<<Disclaimer: Verify this information before applying it to your situation.>> The distributor of Tempanol just called. She said it has no relation to or derivatives from WROB. So, maybe I reacted to something else from the endodontist's office or was just sick from other causes. One writer said there are several options for temporary fillings, so I will enquire when I go again. And someone from Italy kindly offered to make a call to the manufacturer. (The distributor didn't give me the name, but if I think I react to it again I will get it and follow through.) Thanks for your help. Mara