Generally, the pill is effective for 4-6 hours. How Long Does Cenforce 150 last? Cenforce 150 mg is supposed to address sexual problems in men, namely erectile issues. It is a brand variant of the trademark Viagra but is considerably cheaper in terms of price. As a result, the blood vessels in th… In erectile dysfunction, a complex protein type called phosphodiesterase type-5 deteriorates the working of another complex protein called the cGMP. What is the … Cenforce constitutes 150 mg of Sildenafil Citrate as a key ingredient.