Zenegra 100 mg, like Vigora 100 mg, contains sildenafil citrate and is primarily used to treat erectile dysfunction in adult males. Whether it's suitable for young adults depends on various factors, including the individual's overall health, medical history, and any other medications they may be taking.

In general, sildenafil medications like Zenegra 100 mg are not typically prescribed for young adults who don't have erectile dysfunction. However, there may be exceptions in certain cases where a healthcare provider determines it's appropriate, such as for the treatment of pulmonary arterial hypertension in younger patients.

It's crucial for young adults to consult with a healthcare professional before using Zenegra 100 mg or any similar medication to ensure it's safe and appropriate for their specific situation. Self-medication with erectile dysfunction drugs without proper medical guidance can be risky and may lead to adverse effects or interactions with other medications.