Vidalista 40 mg often takes 30 to 60 minutes to start treating erectile dysfunction. You can take it once daily, at least 30 minutes prior to your desired sexual activity. Vidalista 40 mg by itself is insufficient to elicit an erection. For it to operate, you must be sexually stimulated. Some men experience minor adverse effects from Vidalista 40 mg , however, the majority of men do not. These could include dyspepsia, face flushes, back discomfort, muscle aches, arm and leg pain, and headaches. If you also use nitrate-containing medications, avoid taking Vidalista 40 mg (often prescribed for chest pain).