My upper respiratory symptoms are runny nose 24 hour, mild cough, shortness of breath, nasal congestion, stuffy nose.so kindly tell me the best medicine ?

See below: You have a cold. I recommend an over the counter decongestant either phenylephrine nose drops or spray or pseudephedrine tablets (the ones locked up behind the counter). Use them for only 3-4 days to avoid rebound phenomenon. You could also take tylenol (acetaminophen) for pain relief and throat lozenges if sore throat. Take Robitussin-DM for cough. Keep yourself well hydrated and you should get better soon.