If you put a drug into the GIT... Yep. That's for intestinal tract. And you've got explosive diaries. It's having a much time to be absorbed. So that's kind of where it comes into. The route or route of administration depends on the... will alter the concentration of the drug at the point in which it gets into the systemic circulation. If you do IV intravenous, well, that's closer to the arterial system. So it's faster to hit its peak concentration in thearterial system. Okay. Last one I've got is contact time. So how long is it available to do all these things? All right. Cool.