A combination of sildenafil and zudena 100 mg tablets is used to treat low erection issues. A 100 mg pill of Zudena is a very powerful medication that gives adult males more strength during sexual activity. The active ingredient, sildenafil, is present in a 20 mg dosage in Zudena 100 mg tablets. https://www.medypharmacy.com/product/zudena-100/