Black viagra 200mg, containing sildenafil citrate, is used to treat erectile dysfunction. Common side effects include headaches, flushing, indigestion, nasal congestion, dizziness, and visual disturbances such as blurred vision or a blue tint. Less common but more severe side effects can include sudden hearing loss, priapism (a painful erection lasting more than four hours), and heart-related issues like chest pain, irregular heartbeat, or shortness of breath. It is crucial to consult a healthcare provider before using Cenforce, especially for individuals with pre-existing health conditions or those taking other medications, as it can interact with certain drugs and exacerbate health problems.