Is a dose of 25mg of sildenafil safe for a 24-year-old?

The safety of the drug is not determined solely by age. If there are no contraindications, it can be considered that a given patient can use a given drug. However, it is also important whether there is actually such a need. In young men, erection problems are usually associated with psychological factors, such as stress. If erection problems persist, and you suspect that they are not related, for example, to stress, it is worth consulting a doctor. Unfortunately, there is no single answer to how long side effects can last, because if they occur, a lot depends on what ailments they are, how severe, whether they require medical help, etc. I leave a link to the video, which perhaps will better explain the possible effects of the drug: