一、药物概述：从意外发现到多重应用 / Drug Overview: From Accidental Discovery to Multiple Applications Viagra（枸橼酸西地那非）由美国辉瑞公司研发，是首个口服PDE5抑制剂，最初用于治疗勃起功能障碍。其核心机制是通过抑制PDE5酶，增加cGMP（环磷酸鸟苷） 水平，促进阴茎海绵体平滑肌松弛，改善血流，从而在性刺激下恢复自然勃起功能。 近年研究进一步揭示其潜在神经保护作用。例如，2025年《国际内分泌与代谢趋势报告》指出，西地那非可能通过提高脑内cGMP水平，帮助改善脑血流与神经可塑性，从而关联到阿尔茨海默病风险的降低。 Viagra (Sildenafil Citrate), developed by Pfizer, was the first oral PDE5 inhibitor approved for erectile dysfunction. It works by inhibiting the PDE5 enzyme, increasing cGMP levels, and enhancing blood flow to the penile corpus cavernosum, facilitating erections with sexual stimulation. Recent studies[…]
Author Archives: 威而钢（伟哥）
Viagra（商品名万艾可）由美国辉瑞制药研发，主要成分为西地那非，是首个口服PDE5抑制剂，用于治疗男性勃起功能障碍。其诞生充满戏剧性：最初作为心绞痛药物研发，却在临床试验中发现对改善勃起功能有显著效果，从而开创了ED治疗的新时代。 该药为蓝色薄膜衣片，规格包括25mg、50mg和100mg。需处方使用，建议在医生指导下按需服用。2022年数据显示，Viagra在全球ED治疗市场中仍占据领先地位，年处方量超800万份。 Viagra (brand name: 万艾可), developed by Pfizer, contains Sildenafil as its active ingredient. It was the first oral PDE5 inhibitor approved for treating male erectile dysfunction. Its discovery was serendipitous: initially investigated for angina, clinical trials revealed its significant effects on improving erectile function, revolutionizing ED treatment。 The medication is a blue film-coated[…]
Viagra (sildenafil) is the most well-known medication for treating erectile dysfunction (ED). If you’re searching for “where can I buy Viagra in Singapore,” you need to know the legal, safe, and reliable sources—whether online or offline. This guide covers: ✅ Where to buy Viagra legally in Singapore (with/without prescription) ✅ Official & verified online sources[…]
Erectile Dysfunction (ED) is a common health concern affecting many men in Singapore. Fortunately, effective treatments like Viagra (sildenafil citrate) are widely available. However, navigating the process of obtaining it legally and safely is crucial. This comprehensive guide will walk you through everything you need to know about getting Viagra in Singapore. Understanding Viagra and[…]
Erectile dysfunction (ED) is a common concern for men worldwide, and Singapore is no exception. With the availability of FDA-approved treatments like Viagra (sildenafil), addressing this issue has become more accessible. However, navigating where to buy Viagra in Singapore legally and safely requires careful consideration. This guide explores trusted purchasing options, including online platforms, local[…]
Viagra (sildenafil) is one of the most popular medications for treating erectile dysfunction (ED). If you’re in Singapore and wondering where to buy Viagra, you’ve come to the right place. This guide covers legal sources, online pharmacies, prescription requirements, and safety tips to help you make an informed decision. No prescription needed. Cash-on-delivery available for[…]
Old Wang, who lives next door, is 65 years old and suddenly came over mysteriously, asking if I had any Viagra. I was a bit shocked, thinking how someone of his age would still be interested in taking an erectile dysfunction drug. After some insistence from him, to avoid him overusing it and potentially having[…]
Mild headaches are a common side effect of Viagra, with 7 out of 10 users experiencing this, especially when taking higher doses. First, it’s important to note that this is a normal side effect, not an adverse reaction. Side effects are expected and generally tolerable, while adverse reactions are more serious. A little rest usually[…]
Dr. Zhang has recently noticed an influx of patients asking whether Viagra is harmful to the body. Some report symptoms like dizziness and fatigue after taking it. To address these concerns, Dr. Zhang decided to share his insights online, explaining why some users may feel weak or dizzy after using Viagra during sexual activity. Here’s[…]
Viagra has been on the market for over 20 years, providing a ray of hope for patients suffering from erectile dysfunction (ED). Its remarkable effectiveness has made it a global sensation. However, do you truly understand how Viagra works to treat ED? Today, let’s explore Pfizer, the company behind Viagra, and gain a comprehensive understanding[…]