<prompt> Which of the following is NOT TRUE regarding PROPOFOL?It is used in day care anesthesiaIt is contraindicated in porphyriaCommercial preparation contains egg extractIt does not cause airway irritation  <response>: Propofol is a drug of choice in porphyria as it does not have any role in enzymatic pathways related to it. Sodium thiopental is contraindicated in porphyria as it is an enzyme inducer. Barbiturates promote aminolevulinic acid synthetase, which stimulates the formation of porphyrin an intermediary in heme synthesis. This may precipitate acute intermittent porphyria or variegate porphyria in susceptible individuals. Ref: Morgan Mikhails clinical anesthesiology 6e 