The typical starting dose of Generic cialis for erectile dysfunction (ED) is 10 mg, with potential adjustment to 20 mg or reduction to 5 mg based on individual response and tolerability. Taking 40 mg without medical guidance can increase the risk of side effects like headache, indigestion, or low blood pressure. It's crucial to consult a healthcare provider before adjusting your dosage, as they can recommend the most suitable strength based on your health status and medication interactions. Always follow prescribed guidelines to ensure safe and effective use of Tadalafil for managing ED.