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Promethazine, sold under the brand name Phenergan among others, is a first-generation antihistamine, sedative, and antiemetic used to treat allergies, insomnia, and nausea. It may also help with some symptoms associated with the common cold [ 4 ] and may also be used for sedating people who are agitated or anxious, an effect that has led to ...
The most common adverse effect is sedation; this "side-effect" is utilized in many OTC sleeping-aid preparations. Other common adverse effects in first-generation H 1 -antihistamines include dizziness, tinnitus , blurred vision, euphoria , incoordination, anxiety , increased appetite leading to weight gain , insomnia , tremor, nausea and ...
It is also purported to produce sedative effects [14] and QT interval prolongation. [15] It is also known to produce less extrapyramidal side effects than the first-generation (typical) antipsychotic, thiothixene. [16] It can also produce (usually relatively mild) dry mouth. [17] Other common adverse effects include [2] [18] [19]
A correlation exists between average clinical potency and affinity of the antipsychotics for dopamine receptors. [50] Chlorpromazine tends to have a greater effect at serotonin receptors than at D2 receptors, which is notably the opposite effect of the other typical antipsychotics. Therefore, chlorpromazine's effects on dopamine and serotonin ...
In the UK, Actavis marketed promethazine hydrochloride under the Sominex name. [41] It was available at least as early as 1985 as an OTC hypnotic. [42] Actavis also marketed a product by the name of Sominex Herbal, an herbal sleep aid with three natural active ingredients: hops, valerian, and passion flower extracts. [43]
Typical antipsychotics block the dopamine 2 receptor (D2) receptor, causing a tranquilizing effect. [5] It is thought that 60–80% of D2 receptors need to be occupied for antipsychotic effect. [5] For reference, the typical antipsychotic haloperidol tends to block about 80% of D2 receptors at doses ranging from 2 to 5 mg per day. [5]
Less-common side effects can include excess air or gas in your stomach, burping, heartburn, indigestion, fast heartbeat, low blood sugar, low energy and fatigue, or even gallstones, Dr. Comite says.
Levomepromazine, also known as methotrimeprazine, is a phenothiazine neuroleptic drug.Brand names include Nozinan, Levoprome, Detenler, Hirnamin, Levotomin and Neurocil. It is a low-potency antipsychotic (approximately half as potent as chlorpromazine) with strong analgesic, hypnotic and antiemetic properties that are primarily used in palliative care.