Promethazine 25mg Tablets for| Allergies & Travel Sickness

Treatment Details

Treatment Details
Additional Information
Directions
Side Effects

What is Promethazine 25mg Tablets?

Promethazine 25mg Tablets contain promethazine hydrochloride, an antihistamine medicine that helps relieve a range of allergic symptoms. It is commonly used to treathay fever, skin allergies, hives (urticaria), itchy rashes, and allergic reactions. It is also widely used to prevent and treat travel sickness and, in some cases, provide short-termrelief from occasional insomnia.
Promethazine has been used safely for many years and is suitable for adults and children over an appropriate age when taken as directed. As it can cause drowsiness, many people find it particularly helpful when allergy symptoms are disturbing sleep.
Whether you are experiencing seasonal hay fever, itching caused by allergies, or looking for an effective treatment for motion sickness before travelling, Promethazine 25mg Tablets offer reliable symptom relief.

How does Promethazine work?

Promethazine works by blocking the effects of histamine, a naturally occurring chemical released by the body during an allergic reaction.
Histamine is responsible for many common allergy symptoms including:
- Sneezing
- Runny nose
- Itchy eyes
- Watery eyes
- Skin irritation
- Hives
- Swelling
By preventing histamine from attaching to its receptors, Promethazine helps reduce these symptoms.
Promethazine also affects the brain's vomiting centre and balance system, making ithighly effective at preventing nausea, vomiting and travel sickness. Its sedative properties can also help people who are struggling to sleep due to allergies ortemporary discomfort.
Most people begin to notice the effects within around 20 minutes, with benefits lasting several hours.
Promethazine is suitable for several different conditions, making it a versatile antihistamine treatment.
It may be used for:
- Hay fever
- Year-round allergies
- Skin allergies
- Hives (urticaria)
- Itchy skin
- Insect bite reactions
- Travel sickness
- Nausea and vomiting associated with motion sickness
- Short-term sleeplessness where sedation is appropriate
Because Promethazine commonly causes drowsiness, it should not be taken before driving, cycling or operating machinery. Alcohol should also be avoided while taking this medicine as it can increase the sedative effects.
This medicine may not be suitable for everyone. Inform your healthcare professional if you have asthma, glaucoma, epilepsy, prostate problems, liver disease, breathing difficulties or are pregnant or breastfeeding.
Always take Promethazine exactly as directed by your healthcare professional or according to the patient information use Promethazine exactly as advised and avoid exceeding the recommended dose.
Always take Promethazine exactly as directed by your healthcare professional or according to the patient information leaflet.
For allergies

Adults usually take 10mg to 25mg, particularly at night if drowsiness is beneficial. The exact dose depends on the condition being treated.
For travel sickness

Take the first dose approximately 1 to 2 hours before travelling. Additional doses maybe taken if required according to the instructions provided.
For short-term insomnia

A single dose is usually taken at bedtime for temporary relief of sleeplessness.
General advice
- Swallow tablets whole with water.
- Can be taken with or without food.
- Do not exceed the recommended daily dose.
- Avoid alcohol while taking Promethazine.
- Do not drive or operate machinery if you feel sleepy.
- Keep out of the sight and reach of children.
- Always read the patient information leaflet before use.
Like all medicines, Promethazine can cause side effects, although not everybody experiences them.
Common side effects
- Drowsiness
- Sleepiness
- Dry mouth
- Dizziness
- Blurred vision
- Headache
- Feeling tired
Less common side effects
- Constipation
- Difficulty passing urine
- Confusion, particularly in older adults
- Increased sensitivity to sunlight
Serious side effects

Stop taking the medicine and seek immediate medical advice if you experience:
- Signs of a severe allergic reaction
- Difficulty breathing
- Swelling of the face, lips, tongue or throat
- Seizures
- Unusual muscle movements
- Yellowing of the skin or eyes
- Severe skin rash
If you experience any unexpected or troublesome side effects, speak with yourpharmacist or doctor.

Frequently asked questions

1. What is Promethazine 25mg Tablets used for?
Promethazine 25mg Tablets are used to relieve allergy symptoms including hay fever, itchy skin, hives and allergic rashes. They are also commonly used to prevent travel sickness, reduce nausea caused by motion sickness and provide short-term relief from occasional difficulty sleeping. Many people choose Promethazine because it can effectively treat several conditions with one medicine.
How quickly does Promethazine start working?
Promethazine usually begins working within 20 to 30 minutes after taking a dose. For travel sickness, it is recommended to take the tablet one to two hours before travelling to allow enough time for the medicine to take effect.
Does Promethazine make you sleepy?
Yes. Drowsiness is one of the most common effects of Promethazine. Many people take it in the evening because of its sedative effect. You should avoid driving, cycling or operating machinery until you know how the medicine affects you.
Can I buy Promethazine online in the UK?
Yes. You can request Promethazine online through Curely following a clinical assessment to determine whether the treatment is appropriate for you. Buying from a registered UK online pharmacy helps ensure that you receive genuine medication supplied safely and responsibly.
Is Promethazine good for hay fever?
Yes. Promethazine is an effective antihistamine for treating hay fever symptoms such as sneezing, runny nose, itchy eyes and watery eyes. It helps reduce the body's allergic response by blocking histamine.
Can Promethazine help with travel sickness?
Yes. Promethazine is widely used to prevent and treat travel sickness. It helps reduce nausea, vomiting and dizziness associated with car, sea and air travel. Taking the tablet before travelling usually provides the best protection.
Can I drink alcohol while taking Promethazine?
No. Alcohol can significantly increase the sedative effects of Promethazine, making you feel much sleepier and impairing your judgement and coordination. It is best to avoid alcohol completely while taking this medicine.
Who should not take Promethazine?
Promethazine may not be suitable for everyone. It should be used with caution in people with asthma, glaucoma, epilepsy, prostate enlargement, liver disease or certain breathing conditions. It may also not be appropriate during pregnancy or breastfeeding. Always complete the medical assessment before purchasing treatment from Curely.
How long can I take Promethazine?
For allergies, Promethazine may be used as advised by your healthcare professional. For temporary insomnia, it should generally only be used for short periods. If symptoms continue or become worse, you should seek further medical advice to identify the underlying cause.
What should I do if I miss a dose?
If you forget to take a dose for allergies, take it when you remember unless it is nearly time for your next dose. Do not take a double dose to make up for a missed dose. If you are taking Promethazine for travel sickness, simply follow the dosing instructions for your journey and continue with the next scheduled dose if needed.