Silditop 50 mg contains sildenafil citrate, a prescription medicine used to treat erectile dysfunction. You should only buy it online with a valid prescription from a licensed doctor. Legitimate online pharmacies will require you to upload or enter your doctor’s prescription before completing the purchase. Buy from verified, licensed pharmacies with clear contact info and regulatory credentials. Avoid sites that sell ED meds without asking for a prescription. Many online ED products may be fake, contain wrong ingredients, or incorrect doses if sold without verification. Counterfeit pills can be ineffective or harmful.