Efficacy of Internet-delivered Cognitive-behavior Therapy for PTSD

This study is testing whether internet-based cognitive-behavioral therapy (CBT) — a structured talking therapy delivered online — is effective for treating PTSD (post-traumatic stress disorder). Participants complete therapy exercises through a website or app. **You may be eligible if...** - You are 18 or older - You have a current primary diagnosis of PTSD - You can read and communicate fluently in Swedish - You have daily access to a computer or device with internet - Any psychiatric medication you take has been at a stable dose for at least 4 weeks **You may NOT be eligible if...** - Your PTSD is not the main concern requiring treatment right now - Your psychiatric medication was recently started or changed - You have serious mental health conditions like mania, psychosis, active substance use disorder, or current suicide risk - You are currently receiving another trauma-focused therapy - You are still in an ongoing threatening or dangerous situation Talk to your doctor to see if this trial is right for you.