A Brief Review on Promethazine

Promethazine hydrochloride is an antihistamine, antiemetic, and first-generation H1 receptor antagonist that also has potent sedative properties. Topical H1R/2R antagonists’ apparent capacity to target epidermal H1/2R was translated into improved therapeutic efficacy for inflammatory dermatoses, most likely as a result of improved barrier function and reduced inflammation.In addition to preventing motion sickness, it is used to treat post-operative nausea and vomiting, as a sedative or sleep aid, particularly for cancer patients, and to treat allergic symptoms such as itching, runny nose, sneezing, itchy or watery eyes, hives, and itchy skin rashes. The administration of promethazine intramuscularly (25mg) or orally (25 to 50mg) results in peak plasma concentrations after 2 to 3hours. Due to its strong sedative effects, PM is frequently administered at night to alleviate allergy symptoms. Promethazine has also been used to treat allergic reactions and drug hypersensitivity reactions, particularly in emergency situations. Age, gender, genetic polymorphisms, certain viral infections, and medication-related characteristics (e.g., frequency of exposure, mode of administration, and molecular weight) are all linked to an elevated chance of developing a drug allergy. PM has frequently been linked to photosensitivity reactions among its various topically applied uses. Its chemical structure and the range of chemical reactions that result in the phototoxic effects may be responsible for the increased frequency of such negative reactions.