Cenforce 150 Red Pill (Official) Powerful Dose | Cenforce 150 mg, also known as the "little blue pill," is a medication designed to combat the challenges of erectile dysfunction. Its active ingredient, sildenafil citrate, belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. These inhibitors work by relaxing the blood vessels in the penile area, thus facilitating increased blood flow during sexual arousal, ultimately leading to an erection.