I take Questran on a regular basis on the advice of Professor Read and find it very effective. However twice this year I have been unable to get it from the pharmacy. We have now found that it is available in pharmacies in France. Technically you need a prescription but we have found that if you show them them the empty box they will sell it to you quite happily. Last week we were asked if we wanted one or two boxes!
I thought this information might be useful if others are having similar problems