两性健康
Viagra Pfizer: A Comprehensive Bilingual Guide to Uses, Benefits, and Safety Precautions
Viagra, developed by Pfizer, is a well-known medication for erectile dysfunction (ED). This article provides an original, detailed overview of its effects, uses, contraindications, specifications, and benefits, emphasizing evidence-based information and safety. Always consult a healthcare professional before use.
Click to buy1. Effects and Mechanism of Action (效果与作用机制)
English: Viagra’s active ingredient, Sildenafil Citrate, is a phosphodiesterase type 5 (PDE5) inhibitor. It works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain erections. Effects typically begin within 30–60 minutes and last 4–6 hours.
中文: 伟哥（Viagra）的主要成分是 枸橼酸西地那非，一种PDE5抑制剂。它通过增加阴茎血流量来改善勃起功能，通常在服用后30–60分钟内起效，药效持续4–6小时。
2. Primary Uses (用途)
English:
- Erectile Dysfunction (ED): Treats ED in adult men by improving blood flow to the penis.
- Pulmonary Arterial Hypertension (PAH): Sometimes used off-label to improve exercise capacity in PAH patients.
中文:
- 勃起功能障碍： 用于治疗成年男性勃起功能障碍。
- 肺动脉高压： 有时用于改善肺动脉高压患者的运动能力。
3. Specifications and Dosage (规格与剂量)
English:
- Dosage Forms: Tablets (25mg, 50mg, 100mg).
- Storage: Below 25°C, protected from moisture and light.
- Dosage: Start with 50mg, taken 30–60 minutes before sexual activity. Do not exceed once daily.
中文:
- 规格： 片剂（25毫克、50毫克、100毫克）。
- 储存： 低于25°C，避光防潮。
- 剂量： 初始剂量50毫克，事前30–60分钟口服，24小时内勿超过一次。
4. Benefits Over Alternatives (相较于替代方案的优势)
English:
- Rapid Onset: Works within 30–60 minutes, faster than some ED medications.
- Proven Efficacy: Over 80% success rate in clinical studies for ED.
- Long Safety Record: Used safely by millions worldwide since 1998.
中文:
- 快速起效： 30–60分钟内见效，快于部分ED药物。
- 高效性： 临床研究显示对ED的成功率超过80%。
- 安全性高： 自199年起全球数百万人安全使用。
5. Contraindications and Precautions (禁忌与注意事项)
English:
- Absolute Contraindications:
- Allergy to Sildenafil or similar compounds.
- Concurrent use of nitrates (e.g., nitroglycerin) due to hypotension risks.
- Severe cardiovascular, liver, or kidney diseases.
- Precautions:
- Avoid alcohol to prevent dizziness or low blood pressure.
- Discontinue if priapism (erection >4 hours) occurs.
中文:
- 绝对禁忌：
- 对西地那非或类似成分过敏。
- 与硝酸酯类药物（如硝酸甘油）同用。
- 严重心、肝、肾功能不全者禁用。
- 注意事项：
- 避免饮酒，防止低血压或头晕。
- 勃起超过4小时需立即就医。
6. Potential Side Effects (潜在副作用)
English: Common side effects include headache, flushing, nasal congestion, and indigestion. These are usually mild and temporary. Serious effects (e.g., vision loss) are rare but require immediate medical attention.
中文: 常见副作用包括头痛、面部潮红、鼻塞和消化不良，多可自行缓解。严重副作用（如视力丧失）罕见但需即时就医。
Conclusion
Viagra by Pfizer offers a reliable solution for ED, but its safe use requires adherence to dosing guidelines and contraindications. Always seek medical supervision for optimal outcomes.