There it is again: You hives are breaking out, and it is a complete torture that you are desperate for a fast solution. You may be wondering, among the prescription drugs and over the counter medicine — Phenylephrine hydrochloride is a decongestant which is a kind of antihistamine type drug (common cold or symptom drug). You are about to leave a GSK website. By clicking this link below, you will be taken to an external website that is independently operated and not managed by GSK. It is used to treat nose stuffiness. It is used to ease allergy signs. What do I need to tell my doctor BEFORE I take Dimetapp? If you have an allergy to brompheniramine, pseudoephedrine, or any other part of Dimetapp (brompheniramine and pseudoephedrine elixir, liquid, and syrup). Find a great collection of Allergy & Sinus at Costco. Enjoy low warehouse prices on name-brand Allergy & Sinus products. Today we're going to ditch the commercial cough syrup and trade it for a natural remedy that works even better. This recipe is made with all-natural, food-based ingredients that provide instant cough relief - and it Before taking this medicine. Do not use Promethazine with DM if you have asthma or other lung disease. Do not use a cough or cold medicine if you have used an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate) within the past 14 days. Cetirizin is used for preventing or treating symptoms of hay fever and other upper respiratory allergies such as stuffy nose, runny nose, sneezing, itching of the nose and throat, and itchy/ watery eyes. Zyrtec is the brand name of cetirizine, an over-the-counter (OTC) antihistamine used to treat cold and allergy symptoms such as sneezing, itching, watery eyes, or runny nose. Cetirizine is an allergy medication that you can buy over-the-counter at a pharmacy. That is, you don’t need a prescription. The medication comes in capsules, tablets, and a syrup.