Cen is a brand of sildenafil citrate, which is a medication primarily used to treat erectile dysfunction (ED), but also sometimes used for pulmonary arterial hypertension.

Sildenafil is the active ingredient in Viagra, one of the most well-known medications for ED. It works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which in turn allows for the expansion of vessels and increased flow to the penis, enabling an erection in response to sexual stimulation.

Cen is typically available in a variety of doses, including Cen 25, Cen 50, Cen 100 mg, Cen 150 mg, and Cen 200 mg. It's crucial to follow your healthcare provider's directions when using this medication to ensure it's safe and effective for you.

Possible side effects include headaches, flushing, upset stomach, abnormal vision, nasal congestion, back , myalgia, nausea, dizziness, and rash. More serious side effects are rare but can include an erection lasting longer than 4 hours, sudden vision loss in one or both eyes, or sudden hearing loss or decrease in hearing.

It's also important to note that sildenafil can interact with certain other medications, including nitrates (often prescribed for chest ), as this can cause a dangerous drop in pressure.

Lastly, while sildenafil can help with achieving an erection, it does not cure erectile dysfunction or increase sexual desire. Always consult with a healthcare provider for the best treatment options for ED based on your specific health situation.

As of my knowledge, the cutoff is September 2021. Always consult with a healthcare provider for the most current information.