Phenergan is an antihistamine medicine that relieves the symptoms of allergies like hay fever, skin rashes, and hives. Available as Promethazine 25mg tablets, it works by blocking histamine in the body. Phenergan can also help prevent motion sickness during travel and may cause drowsiness that can aid with sleep.
It helps by calming brain activity, temporarily relieving insomnia, and managing nausea. If sleep problems persist beyond a few days, consult your doctor for appropriate treatment options.
Products With The Same Formula As Phenergan
Promethazine hydrochloride, Phenergan's active ingredient, is available under different brand names. These medications work the same way to treat allergies, nausea, and sleep issues.
Pricing and product information
These are the latest January 2025 prices. Pharmacy Prime offers same-day dispatch in London, Birmingham, Manchester, and other cities.
| Products | Package Size | Unit Price |
|---|---|---|
|
Phenergan 25mg - 56 Tablets
25mg |
56 Tablets | £19.99 |
|
Phenergan Night Time 25mg - 14 Tablets
25mg |
14 Tablets | £14.99 |
|
Promethazine Hydrochloride Generic 25mg - 56 Tablets
25mg |
56 Tablets Tablets | £19.99 |
|
Promethazine Hydrochloride Generic 10mg - 56 Tablets
10mg |
56 Tablets Tablets | £17.99 |
Frequently Asked Questions
Phenergan has sedative properties and commonly causes drowsiness. While effective, it should be used carefully as excessive doses can lead to serious side effects including extreme drowsiness, impaired coordination, breathing difficulties, and in more serious cases, seizures.
The use of Phenergan is not recommended during pregnancy. Please speak to your healthcare provider for more information.
The medication typically begins working within about 20 minutes of taking it, with drowsiness being one of the first noticeable effects. Its effects can last up to 12 hours.
Yes, Phenergan is the brand name, while promethazine is the active ingredient. As an antihistamine, it helps with allergy symptoms and reduces nausea and vomiting.
Yes, constipation is a known side effect of Phenergan. To help prevent this while taking the medication, it's recommended to maintain a fiber-rich diet including plenty of fruits and vegetables. Staying well-hydrated with 8-10 glasses of water daily can help keep stools soft. If constipation continues to be an issue, consult your healthcare provider about safe laxative options.
