Silagra with an active ingredient A safe PDE-5 inhibitor for treating erectile dysfunction is sildenafil citrate. When using Silagra, avoid having large meals since this may postpone the medication's start of action. Tell your doctor if you have any heart, kidney, or liver issues before starting Silagra. Additionally, if you take medication and have pulmonary arterial hypertension, you must let your doctor know. The most typical negative effects of using Silagra include headache, dizziness, blurred vision, flushing, and soreness in the muscles. If you experience any side effects, speak with your doctor. It must be taken exactly as prescribed by your physician. About an hour before you intend to have sex, you should take it. This aids in developing and keeping an erect, hard penis that is appropriate for intercourse.