Yes, there are several alternatives to Zenegra 100 mg for the treatment of erectile dysfunction. The active ingredient in Zenegra is sildenafil, and other medications containing sildenafil as the active ingredient include:

Viagra: The brand-name version of sildenafil, Viagra is one of the most well-known and widely prescribed medications for erectile dysfunction.

Kamagra: Similar to Zenegra 100 mg, Kamagra is a generic version of Viagra that also contains sildenafil.

Revatio: While primarily used to treat pulmonary arterial hypertension, Revatio also contains sildenafil and is sometimes prescribed for erectile dysfunction.

Generic Sildenafil: Various pharmaceutical companies produce generic versions of sildenafil, which may be more affordable than brand-name alternatives.

It's important to note that while these medications share the same active ingredient, there may be differences in formulation, dosage, and other inactive ingredients. Additionally, other classes of medications, such as tadalafil (Cialis) or vardenafil (Levitra), may be considered as alternatives, each with its unique characteristics.