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COMPARATIVE STUDY
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RANDOMIZED CONTROLLED TRIAL

Pharmacokinetics and Tolerability of the Novel Oral Prostacyclin IP Receptor Agonist Selexipag

Priska Kaufmann, Kaori Okubo, Shirin Bruderer, Tim Mant, Tetsuhiro Yamada, Jasper Dingemanse, Hideya Mukai
American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions 2015, 15 (3): 195-203
25850750

PURPOSE: Targeting the prostacyclin pathway is an effective treatment option for pulmonary arterial hypertension (PAH). Patients with PAH have a deficiency of prostacyclin and prostacyclin synthase. Selexipag is an orally available and selective prostacyclin receptor (IP receptor) agonist. Selexipag is hydrolyzed to its active metabolite ACT-333679, also a selective and potent agonist at the IP receptor.

METHODS: In this phase I study the pharmacokinetics (PK) and tolerability of single and multiple ascending doses of selexipag were investigated in a double-blind, placebo-controlled manner in 64 healthy male subjects. An additional group of 12 subjects received an open-label dose of selexipag 400 μg in the fasted condition and after a meal.

RESULTS: Maximum plasma concentrations of selexipag and ACT-333679 were reached within 2.5 and 4 h, respectively, with mean half-lives of 0.7-2.3 and 9.4-14.22 h. In the presence of food, exposure to ACT-333679 was decreased by 27 %. The most frequent adverse event was headache. Selexipag was well tolerated up to a single dose of 400 μg and multiple doses of 600 μg following an up-titration step. No relevant treatment-related effects on vital signs, clinical laboratory, and electrocardiogram (ECG) parameters were detected.

CONCLUSION: Selexipag exhibits a good tolerability profile and PK properties that warrant further investigation.

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