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Mirodenafil is a second-generation, reversible, and selective phosphodiesterase 5 (PDE5) inhibitor developed for the treatment of erectile dysfunction. It is a small molecule pyrrolopyrimidinone compound that works by inhibiting PDE5, thereby suppressing cGMP hydrolysis in cavernosal smooth muscle. This leads to smooth muscle relaxation and increased blood flow to the penis during sexual stimulation. Mirodenafil has higher selectivity for PDE5 compared to other PDEs and demonstrates greater selectivity over PDE6 than sildenafil, reducing the risk of visual side effects. It was approved in South Korea in 2007 for erectile dysfunction and has also been investigated for use in kidney diseases, urologic diseases, renal insufficiency, lower urinary tract symptoms/benign prostatic hyperplasia (LUTS/BPH), and Alzheimer’s disease due to its ability to cross the blood-brain barrier and modulate multiple signaling pathways relevant to neurodegeneration[2][3][4][5][6].
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