Urapidil

Urapidil

Chemical structure of Urapidil

Urapidil 25mg/5ml vials

Urapidil is a medication primarily used to treat hypertension (high blood pressure). It is known for its dual mechanism of action, which involves both alpha-1 adrenergic receptor antagonism and serotonin receptor agonism.

Mechanism of Action

Urapidil works by blocking alpha-1 adrenergic receptors, which leads to the relaxation of vascular smooth muscle and a subsequent decrease in peripheral vascular resistance. This action helps to lower blood pressure. Additionally, urapidil acts as an agonist at certain serotonin receptors, which may contribute to its antihypertensive effects by modulating central nervous system activity.

Clinical Use

Urapidil is used in the management of hypertensive emergencies and severe hypertension. It is administered intravenously in acute settings to rapidly reduce blood pressure. The drug is also available in oral formulations for chronic hypertension management.

Side Effects

Common side effects of urapidil include dizziness, headache, and nausea. These effects are generally mild and transient. In some cases, patients may experience hypotension (abnormally low blood pressure), which requires careful monitoring during treatment.

Pharmacokinetics

Urapidil is metabolized in the liver and excreted primarily via the kidneys. It has a relatively short half-life, necessitating frequent dosing or continuous infusion in acute settings.

Related Pages

• Hypertension
• Adrenergic receptor
• Serotonin receptor

References

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  Chemical structure of Urapidil
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  Urapidil 25mg/5ml vials on a yellow background
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  Tear gas shells used in Istanbul in 2013