Hello and welcome to Healthcare Magic. Thanks for your query.
Sinus infections can sometimes take a little longer to subside. Moreover since the sinuses
ar connected to the nose and the throat, it is possible that you could have developed a throat or a lung infection
also. Another possibility for the cough
could be what is called a "post-nasal drip", where the secretions from the sinus can drip into the throat and cause irritation and cough.
is a good antibiotic for respiratory infections, I would suggest that you wait till you complete the full course. Meanwhile, you can take a cough syrup (probably with a mucolytic
and expectorant), saline gargles and stem inhalation.
Wish you all the best.
Dr. Sheeba Stephen
Emergency Medicine Specialist