What is Phenergan?
Phenergan is a branded version of promethazine hydrochloride, a phenothiazine drug that also works as an antihistamine. It has several uses, including the prevention and treatment of motion sickness, as well as helping you to avoid hay fever symptoms, or easing them if you do experience them.
Phenergan helps to block histamine, which the body naturally produces during an allergic reaction as an immune response. However, in instances such as pollen allergies or hay fever, the symptoms that histamine causes can be bothersome and get in the way of your daily life. That’s why taking an antihistamine such as Phenergan can be useful, as it can reduce your symptoms and allow you to carry on as normal.
Whilst Phenergan is safe for a majority of people to take, there are some that may need to avoid the drug due to certain health conditions or medicines they may be taking that could interact with promethazine hydrochloride.
If you have any of the following health problems, you should speak to your GP about your symptoms and ask about suitable medicines that you may be able to take instead of Phenergan:
Allergy to promethazine
Severe dizziness, drowsiness or headaches
Serious heart problems
Narrow angle glaucoma
Your GP may suggest an alternative antihistamine, or allow you to take Phenergan under close supervision.
In addition to any health problems that may cause issues with Phenergan, there are also certain other medicines that have been known to interact with it and cause potentially dangerous side effects. Because of this, if you’re taking any of the following medications, you should also speak to your GP about whether you should take Phenergan, or if there are any suitable alternatives for you:
- Some medicines for depression such as amitriptyline
- Medicines that help you sleep or make you feel more relaxed
Phenergan is most commonly available in tablet form, which currently come in two dosage options – 10mg tablets and 25mg tablets. As the recommended adult dose for hay fever ranges from 25-50mg daily, you might find that it’s best to buy the Phenergan 25mg tablets unless you’ve been advised otherwise by your own GP or pharmacist.
Phenergan is also available as a liquid, or elixir. This is popular with people that struggle to take tablets, as most medicine is easier to swallow when it’s in the form of a liquid or syrup. This form of Phenergan contains the same active ingredient as the tablets, and should work in the same way.
Bottles of Phenergan elixir are available in 100ml, and each 5ml spoonful contains 5mg of promethazine hydrochloride.
For allergies and hay fever, the recommended adult dosage is one 25mg tablet daily. This can be increased to one 25mg tablet twice a day if you’re still suffering with some allergy symptoms. You should not take more than two 25mg tablets in a day.
If you’re taking Phenergan as an elixir, the patient information leaflet recommends starting with two 5ml doses twice a day (a daily total of 20mg). If you find that you need more medication to ease your symptoms, the elixir dose can be increased to up to four 5ml doses three times a day, with the maximum daily dose being 60mg.
If you’re unsure about how much Phenergan to take, you should ask your local pharmacist for advice, but the general advice with most medicines is to use the lowest effective dose for the shortest amount of time possible.
Phenergan side effects
Phenergan isn’t a prescription medicine, but it can still cause side effects, so it’s important to be aware of these before you take any of the medication. This is so that you can be fully aware of any symptoms you might experience as a result of taking Phenergan.
Some of the most commonly reported side effects include:
Inability to urinate
Loss of appetite
Low blood pressure
These side effects are usually only mild, and shouldn’t need extra treatment unless they are bothering you or making you feel unwell or uncomfortable. If this is the case, you should either speak to your local pharmacist, or make an appointment to see your own GP about what you may be able to do for the side effects. They may suggest trying an alternative treatment to see if your medication related symptoms decrease.
As Phenergan may cause drowsiness, it isn’t recommended to drive or operate machinery whilst taking it, or if you experience any side effects that might impair your reactions. If you do need to drive or work in a job that requires you to operate machinery, you may want to consider taking another medication that doesn’t include drowsiness as a side effect. If you’re taking Phenergan for hay fever, alternative antihistamines include cetirizine, loratadine, or the prescription medicine, fexofenadine. You should always speak to your GP before taking a new medication.
It’s important to know that you shouldn’t drink alcohol whilst taking Phenergan. This is because it can affect the way the medicine works in your body, and can be potentially dangerous. As alcohol can make you drowsy, mixing it with Phenergan could be unsafe, so it’s best to avoid it.
Because Phenergan is known to cause increased sensitivity to light in some people, it’s advised that you stay out of direct sunlight wherever possible, and use sun cream for extra protection. This is to ensure that your skin doesn’t become damaged from the sun.
In addition to these, there are also some serious side effects that you should know about. These include:
- Allergic reaction
- Liver problems that may cause jaundice
- Muscle stiffness
- Loss of control over some head or facial muscles
- Facial spasms
- Unusual tongue movements
- Rolling eyes
- Fast or uneven heart beat
- Long lasting tiredness
- Over active behaviour in children
If you experience any of these serious side effects, you should call 999 or go to your nearest A&E department, explaining your symptoms and that you have taken medication containing promethazine.
What is Phenergan used for?
Phenergan can be used to treat or prevent several illnesses, such as allergies and hay fever, short-term insomnia, and even motion sickness. However, you should always ask the advice of your doctor or local pharmacist before taking Phenergan for any condition for the first time.
For motion sickness, it’s recommended for adults to take 25mg of Phenergan the night before a long journey, or around 1-2 hours before you embark on a shorter journey.
Phenergan can be used for the short term treatment of insomnia because it can cause drowsiness and tiredness. Because of this, it isn’t recommended to drive after you’ve taken Phenergan due to the fact that your reactions may be impaired.
Phenergan for sleep
Phenergan is sometimes recommended for the short term treatment of insomnia. For example, if you’re struggling to sleep due to symptoms of a cold, or if you’re experiencing some stress such as an upcoming exam or presentation that’s making you anxious and interfering with your sleep.
If you’re experiencing sleeping problems and would like to try Phenergan for it, you should click here to answer some consultation questions about your insomnia where you’ll be able to choose a treatment.
Phenergan over the counter
Phenergan should be available over the counter in most pharmacies without the need for a prescription. However, because of the classification of the medicine, you may still need to answer questions from a pharmacist so that they can make sure that it’s safe for you to take. If you’d like to do this in private, the pharmacist should have a room for you to answer these questions away from other customers at the counter.
Alternatively, you may choose to buy Phenergan online from Doctor4U, where you can answer our pharmacist’s questions at a time and place that suits you. If your order is approved, it will be shipped straight to your address without the need to wait in any queues.
As you don’t need a prescription to buy Phenergan, the consultation questions should be relatively short.
Is promethazine the same as Phenergan?
Promethazine hydrochloride is the active ingredient in Phenergan. Whist some people prefer the brand name to the generic version and vice versa, both medicines should work in exactly the same way, as the ingredient and action of both should be the same.
Phenergan is generally more expensive than generic promethazine hydrochloride, as it is a branded version of the drug, but some people prefer to use it due to the fact that it is a recognised and trusted name. However, we do also offer generic UK promethazine for those that are looking for the non-branded version. Please note that the manufacturer of the branded version may vary depending on the stocks from suppliers.
Phenergan during pregnancy
The patient information leaflet for Phenergan states that you must not take the medication during the two weeks before you are due to give birth.
You should always speak to your own GP before taking any medicines whilst you’re pregnant, even if you’ve taken them before you were carrying a baby. This is because certain medicines may affect your baby whilst it is in the womb.
Phenergan may be safe to take during pregnancy, but you should always check with your own doctor first.
If you are breast feeding, you are advised to avoid taking Phenergan, as some of the medicine is known to pass through a mother’s breast milk and affect the nursing child. However, there may be some suitable alternative medications that are safe to use whilst breast feeding. You should speak to a doctor or pharmacist about other treatments you might be able to use, such as cetirizine or loratadine for allergies and hay fever.
You can buy Phenergan from Doctor4U after answering a few short consultation questions. Although you don’t need a prescription to buy Phenergan in the UK, you will still need to answer some questions so that our healthcare professionals can make sure that it’s suitable for you to take.
When you buy Phenergan from Doctor4U, you’re buying from a licensed and regulated online prescribing service that uses a UK-based pharmacy for dispensing. This means that you’re guaranteed a genuine product that’s passed healthcare regulations within the UK.