Actress Debra Messing has credited allergy medication Zyrtec for saving her career after shutting down many film and TV shoots due to swelling and breathing problems. The former Will & Grace star is a paid spokesperson for the drug and admits it’s the only thing that has helped her combat a myriad of allergies. She tells Access Hollywood Live , “Before I discovered Zyrtec I was on several different projects where we had to shut down because I had a horrible allergy attack. “The medication has also solved Messing’s snoring problem.