alexa Inhalational therapy for pulmonary arterial hypertension: current status and future prospects.
Pulmonology

Pulmonology

Journal of Pulmonary & Respiratory Medicine

Author(s): Gupta V, Ahsan F

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Abstract This review summarizes the pathophysiology and current therapeutic and drug delivery strategies for pulmonary arterial hypertension (PAH), a rare but devastating disorder of the pulmonary circulation affecting 50,000 to 100,000 persons in the United States. Chief clinical features of PAH include increased mean pulmonary arterial pressure (>25 mm Hg) and right ventricular and smooth muscle hypertrophy. A wide variety of agents have been studied for use as anti-PAH drugs, including prostacyclin analogues, endothelin receptor antagonists, and phosphodiesterase-5 inhibitors, to name a few. However, a major shortcoming of anti-PAH medications is their short half-lives, requiring them to be administered via parenteral routes, which lead to undesirable side effects, including systemic vasodilation. Inhalational delivery of anti-PAH drugs provides an attractive alternative to conventional routes, with ease of administration and minimal systemic vasodilation. Recently, the U.S. Food and Drug Administration approved inhalable iloprost (Ventavis®), a prostacyclin analogue, for PAH treatment. Other drugs being studied for their potential in inhalable PAH therapy include PGE1, treprostinil, vasoactive intestinal peptide, and fasudil. Controlled-release inhalable delivery systems for anti-PAH medications have also been proposed to facilitate long-term and selective vasodilation of pulmonary arteries. Extensive studies are warranted to develop safe and effective drug delivery systems that will provide a better quality of life to patients.
This article was published in Crit Rev Ther Drug Carrier Syst and referenced in Journal of Pulmonary & Respiratory Medicine

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