I must admit this is fascinating research that researchers at MIT have honed in on Tet1, as it appears that gene is the door to terrible memories, and that maybe one day a pill (with therapy) could block that memory. But I am not sure how healthy it is to have memories blocked out of our mind by medication. I think it is different if the brain has blocked out memories as a way to cope.
A therapy that I have found useful for dealing with traumatic memories, and decreasing their potency is EMDR.