Promethazine should not be used by children younger than 2 years since it might cause serious (possibly fatal) slow/shallow breathing. This problem has occurred even with normal doses in this age group. The lowest effective dosage should be used, and other drugs that affect breathing should be avoided. Promethazine, sold under the brand name Phenergan among others, is a first-generation antihistamine, sedative, and antiemetic used to treat allergies, nausea, and vomiting. Promethazine is used to treat allergy symptoms such as itching, runny nose, sneezing, itchy or watery eyes, hives, and itchy skin rashes. It also prevents motion sickness, and treats nausea and vomiting or pain after surgery. It is also used as a sedative or sleep aid. It works by blocking certain histamine receptors in your body, which helps to reduce itching, sneezing, and other allergy symptoms. It also affects parts of the brain that control nausea and. Need help setting up your water methanol injection system? ProMeth has over 15 years experiance customizing water methanol injection systems for customers. Promethazine is used with other medications to treat anaphylaxis (sudden, severe allergic reactions) and the symptoms of the common cold such as sneezing, cough, and runny nose. Promethazine is also used to relax and sedate patients before and after surgery, during labor, and at other times. Promethazine may hide the side effects of these medicines anticholinergic medicines. This includes some medicines used for irritable bowel syndrome or weak bladder, such as atropine or oxybutynin. These can increase the risk of dry mouth, blurred vision, constipation and difficulty in passing urine. Prometheus was bound to a rock, and an eagle—a symbol of Zeus—was sent to eat his liver. (In ancient Greece, the liver was thought to be the seat of human emotions.) His liver would then grow back overnight, only to be eaten again the next day in an ongoing cycle. VW / Audi 2.0T FSI TSI Direct Port With 5th Nozzle (Gen 1 & 2 Engines) Subscribe to receive new product updates, special offers, and the latest water methanol injection tuning tips and technical articles.