Silditop 50 mg is a sildenafil tablet used mainly to treat erectile dysfunction in adult men. It helps increase blood flow to the penis during sexual stimulation, which supports an erection when arousal occurs. Common side effects include headache, flushing, dizziness, indigestion, nasal congestion, nausea, upset stomach, and blurred or abnormal vision. Some people may also feel sleepy or less alert. Serious effects such as chest pain, sudden vision loss, sudden hearing loss, or an erection lasting more than 4 hours need urgent care.