Behavioral and neuroendocrine responses to sodium lactate infusion in subjects with posttraumatic stress disorder.
OBJECTIVE
Sodium lactate infusion has induced flashbacks accompanied by panic attacks in male combat veterans with posttraumatic stress disorder (PTSD) and concurrent panic disorder. This study addressed whether sodium lactate induces flashbacks or other intrusive PTSD symptoms in PTSD patients free of concurrent panic disorder.


METHODS
Behavioral, cardiovascular, catecholamine, and cortisol responses to infusion of 0.5 M sodium lactate were compared among seven subjects with PTSD without panic disorder, seven subjects with panic disorder only, and seven healthy subjects.


RESULTS
Six of the seven PTSD subjects but no panic disorder or healthy subjects reported flashbacks or other intrusive PTSD symptoms during lactate infusion. Flashbacks were accompanied by substantial anxiety symptoms. Cortisol levels were low in the PTSD subjects.


CONCLUSIONS
Sodium lactate induces flashbacks in persons with PTSD without comorbid panic disorder. The relationship between anxiety responses accompanying a PTSD flashback and those in a panic attack remains unclear.
Jensen
C F
CF
Psychiatry Service, VA Puget Sound Health Care System, Seattle, WA 98108, USA.
Keller
T W
TW
Peskind
E R
ER
McFall
M E
ME
Veith
R C
RC
Martin
D
D
Wilkinson
C W
CW
Raskind
M A
MA
D000328:Adult; D001794:Blood Pressure / Q000187:drug effects*; D015897:Comorbidity; D004837:Epinephrine / Q000097:blood*; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D007262:Infusions, Intravenous; D008297:Male; D008568:Memory / Q000187:drug effects; D008875:Middle Aged; D009638:Norepinephrine / Q000097:blood*; D016584:Panic Disorder / Q000097:blood / Q000139:chemically induced / Q000523:psychology; D019354:Sodium Lactate / Q000008:administration & dosage / Q000494:pharmacology*; D013313:Stress Disorders, Post-Traumatic / Q000097:blood / Q000139:chemically induced* / Q000523:psychology
D019354:Sodium Lactate; D006854:Hydrocortisone; D009638:Norepinephrine; D004837:Epinephrine