<prompt> Which of the following sulphonamides is available as an oral preparation?SulphacetamideSulphadiazineSilver sulphadiazineMafenide  <response>: Sulfadiazine is a sulfonamide which can used orally, as it is rapidly absorbed rapidly excreted. It is 50 plasma protein bound 20-40 acetylated. It has good penetration in CSF brain, therefore used in the treatment of meningitis. Ref: Essentials of Medical Pharmacology, 5th Edition, Pages 641-3 