Raymond Osei works in the part of medicine people most dread raising out loud. Erectile dysfunction arrives wrapped in embarrassment, a pile of internet myths, and a surprising amount of confident nonsense from friends. He began answering reader questions because the same misunderstandings kept costing men either their safety or their results — and often both.
With the PDE5 pills his job is mostly to separate the one true emergency, mixing them with nitrates, from the long list of things people fear that are usually manageable. He is blunt about the hard stop and calm about most of the rest, because that is where the real risk actually sits.
He covers tadalafil, sildenafil and vardenafil here — three drugs that look interchangeable on a shelf and behave quite differently in a life. He spends his words on timing, food, dose, and the interactions that matter. As with every page on this site, his answers are general education, not a treatment plan written for your body.