Next week I am starting that clinical trial doing the prophylactic radiation . Even though patients don't know whether we will get total treatment or memory preserving treatment ( it's called hippocampus something I can't ever remember) any way they are offering namenda a drug that delays memory problems caused by radiation (not prevent just delay) but if I receive the preserving treatment this med is totally unnecessary . Does anyone know if this is a good idea or not . Docs say it's up to me but feels like they think it's a good idea. But with this brain stuff I have found them to be a little less willing to offer their opinion than usuall.