For male erectile dysfunction, a medicine called Sildigra, which includes sildenafil, is helpful. Impotence is another term for the inability to obtain or sustain a strong erection required for sexual activity. Sildenafil citrate should be taken orally with a glass of water. The dosage can be taken once every twenty-four hours. Avoid consuming grapefruit juice and alcohol while taking the prescription as this may negatively affect your health. Before using any medicines, see a doctor.