Vape stays in the blood for around a day or three (3) days in the case of nicotine and up to ten (10) days in the case of cotinine .
cotinine
Cotinine is currently being studied as a treatment for depression, PTSD, schizophrenia, Alzheimer's disease and Parkinson's disease. Cotinine was developed as an antidepressant as a fumaric acid salt, cotinine fumarate, to be sold under the brand name Scotine but it was never marketed.
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