Yes, Viagra (sildenafil) is a common and effective treatment for erectile dysfunction. However, starting directly on the maximum dose of 100mg may not be necessary or safe without a medical evaluation. We typically recommend starting with a lower dose, such as 50mg, to assess how your body responds and to minimize side effects like headaches, flushing, or dizziness. Crucially, Viagra can interact dangerously with certain medications, especially nitrates used for heart conditions. Please consult your doctor first. They will review your cardiovascular health and prescribe the safest, most effective dose for you.