Besides passwords, I know EMDR is basically an attempt at an antimemetic for PTSD. However, one thing I’ve wondered about that therapy is how effective it is at also reducing the behaviors of PTSD.
I had almost total disassociative amnesia after sexual abuse by an older friend in elementary school, possibly Jr High. While I remembered the friend, I still don’t really remember the abuse and know about it until my parents warned me about this person moving back while I was in high school. However, I was still very sensitive regarding any nudity (even with sexual partners) and personal space until I spent some time with a therapist.
I think the memories of the abuse were truly gone and not repressed, recovery of repressed memories seems to be pseudoscience. However, it doesn’t seem implausible to lose only the episodic memory of the trauma.