My father recently went through angioplasty where Stent was put in his LAD artery on 8th Feb and then  Bifurcation Stenting in Proximal LCX amd OM1 on 16th March. He has been having heavy cold and constant runny nose, watery eyes for last 3 or 4 days. Based on so many medicines he is already on for his coronary disease and treatment, what medicine can we give him for treating the cold and constant runny nose and burning watery eyes due to cold? Can I give cetrizine to stop the runny nose or any other cold medicine which would help but not interfere with other medications which he is already on.