Ravistin

I’m happy to write a wiki-style article, but I want to be sure I’m describing the correct Ravistin. Could you specify what Ravistin refers to— for example, a chemical substance, a pharmaceutical product, a brand name in a particular country, or something else? If you have a source or field (medicine, chemistry, botany, technology), please share it so I can tailor a concise, neutral article (under 300 words). If you’d prefer, I can also draft a disambiguation-style stub noting multiple possible meanings and request for clarification.