ketina

Could you clarify what you mean by "ketina"? There is no widely recognized topic by that exact name in standard reference sources. It could be a misspelling of ketamine, a fictional term, a brand name, a geographic or cultural reference, or a term used in a specific field. Please provide the intended context (field or region) or any sources you want referenced, and I can draft a concise, neutral wiki-style article (under 300 words). If you’d prefer, I can also create a stub entry treating ketina as a placeholder concept.