Some Facts about Sildenafil Citrate 100mg (Sildigra) : Sildenafil Citrate 100mg is used to treat male sexual function problems (impotence or erectile dysfunction) by blocking a certain enzyme (phosphoiesterase-PDES) in the body. In combination with sexual stimulation, Sildenafil Citrate works by helping the blood flow into the penis to achieve and maintain an erection. How to take Sildenafil Citrate 100mg (Sildigra) : Take Sildenafil Citrate 100mg at least 30 minutes before, but not more than 4 hours before sexual activity (1 hour before is the most effective). While taking Sildigra (Sildenafil) you should avoid meals high in fat. Foods high in fat can slow down the effectiveness of Sildigra (Sildenafil). Who should not take Sildenafil Citrate 100mg (Sildigra) : Do not take Sildenafil Citrate 100mg, if either anyone has allergies or taking any form of nitroglycerin or those who have had a heart attack, stroke, severe high or low blood pressure or life threatening heart irregularities. This drug does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis). Keep in mind, it is not for persons with conditions such as sickle cell anemia, multiple myeloma or leukemia. Seek medical advice with genital deformities such as Peyronie’s disease; also if you have a bleeding disorder, peptic ulcer, or retinitis pigmentosa.