Phenergan contains the active ingredient promethazine hydrochloride which is a versatile drug used to help with more than one condition. It is an effective antihistamine that is used to ease the symptoms of an allergy or hay fever. Phenergan can also be used to ease motion sickness, helping to prevent nausea so you can enjoy your trip without feeling sick and uncomfortable. Phenergan is also useful as a short-term remedy for insomnia, or difficulty sleeping, helping you to drift off into a good night's sleep.
Ingredients: Promethazine Hydrochloride 25mg
What is an antihitamine?
When you are in contact with something you’re allergic to, such as pollen, your body begins to produce histamine. Histamine is an immune response to allergic substances and causes symptoms like watery eyes and sneezing with the intention to remove the allergen from your body. Antihistamines block histamine receptors, helping to prevent those symptoms from occurring right from the start.