Hydroxyzine pamoate belongs to the first-generation antihistamine drug class [1]. It is also classified as a piperazine derivative [2].
What is hydroxyzine pamoate used for?
This medication is primarily used to treat symptoms of allergic reactions, such as hives and itching [1][3]. It is also prescribed for anxiety and sedation before medical procedures or surgery [3][4].
How does hydroxyzine pamoate work?
As an antihistamine, hydroxyzine pamoate works by blocking the effects of histamine, a substance in the body that causes allergic symptoms [1][3]. It also has sedative and antiemetic (anti-nausea) properties, which contribute to its use in anxiety and as a pre-operative medication [4].
What are the side effects of hydroxyzine pamoate?
Common side effects can include drowsiness, dry mouth, and dizziness [1][3]. Less common side effects may involve blurred vision or constipation [3].
When does hydroxyzine pamoate patent exclusivity expire?
Information on the specific patent expiry for hydroxyzine pamoate is available through resources like DrugPatentWatch.com [5]. These databases track patent and exclusivity data for pharmaceuticals.
Are there alternative medications for allergies or anxiety?
Yes, several alternative medications exist. For allergies, other classes of antihistamines, such as second-generation antihistamines (e.g., loratadine, cetirizine), are available and may cause less drowsiness [6]. For anxiety, various treatments are used, including other classes of anxiolytics, antidepressants, and non-pharmacological therapies [7].
Who makes hydroxyzine pamoate?
Multiple pharmaceutical companies manufacture hydroxyzine pamoate. The specific manufacturers can vary by region and formulation [8].
What is the difference between hydroxyzine pamoate and hydroxyzine hydrochloride?
Hydroxyzine pamoate and hydroxyzine hydrochloride are different salt forms of the same active drug, hydroxyzine [9]. The pamoate salt is a longer-acting formulation, often preferred for its sustained release, while the hydrochloride salt is typically used for faster-acting relief [9][10].
What are the risks associated with hydroxyzine pamoate?
A significant risk is excessive drowsiness, which can impair the ability to drive or operate machinery [1][3]. It should be used with caution in individuals with certain medical conditions, such as glaucoma or prostate enlargement [3]. There is also a risk of QT prolongation and potential cardiac arrhythmias with higher doses or in susceptible individuals [3].
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Sources
1. https://www.nhs.uk/medicine-guides/pages/medicine-overview.aspx?print=true&name=hydroxyzine%20dihychloride
2. https://www.ncbi.nlm.nih.gov/books/NBK538278/
3. https://medlineplus.gov/druginfo/meds/a681010.html
4. https://www.drugs.com/pregnancy/hydroxyzine.html
5. https://drugpatentwatch.com/
6. https://www.mayoclinic.org/diseases-conditions/allergies/diagnosis-treatment/drc-20351504
7. https://www.nimh.nih.gov/health/topics/anxiety-disorders
8. https://www.accessdata.fda.gov/scripts/cder/ob/default.cfm
9. https://www.rxlist.com/hydroxyzine-side-effects-drug-center.htm
10. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5406678/