To improve sexual performance, the right medication depends on your specific concerns. For erection difficulties, prescription PDE5 inhibitors like sildenafil (Viagra) or tadalafil (Cialis) are highly effective. If stamina concerns relate to premature ejaculation, doctors may prescribe certain SSRIs (like dapoxetine) or suggest topical numbing creams. However, stamina is often tied to overall cardiovascular health, stress, or hormone levels. I strongly advise avoiding over-the-counter 'male enhancement' supplements, as they are unregulated and can be dangerous. Please consult a healthcare provider to find the safest, most effective treatment for your specific needs.