Substances that make you sleepy, such as alcohol, tranquilizers. The text only version may be available in large print, Braille or audio CD. Avoid prolonged exposure to the sun. Phenergan 10 mg Tablets. It may also be used for sedating people who are agitated or anxious. Medication containing promethazine, such as Phenergan Elixir, which is an antihistamine for children over two, is being used by some parents to make their babies drowsy phenergan sleepy at bedtime I was just diagnosed with hyperemesis gravidarum & prescribed phenergan suppositories. It has been popular in the past as a means of 'settling' children, but promethazine should not be used in this way Related Drug Monograph: Phenergan oral See All User Reviews on WebMD and Submit Your Own Review Comment from: John443865-71on Treatment for less than 1 month Published: November 27. It is available by mouth as a syrup, as a rectal suppository, or by injection into a muscle Common side effects include confusion and sleepiness PHENERGAN™ (promethazine hydrochloride) Suppositories, USPDESCRIPTION. If you're taking it for a cough or cold symptoms, allergies or nausea, your symptoms should start to improve within 20 minutes why does phenergan make you sleepy Best Answer: Phenergan does make you very tired. It is used to treat allergies, trouble sleeping, and nausea. For further information call emc accessibility on 0800 198 5000 Everyone's a little different and it may depend on the patient. Promethazine is known to make you feel sleepy so it's not a good idea to. Only very large doses will make you sleepy Different people have different reactions to these chemicals. Trade/other name(s): Anergan, Phenergan. They work extremely well. Uses For Phenergan It is often given in conjunction with antibiotics to combat side effects such as itching, dizziness and blurred vision. Promethazine also makes you feel sleepy (has a sedative effect). Dilated blood vessels can cause nasal congestion (stuffy nose). It does work well if you are sick with nausea and the drowsiness side effect would definitely help you sleep Medscape - Motion sickness, nausea, vomiting-specific dosing for Phenergan, Phenadoz (promethazine), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information I used phenergan for my insomnia every now and again when I need a long sleep and it always works wonders. Histamine is a chemical used to identify and remove substances that trigger an allergic response.. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose Phenergan for Severe Morning Sickness - posted in Pregnancy: Tips, Questions and Information: Anyone tried it? It is often used in nausea. Doesn't mean it's a great idea to do. I need some encouragement and help! I don't approve nor disapprove but misinformation is much more dangerous than the truth. It will also lower your blood pressure so be careful when you stand up. It may be taken (for a few days only) to help promote sleep in adults with sleeping problems. Promethazine (the active ingredient in Phenergan) will start to make you feel sleepy around 20 minutes after you take it and may work for up to 12 hours.