If you are comparing erectile dysfunction treatments, understanding the dose matters. Vidalista 40 mg is marketed as containing tadalafil, which helps improve blood flow to the penis during sexual stimulation. It can support an erection but does not increase sexual desire. The usual tadalafil dose taken as needed for ED starts at 10 mg and may increase to 20 mg. 40 mg exceeds the usual maximum recommended ED dose, so do not increase your dose without a doctor’s advice. Common side effects include headache, flushing, indigestion, nasal congestion and back pain. Never combine tadalafil with nitrate medicines for chest pain. Seek immediate medical help for chest pain, sudden vision loss or an erection lasting over four hours. Forum experiences can help you prepare questions, but they cannot determine your suitable treatment. Discuss your health and current medicines with a doctor before choosing a dose or changing an existing treatment plan yourself.