In essence, Silagra 100 and Sildenafil are interchangeable when it comes to treating erectile dysfunction because they contain the same active ingredient, Sildenafil Citrate. The main difference is that Silagra is typically a generic version, which may be less expensive than the branded version like Viagra. As always, it's best to follow your healthcare provider's guidance when choosing or switching between medications. Manufacturers and quality control may vary slightly from brand to brand, though generics are generally required to meet the same safety and effectiveness standards as the branded versions.