I have to laugh now when I go for an MRI and they ask me if I get claustrophobic. After going through 7 weeks of radiation with the mask clamping my head and the lolly pop in my mouth, an MRI doesn't bother me. The treatment was rough, especially after the first 2-3 weeks, as the radiation started to effect my mouth. I just tried to tune out the surroundings, meditate in my mind as best I could. If the situation gets too stressful, I can certainly see asking for medication.