Male impotence is treated with Cenforce 100 vs Viagra tablets. For the treatment of erectile dysfunction, this medication is quite helpful and effective. Sildenafil, an ingredient in this medication, aids in sustaining a powerful erection during sexual activity. Take this medication an hour before sexual activity. This medication has a 3 to 6-hour half-life. When using this medication, avoid fatty meals and alcoholic beverages. This medication has a 36-hour half-life. Follow your doctor's advice when taking this medication.