I Have Been Suffering From Cough From Last Three Days

I have been suffering from cough from last three days along with throat pain. Thereafter i have taken nicip for throat pain and coughsyryp for cough. After that i got relief from throat pain for one day. But it comes again in the left side of my neck with some severe pain in night which is reduced to some extent in morning. Now the pharmachist have given me Azithromycin 500 tablets which should be taken before 1/2 hour of taking food. Dear Doctor kindly suggest me whether this will work or not.