 This is a 12-week, multicenter, open-label extension study to evaluate the safety and efficacy of TNX-102 SL tablet taken daily at bedtime in patients with Military-Related PTSD or related condition. Patients recruited into this trial are those who have successfully completed the double-blind study, TNX-CY-P201 AtEase Study. Patients will not be made aware of the therapy they received during the double-blind study. 