My son has had several stents in the past and recently one fused and was forcibly removed in hospital resulting in scar tissue damage . He now has another stent following major surgery to remove scar tissue. He has been told to take citravescent. However, we have been told that Citravescent should never be taken with a stent in place as this does indeed form calculxzsus. My son normally takes Japanese Plum Balls (an alkalizer) and this normally keeps him stone free. The information we have been given says that no alkalizers at all should be taken with a stent in place - so now we do not know where we stand or what is the truth. Can you please help us? His condition is Cystinuria and he only has one kidney. He is waiting to have two large stones removed.