###Human: Shall I take Tadalafil tablet to maintain erection? ###Assistant: Hi. You can safely take tablet Tadalafil (10 mg or 20 mg) half an hour before sexual activity. It can be taken on alternate days if needed because the effect lasts for two days. You could also take tablet Tetrafol plus (combination of Levomefolate calcium, Pyridoxal 5-phosphate and Mecobalamin) one tablet daily for three months. It is helpful in erectile dysfunction. For further queries consult a sexologist online -->