You should not take Cenforce 150mg Tablets if you suffer from any known heart or circulatory problems, if you have undergone surgery or if you are pregnant. This medicine is not recommended for men who have not completed the age of fifty. You should ask your doctor or pharmacist if you need to increase the dosage, the number of tablets that you take per day or the pattern in which you take the tablets. The doctor may also prescribe a different brand. You should not exceed the recommended dose for more than four weeks.