<s>[INST] I had a panic attack last night, associated with my dx of PTSD, from military service. While trying to go back to sleep as I was drifting off I would wake up as I felt I had stopped breathing. Is that possible. Those sensations lasted for another 45 minutes. [/INST] Degree understand your concerns went through your details. I suggest you not to worry much.  Panic attacks always happen due to underlying anxiety. Therefore, you must add Chat Doctor.  Please understand anxiety and related problems. Once you understand your anxiety, you will be able to keep yourself away from panic creating situations. Therapy always starts with avoiding such situations along with coping techniques when forced to be in such situations. Start slowly, progress gradually, attain neatly. You should know that these problems are not mental diseases, but are mental disorders. Many researches and researchers confirm that medicines alone cannot cure mental disorders. Lifestyle changes, change in thinking pattern, relaxation etc. are as essential as medicines. Psychotherapy can help you to change your lifestyle and thinking patterns. Yoga and meditation help you to streamline your metabolism and neurological balance. Please consult a psychologist for further information. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck. </s>