Phenergan tablets and elixir contain the active ingredient promethazine hydrochloride, which is a type of medicine called a sedating antihistamine. Histamine is a substance produced by the body as part of its defence mechanisms. These can include inflammation in the nose or airways, rashes, and itching of the skin, eyes, nose or throat. Promethazine blocks histamine from binding to its receptors in various parts of the body and this stops it causing the symptoms of an allergic reaction. Promethazine also blocks histamine receptors in an area of the brain called the vomiting centre, which is responsible for causing feelings of sickness and for the vomiting reflex. It is activated when it receives nerve messages from the vestibular apparatus in the middle ear. The vestibular apparatus provides constant feedback to the brain about our body position. When something disturbs the vestibular apparatus, such as movements of the head when travelling by boat or car, nerve signals are sent from the vestibular apparatus to the vomiting centre. This can cause the symptoms of motion sickness, such as nausea, dizziness or spinning sensations (vertigo) and vomiting. metformina de 850 mg Here's an overview of all the non-benzodiazepine sleeping pills currently licensed in the UK. You might know a drug by its generic name or its trade name (see our page about drug names for more information on this). For detailed information about a particular drug, you can look it up in our sleeping pills and minor tranquillisers A–Z. The 'Z' drugs were designed to try to overcome some of the problems associated with benzodiazepines, but they act in a very similar way. Dependence and withdrawal symptoms are just as likely to occur as with benzodiazepines. 'Z' drugs should be given: 'Z' drugs are better than other sleeping pills for older people because their short half-life means they are less likely to accumulate in the body and cause adverse effects. After taking them you may be rather unsteady and clumsy if you need to get up during the night, e.g. * Promethazine injection is a prescription-only medicine and administered only by healthcare professionals in appropriate circumstances. Antihistamines are primarily used for treating allergic reactions and conditions such as hay fever. Purchase flagyl 500 mg Buy femara in australia Clonidine extended release Can I buy Phenergan over the counter? You do not need a prescription for Phenergan, however you will be asked to complete a short medical questionnaire by your Chemist-4-U pharmacist before we can take your order. Free UK Delivery on all orders over £30 - Delivery within 3-5 working days. Standard UK Delivery - £2.95 - Delivery within 3-5. metoprolol 500 mg Jun 20, 2017. Phenergan tablets and elixir contain the active ingredient. including those bought without a prescription and herbal medicines, before you take. Hearst Magazines UK - NetDoctor, part of the Hearst UK wellbeing network. Browse our range of herbal sleep remedies, snoring sprays & strips to help you get a better nights rest. Shop today & collect 4 Advantage Card Points for every. Both the Phenergan tablets and the Phenergan Elixir contains the active ingredient Promethazine, Promethazine is a type of medicine named a sedating antihistamine of which works by preventing the actions and effects of histamine. Histamine is produced by the body as a defence and causes symptoms of an allergic reaction such as sneezing, rashes, sore eyes, nasal congestion. Promethazine blocks the histamine receptors in the area of the brain thus preventing the messages causing the symptoms. Promethazine (Phenergan, Sominex) is an antihistamine sometimes used as a sleeping pill. It's available to buy without a prescription from a doctor. It is also an ingredient in some over-the-counter cold and flu medicines, such as Night Nurse. You can find detailed information about promethazine in the official Patient Information Leaflet (PIL), including what it's for, how to take it, possible side effects and safety information. This leaflet should come with your medication (usually inside the box). All PILs for drugs containining promethazine are available online on the electronic Medicines Compendium (e MC). If a drug can come in different forms (such as tablets or liquid), there may be a separate PIL for each one. 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