Which of the following is false with regards to propofol
**Core Concept**
Propofol is a short-acting sedative-hypnotic agent used for the induction and maintenance of general anesthesia. It is a phenol derivative that acts on the central nervous system by enhancing the activity of gamma-aminobutyric acid (GABA) at the GABA_A receptor.
**Why the Correct Answer is Right**
Propofol's mechanism of action involves the activation of GABA_A receptors, leading to an increase in the frequency of chloride channel opening, resulting in hyperpolarization of the neuronal membrane and a decrease in neuronal excitability. This effect is mediated by the binding of propofol to the GABA_A receptor's benzodiazepine site. The activation of GABA_A receptors by propofol is responsible for its sedative, hypnotic, and anesthetic effects.
**Why Each Wrong Option is Incorrect**
**Option A:**
- This statement is true, as propofol is indeed a water-soluble emulsion that is typically administered intravenously.
**Option B:**
- This statement is true, as propofol is metabolized by the liver and excreted in the urine.
**Option C:**
- This statement is false, as propofol is known to cause a decrease in blood pressure due to its vasodilatory and negative inotropic effects.
**Clinical Pearl / High-Yield Fact**
It is essential to monitor blood pressure and cardiovascular function closely when administering propofol, especially in patients with cardiovascular disease or those at risk of hypotension.
**Correct Answer:** C. Propofol does not cause an increase in blood pressure.