PTSD and substance use: why they go together and how treatment works

If you are using alcohol or another substance to manage what feels like PTSD , the hypervigilance, the sleep problems, the intrusive thoughts, the emotional numbness , you are not alone and you are not making a character choice. You are coping with a genuine neurological condition using a method that provides short-term relief and creates long-term problems.

This combination is common in the military community, it is well understood clinically, and it is treatable. This page explains what the research says about why these conditions co-occur so frequently, what effective treatment looks like when both are present, and how to access that treatment in San Antonio.

How common is this combination in veterans?

These numbers reflect the military community broadly. Among combat veterans and those who have experienced military sexual trauma, the rates are even higher. The San Antonio area, with one of the largest active-duty military populations in the country, has significant numbers of veterans and service members navigating this combination.

Why PTSD and addiction develop together

The connection is not coincidence. It is rooted in how both conditions affect the brain’s stress response system.

The self-medication pattern

PTSD produces persistent symptoms , hyperarousal, nightmares, intrusive memories, emotional numbing, and avoidance , that make daily life genuinely difficult. Alcohol suppresses the central nervous system and temporarily reduces hyperarousal. Opioids blunt emotional pain. Cannabis reduces hypervigilance and helps with sleep. Each of these effects is real in the short term.

The problem is that repeated use to manage PTSD symptoms leads to tolerance, dependence, and eventually withdrawal , which produces its own anxiety and physical symptoms that overlap with PTSD. The substance that was providing relief becomes necessary to avoid withdrawal, and the person is now managing two conditions instead of one.

Shared neurobiological pathways

Both PTSD and substance use disorder involve changes to the brain’s stress response system, specifically the amygdala, prefrontal cortex, and HPA axis. Trauma alters how the brain processes threat signals, making the nervous system hyperresponsive. Substance use also alters the same circuits, particularly the dopamine reward system. The two conditions reinforce each other at a neurological level, which is why treating one without addressing the other is consistently less effective.

Avoidance as the common mechanism

PTSD is fundamentally an avoidance disorder , the brain avoids processing the traumatic memory because it is too threatening. Substance use facilitates avoidance. The combination creates a system that is highly resistant to natural recovery because both conditions are maintained by the same avoidance behavior. Effective treatment has to address that avoidance directly.

Signs that both conditions may be present

Recognizing co-occurring PTSD and substance use can be difficult because each condition masks and reinforces the other. Common signs that both may be at play include:

None of these signs alone is diagnostic, but the pattern of using substances specifically to manage what sounds like PTSD symptoms is worth discussing with a clinician.

How treatment works when both conditions are present

The research is consistent: treating PTSD and substance use disorder simultaneously produces better outcomes than treating them one at a time. The old sequential model , get sober first, then address the trauma , is less effective because untreated PTSD drives relapse during and after substance use treatment.

Effective integrated treatment addresses both conditions in parallel, typically through a combination of trauma-focused therapy, relapse prevention, and sometimes medication.

Accessing treatment in San Antonio

San Antonio has significant resources for veterans and service members with co-occurring PTSD and substance use, both through the military health system and through civilian providers.

Through TRICARE and the military health system

Active-duty service members at JBSA are covered under TRICARE Prime with no cost-sharing. For mental health and substance use care, the starting points are the branch substance abuse programs , Army ASAP at Fort Sam Houston, Air Force ADAPT at Lackland and Randolph. These programs assess co-occurring conditions and can refer to integrated treatment within the military health system or to TRICARE-contracted civilian providers.

The San Antonio Military Medical Center (SAMMC) at Fort Sam Houston provides inpatient behavioral health services including treatment for co-occurring conditions. Wilford Hall Ambulatory Surgical Center at Lackland also has mental health resources. If the level of care you need is not available at an MTF, your branch program coordinates a TRICARE-covered referral to a civilian dual diagnosis program.

Through the VA

Veterans with VA eligibility can access substance use disorder and PTSD treatment through the South Texas Veterans Health Care System, with the main campus in San Antonio. The VA’s Mental Health Residential Rehabilitation Treatment Program (MHRRTP) provides residential treatment for veterans with co-occurring conditions including PTSD and substance use. This care is provided at no cost to eligible veterans with VA healthcare enrollment.

VA PTSD specialty care clinics offer CPT, Prolonged Exposure, and group therapy adapted for veterans. The VA’s substance use disorder program coordinates with PTSD specialty care for integrated treatment. To access VA care, contact the South Texas Veterans Health Care System at 210-617-5300 or visit their San Antonio campus.

Civilian TRICARE-covered providers

Several civilian treatment programs in and around San Antonio provide dual diagnosis care and accept TRICARE. Prior authorization is required for inpatient and residential levels. Verify any facility’s TRICARE network status with TriWest at 1-888-874-9378 before admission. Our treatment centers directory lists local facilities and their TRICARE status.

What to say when you call for help

One barrier to getting appropriate treatment is not knowing how to describe what is happening. When you call TRICARE, the VA, or a treatment facility, the following framing helps ensure you are directed to the right level of care:

Tell them you are experiencing both trauma-related symptoms , nightmares, hypervigilance, intrusive memories , and that you have been using substances to manage those symptoms. Ask specifically whether they provide dual diagnosis or co-occurring disorder treatment that addresses both PTSD and substance use at the same time. Ask whether they have experience treating veterans or active-duty service members.

If a program tells you that you need to be completely sober before they will address the trauma, that is the old sequential model. Evidence-based care for co-occurring conditions does not require you to be sober before discussing what happened. You can ask for a second opinion or a referral to a program that provides integrated care.

A note on confidentiality for active-duty members

Active-duty service members often worry that seeking mental health or substance use treatment will affect their career or security clearance. The confidentiality rules differ depending on how you access care. See our full guide on self-referral vs command notification at JBSA for a complete explanation of what your command is notified about and what stays between you and the treatment provider.

The general principle: voluntarily seeking treatment through your branch’s substance abuse program , ASAP, ADAPT, or SARP , before a conduct incident is treated very differently from being command-referred after an incident. And DCSA adjudicative guidelines for security clearances explicitly list voluntary treatment as a mitigating factor, not a disqualifying one.