system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following drug used in the Management of Pulmonary Hypeension acts by inhibiting Phosphodiesterase enzyme?
assistant
The correct answer is  First line drugs for Functional class II-III PAH : cGMP Signaling Modulators: PDE-5 Inhibitors - Sildenafil, Tadalafil, Vardenafil cGMP Signaling Modulators: sGC Stimulator - Riociguat Endothelin Receptor Antagonists - Bosentan, Ambrisentan First line drugs for Functional class IV PAH: IP Receptor Agonists: Prostacyclin and Prostacyclin Analogs - Epoprostenol, Selexipag . L-type Ca2+ Channel Blockers like Nifedipine, Amlodipine: Use only in PAH patients with positive vasodilator testing.