Phenergan

Phenergan

Phenergan is an antihistamine. It is used to treat allergies, prevent nausea and help with sleeplessness. It is sometimes used after surgery to help a person deal with the sickness which can occur after a general anesthetic has been administered. More information

A doctor will review your order and write you a prescription, if appropriate. This prescription is then forwarded to a pharmacy. The pharmacy will have your medicine delivered to you within one to three working days. Read more about this process here.

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Phenergan elixir 5 mg/5 ml 100 ml.

Phenergan 10 mg 56 tabl.

Phenergan 25 mg 56 tabl.

Phenergan is an antihistamine medication that is commonly used to treat allergic reactions, sometimes used to treat nausea and can also be used to treat sleeping problems. This medicine works by blocking the histamines in the body that cause an allergic reaction. Phenergan is the brand name for Promethazine hydrochloride. It comes in the form of tablets or a syrup. 

What is Phenergan? 

Phenergan is an antihistamine. It is used to treat allergies, prevent nausea and help with sleeplessness. It is sometimes used after surgery to help a person deal with the sickness which can occur after a general anesthetic has been administered. It can also be used before an operation to help you feel more relaxed. Antihistamine medication blocks the histamines that the body naturally releases as a reaction to an allergy. Histamines are chemicals that cause the body to fight allergens – the substances that cause the allergic reaction.  Phenergan belongs to the group of medicines known as phenothiazines. 

Allergic Reaction 

When an allergic reaction occurs the body operates its defence system to fight the allergy. If a person comes into contact with something they are allergic to the immune system reacts. The body produces histamines which cause the symptoms of the allergic reaction. These symptoms are typically: 

  • runny nose 
  • sneezing 
  • itchy skin (hives) 
  • stuffy nose 
  • itchy mouth 
  • watery eyes 

An antihistamine such as Phenergan can stop the symptoms of an allergic reaction by preventing the histamines in the body from joining to its receptors.  Common allergies that result in an allergic reaction are: 

  • insect bites 
  • pollen 
  • dust mites 
  • pet dander (not animal hair as is often believed) 

Antihistamines are also used to treat hayfever, which is a common problem for many people. Hayfever occurs when the immune system has a reaction to allergens in the air and many of the symptoms are those listed above. 

Sickness 

Phenergan can also block the receptors in the brain that cause the desire to be sick. When sickness occurs the brain receives messages from the inner ear telling the body to expel the vomit.  Therefore Phenergan is used to treat different kinds of sickness including travel sickness (also known as motion sickness). Travel sickness occurs when you feel unbalanced due to travelling in a vehicle or on a boat.   Phenergan can also be used to treat morning sickness (feeling sick when you are pregnant - especially in the early stages). However, it should not be used during the last six months of pregnancy and if taken at the beginning stage should only be used for the shortest time possible under supervision from your doctor. 

Sleeplessness 

Phenergan causes drowsiness and can make you feel more relaxed. It can be used as a short-term solution to being unable to get to sleep, for example when you are worried about a situation or if you are unable to sleep due to a cough or cold. It is not a long term sleeping medication. If you often have problems not being able to sleep you should consult a doctor. 

When is Phenergan used? 

Phenergan is used to treat allergic reactions, some forms of sickness (morning sickness and travel sickness), occasional difficulty sleeping, pre-operative nerves and sometimes for post-operative sickness. It can be used as an antihistamine for allergies and travel sickness in children over two years of age on the advice of a doctor or pharmacist. Phenergan should not be given to children under two years old. For sleeplessness, Phenergan should only be taken by adults. It is not a  long-term solution to insomnia. 

How do you use Phenergan? 

Phenergan comes in both tablet and syrup form. The tablets are 10mg or 25mg and are swallowed with a glass of water. They can be taken with or without food. You should not chew the tablets. The syrup can be accurately measured using the dosage beaker, spoon or syringe supplied in the pack to ensure the correct dose is taken.  If Phenergan is used for travel sickness it should be taken 30-60 minutes before the journey begins. If it is taken for allergies it is taken as soon as the reaction occurs. For sleeplessness, you should take one 25mg tablet up to an hour before going to bed to allow it time to work. It should only be used for occasional sleeping problems. If you are unable to sleep consistently you should talk to your doctor. 

What dosages are there? 

Phenergan is available in dosages of 10mg or 25mg tablets or a syrup of 5mg/5ml 100ml. The usual dosages are: 

  • Allergies - 12.5mg twice a day (half a 25mg tablet) or 25mg once a day 
  • Vomiting and nausea (including morning sickness) 25mg every hours as required 
  • Travel sickness – 25mg twice a day 

However, please note the above are only usual dosages. It is important you follow the advice of your doctor or pharmacist when taking Phenergan as they may recommend a different dose that suits your individual situation.  Phenergan must not be given to children under two years of age. Children aged two and above may be given Phenergan in syrup form. When taking the liquid form of Phenergan you must use the plastic measuring beaker, syringe or spoon supplied. Do not use a kitchen teaspoon as this will not measure the correct amount accurately. 

What are the side effects of Phenergan? 

As with all medicines, Phenergan can have some side effects. The effects that may occur and the extent to which will depend on the individual person. Some people may experience one or more side effects while others may not experience any. People over sixty-five years of age are more likely to experience side effects. It is possible that this medicine can cause children to become over-excited or restless. Possible side effects include: 

  • drowsiness 
  • nausea and vomiting 
  • dizziness 
  • difficulty urinating 
  • dry mouth 
  • constipation 
  • headaches 
  • confusion 
  • nightmares 
  • blurred vision 

If you experience any of the above symptoms while taking Phenergan you should discuss them with your doctor or pharmacist. It is also important to inform your doctor of any other medications you may be taking before commencing with Phenergan, including herbal medicines. 

Occasionally Phenergan can make your skin more sensitive to sunlight than usual. For this reason, it is advisable to stay out of direct sunlight whilst taking this medicine. If you are not taking Phenergan to help with sleeping but it makes you feel drowsy you should not operate machinery or drive until this feeling passes. It can take up to twelve hours after taking a dose of Phenergan for the drowsiness to wear off. This also applies if Phenergan makes you unable to concentrate or unaware of your surroundings. If Phenergan makes you feel dizzy you should sit or lie down until the feeling passes. If you experience headaches while taking Phenergan you should drink plenty of water and rest. For a full list of potential side effects please refer to the medicine leaflet. 

When shouldn’t you use Phenergan? 

You should not use Phenergan if you are allergic to any of the ingredients listed on the package leaflet. Children under two years of age should not be given Phenergan. You should only use Phenergan for morning sickness if you are pregnant on the advice of a doctor. You should not take Phenergan during the last six months of pregnancy as it could harm the unborn baby. To be completely safe it is advisable to take Phenergan for morning sickness for the shortest time possible. You should not take Phenergan if you are breastfeeding as it passes into the breast milk. If you are trying to get pregnant it is important you tell your doctor this before taking Phenergan as they may advise against it. Be aware that if you are taking Phenergan for sickness or allergies it could make you feel tired and sleepy. Phenergan should not be taken long-term and should only be used on the advice of a doctor or pharmacist. 

When shouldn’t you use Phenergan? 

You should not use Phenergan if you are allergic to any of the ingredients listed on the package leaflet. Children under two years of age should not be given Phenergan. You should only use Phenergan for morning sickness if you are pregnant on the advice of a doctor. You should not take Phenergan during the last six months of pregnancy as it could harm the unborn baby. To be completely safe it is advisable to take Phenergan for morning sickness for the shortest time possible. You should not take Phenergan if you are breastfeeding as it passes into the breast milk. If you are trying to get pregnant it is important you tell your doctor this before taking Phenergan as they may advise against it. Be aware that if you are taking Phenergan for sickness or allergies it could make you feel tired and sleepy. Phenergan should not be taken long-term and should only be used on the advice of a doctor or pharmacist. 

Where can you buy Phenergan? 

You can buy Phenergan at a pharmacy without a prescription. You should follow the advice of a pharmacist or doctor before taking Phenergan. 

Can I get Phenergan without a prescription? 

Yes. Phenergan is both a prescription and non-prescription medication. It should be taken on the advice of your doctor or pharmacist. 

Sources 

Package leaflet. PHENERGAN 0.06% Gel. Oestradiol. June, 2007. Retrieved 30 April, 2019 from https://www.dokteronline.com/pils/en/patient_information_leaflet-3749-Phenergan-uk.pdf-1510756509.pdf 

Marshall,H. (2019, February 28). 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/ 

Promethazine (including Phenergan). 18 September, 2018. Retrieved 9 May, 2019 from https://www.nhs.uk/medicines/promethazine-including-phenergan/ 

Do I Need Antihistamines for Allergies? (n.d.) Retrieved 8 May, 2019 from https://www.webmd.com/allergies/antihistamines-for-allergies