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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 ...
In 1947, it synthesized promethazine, a phenothiazine derivative, which was found to have more pronounced sedative and antihistaminic effects than earlier drugs. [ 59 ] : 77 A year later, the French surgeon Pierre Huguenard used promethazine together with pethidine as part of a cocktail to induce relaxation and indifference in surgical patients.
Some of the antihistamines, namely promethazine and doxylamine, are available for purchase over-the-counter (OTC) and can be bought by the public in some countries for the occasional relief of insomnia. [28] Low-dose doxepin is approved by the FDA for the treatment of insomnia. [5]
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]
A toxic dose for children of more than 1.8 mg/kg has been reported. A 3-year-old child died 18 hours after ingesting 1,000 mg doxylamine succinate. [ 5 ] Rarely, an overdose results in rhabdomyolysis and acute kidney injury .
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.