Never heard of that one. I would ask them why they would change a binder without telling you about it first and why it needs to be changed.
Local GP sent us a script yesterday for a different binder, apparently hospital has changed it. Have been on Renegel for about a year and doing ok they have changed it with out telling us to Phosex. Whats this one like? I told my husband not to take it until he has had a word with his neph.