What causes drowsiness diprivan or propofol?

Same medication! Diprivan is the trademarked name for the medication propofol. They are the same medication. Propofol causes the rapid onset of drowsiness in low doses and sleep in higher doses. It can be used for sedation or to induce general anesthesia. Because it can slow or stop breathing, it must be used only by an anesthesiologist or by personnel trained in anesthesia administration.
Diprivan/propofol. Diprivan is the trade name for the generic propofol. This drug is used in sedation and general anesthesia as such is utilized to prevent awareness during various surgical procedures.