As of 2015, there is no evidence that alcohol increases or decreases the effects of Zyrexin. There are no known interactions between butea superba, which is the active ingredient of Zyrexin, and other substances, according to WebMD.
Zyrexin is used to enhance sexual performance and is advertised as a treatment for erectile dysfunction. There is insufficient evidence to evaluate Zyrexin for these uses, but there are anecdotal reports of its efficacy, WebMD says. Butea superba is a plant that is grown in India and Southeast Asia. It is also used for urinary problems, fever and diarrhea. It is not known how it acts to enhance sexual performance.