always up-to now but he feel chills with tremors, nasal secretions not frequently and sometimes sneezing so as per CDC chills and tremors are new symptoms so when he use to take paracetamol for 3 days consequitively he feel OK after two weeks again he feel like the same all blood results and c creatine reports chest x ray are normal and stomach eco is normal just mild fatty liver so in this if he had mild symptoms of covid-19 what might be the medicines need to use and hot long he needs to use