Citrazen and similar drugs have suppressive effect. Need detailed picture of yours and your complaints besides your likings/dislikings, temprament, etc., your family history and past history. However it is advised to do gargles with saline warm water and inhale steam once or twice a day regularly.
Next Steps
If desire so you may consult through this App for homoeipathic treatment.
Health Tips
You may take one or two lemons and one green amla daily in whatever manner you like.