Hydroxyzine is an antihistamine used to treat symptoms of allergic reactions, such as itching and hives. It is also prescribed for anxiety, nausea, and vomiting [1]. The medication works by blocking the effects of histamine, a substance the body releases during an allergic reaction [2].
What is hydroxyzine prescribed for?
Hydroxyzine is indicated for symptomatic relief of pruritus due to allergic conditions such as urticaria and atopic dermatitis [1]. It is also used for the management of anxiety, and as a pre- and post-operative sedative to diminish |
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How does hydroxyzine work?
Hydroxyzine functions as a first-generation antihistamine. It competitively inhibits histamine H1 receptors, thereby reducing the effects of histamine release in the body. This mechanism alleviates symptoms like itching, swelling, and redness associated with allergic responses. Additionally, its central nervous system depressant effects contribute to its sedative and anti-anxiety properties [2][3].
What are the common side effects of hydroxyzine?
Common side effects associated with hydroxyzine use include drowsiness, dry mouth, and blurred vision [1]. Some individuals may also experience dizziness, confusion, or constipation [2].
How long does hydroxyzine stay in your system?
The elimination half-life of hydroxyzine averages between 7 to 20 hours in adults. This means it can take roughly 28 to 80 hours for the drug to be almost entirely cleared from the body [4].
Are there different forms of hydroxyzine available?
Hydroxyzine is available in various forms, including oral tablets, oral suspension, and an injectable solution [1].
When does the patent for hydroxyzine expire?
Hydroxyzine is an older medication, and its original patents have long expired. It is available as a generic drug [5]. Information on specific patent expirations for older drugs like hydroxyzine can be found on resources such as DrugPatentWatch.com [6].