Phenergan is a medication that contains the active ingredient promethazine. It is commonly used to relieve symptoms of various conditions such as allergies, motion sickness, nausea, and vomiting. Promethazine works by blocking histamine, which is a natural substance in your body that causes allergic symptoms. This medication is suitable for adults and children over 2 years old who need relief from these symptoms.

About Phenergan
Dosage and usage
For adults, the usual dose of Phenergan is 25 mg taken before bedtime. For children, the dose may vary based on their age and weight. It is important to follow your healthcare provider's instructions carefully. Do not exceed the recommended dose, and do not take it more often than prescribed. If you miss a dose, take it as soon as you remember. Remember that taking too much Phenergan can be harmful. If you experience any unusual symptoms or side effects, contact your doctor immediately.
What Phenergan contains
Each Phenergan tablet contains 25 mg of promethazine hydrochloride as the active ingredient. Other ingredients include lactose, maize starch, povidone, magnesium stearate, polyethylene glycol, hypromellose, and titanium dioxide.
Side effects
Common side effects of Phenergan may include drowsiness, dizziness, blurred vision, dry mouth, and constipation. Serious side effects that require immediate medical attention include muscle stiffness, uncontrollable movements, fainting, and irregular heartbeat. If you experience any of these severe side effects, seek medical help right away.
Precautions
Do not use Phenergan if you are allergic to promethazine or any other ingredients in the product. It is important to inform your doctor about any medical conditions you have, especially if you have asthma, epilepsy, liver disease, or respiratory problems. Phenergan may interact with certain medications, so make sure to disclose all the medicines you are taking. This medication is not recommended for use in children under 2 years old or in pregnant women without medical advice.
Sources:
Do I Need Antihistamines for Allergies? (n.d.) Retrieved 8 May 2019 from https://www.webmd.com/allergies/antihistamines-for-allergies
Marshall,H. (28 February 2019). Phenergan (promethazine): an antihistamine for allergies, travel sickness and sleep. Retrieved 9 May 2019 from https://www.netdoctor.co.uk/medicines/allergy-asthma/a7343/phenergan-promethazine/
Package leaflet. PHENERGAN 0.06% Gel. Oestradiol. June 2007. Retrieved 30 April 2019 from https://downloads.dokteronline.com/leaflets/en/patient_information_leaflet-2338-phenergan-10-mg-uk-(1).pdf- 1510756508.pdf?_ga=2.7831730.1442913771.1601361456-2071352208.1599043266
Promethazine (including Phenergan). 18 September 2018. Retrieved 9 May 2019 from https://www.nhs.uk/medicines/promethazine/
Package leaflets
Read package leaflet closely before using Phenergan.
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