Both Ernafil 100mg and Viagra contain sildenafil as their active ingredient. The two are similar in terms of efficacy and mechanism of action, and are effective in treating erectile dysfunction. Ernafil generally offers better value for money and is a cost-effective choice.

Ernafil 50mg常見副作用包括頭痛、面紅、消化不良及輕微視力模糊。這些反應通常輕微且短暫。若出現嚴重不適或持續副作用，應立即諮詢醫生，確保用藥安全。

在香港，Ernafil 50mg屬於處方藥物，需經醫生診斷並開立處方後，方可於合法註冊藥房購買。建議諮詢專業藥劑師，確保透過正規途徑取得藥物。