Further to Karen finding out recently that white Panadol tablets contain a preservative, I have done some investigating and was horrified to find that the brand at the hospital that I work at, Febridol paracetamol, has sulphite preservative in it. This could be a problem for asthmatics admitted to the hospital! Many other brands I looked at also contained sorbates and benzoates as preservatives. Herron tablets are colour free, gluten free and preservative free (see Failsafe Shopping List and Medications factsheet) - from the failsafe group