Cannabis Use Disorder in Veterans — Risks & Treatment

Cannabis use disorder (CUD) affects approximately 9.2% of veterans lifetime. CUD diagnoses within the VA system more than doubled from 2005 to 2019. The veteran population faces unique risks: 72% of OEF/OIF/OND veterans with CUD have comorbid PTSD, and 70% have chronic pain. This is not a moral failing — it is a real clinical condition with evidence-based treatment.

Prevalence in Veterans

Key prevalence data from the 2019–2020 National Health and Resilience in Veterans Study (NHRVS):

• Lifetime CUD prevalence: approximately 9.2% of veterans
• Past-6-month CUD: 2.7%
• Past-6-month cannabis use: 11.9%
• Therapeutic cannabis use: approximately 41% (more than double the general population rate)

CUD diagnoses within the VHA system more than doubled from 2005 to 2019. Disproportionately greater increases were observed among veterans with psychiatric disorders compared to those without — reflecting the concentration of CUD in veterans with comorbid conditions.

The Comorbidity Pattern

Among OEF/OIF/OND veterans with CUD:

• 72.3% had comorbid PTSD
• ~70% had a chronic pain diagnosis
• ~56.8% had comorbid nicotine use disorder
• ~40.1% had comorbid alcohol use disorder
• ~14.0% had comorbid cocaine use

Over half of veterans with CUD had another substance use disorder. The CUD-PTSD connection is particularly strong and reflects a well-documented self-medication pattern.

The Self-Medication Feedback Loop

Veterans with PTSD use cannabis predominantly to cope with negative affect, manage sleep problems, and reduce situational anxiety. Veterans using cannabis specifically for PTSD self-medication reported:

• Greater combat exposure (d=0.56)
• More PTSD symptoms (d=1.02)
• More frequent cannabis use compared to recreational users

This creates a negative reinforcement cycle where short-term symptom relief drives increasing dependence. As tolerance develops, higher doses are needed to achieve the same relief, and withdrawal symptoms on abstinence produce worsened baseline symptoms that reinforce continued use. This is the classic signature of a developing substance use disorder.

DSM-5 Criteria for Cannabis Use Disorder

CUD is diagnosed when a person meets 2 or more of 11 criteria within a 12-month period. The criteria include:

• Cannabis used in larger amounts or for longer than intended
• Persistent desire or unsuccessful efforts to cut down
• Significant time spent obtaining, using, or recovering from cannabis
• Craving
• Failure to fulfill major obligations due to use
• Continued use despite social/interpersonal problems
• Important activities given up or reduced
• Use in physically hazardous situations
• Continued use despite physical or psychological problems
• Tolerance (needing more for same effect)
• Withdrawal symptoms (irritability, anxiety, sleep problems, appetite changes)

Severity: 2–3 criteria = mild; 4–5 = moderate; 6+ = severe.

Cannabis Withdrawal Is Real

DSM-5 formally recognized cannabis withdrawal in 2013. Symptoms typically begin within 1–2 days of cessation, peak at 2–6 days, and resolve over 1–3 weeks. Common symptoms include:

• Irritability, anger, aggression
• Anxiety, restlessness
• Sleep difficulty, strange/vivid dreams (REM rebound)
• Decreased appetite, weight loss
• Depressed mood
• Physical symptoms: headaches, sweating, chills, tremors, abdominal pain

For veterans with PTSD, cannabis withdrawal can temporarily worsen PTSD symptoms, making the first 1–2 weeks of cessation particularly difficult. This is biological, not character weakness. It resolves.

VA Treatment Approaches

VA offers evidence-based SUD treatments including:

Cognitive Behavioral Therapy (CBT)

The most researched treatment approach for CUD. Helps veterans identify use triggers, develop coping strategies, and address thinking patterns that drive use. Available through VA SUD programs at all medical centers.

Motivational Enhancement Therapy (MET)

Brief intervention focused on resolving ambivalence about change. Often combined with CBT. Particularly effective for veterans who are not yet committed to cutting back.

Contingency Management

Prize-based incentive program operating at 100+ VA medical centers with over 6,300 veterans treated since 2011. Veterans earn prizes or vouchers for verified abstinence (typically via urine drug screens). Over 90% of approximately 82,000 urine samples collected under this program have tested negative. This is one of the most effective CUD treatments documented in any healthcare system.

Seeking Safety

Integrated treatment designed for co-occurring PTSD and substance use disorder. Evidence base is strong for veterans with trauma histories.

No FDA-Approved Medications

There are no FDA-approved medications for cannabis use disorder. This is in contrast to alcohol use disorder (naltrexone, acamprosate, disulfiram) and opioid use disorder (buprenorphine, methadone, naltrexone). Ongoing research is examining candidates including N-acetylcysteine, gabapentin, and FAAH inhibitors, but none have FDA approval for CUD.

VA Does Not Require Abstinence for PTSD Treatment

This is worth emphasizing. The VA explicitly does not require cannabis abstinence before providing PTSD treatment. The VA states that patients with comorbid PTSD and SUD "do not need to wait for a period of abstinence before addressing their PTSD." This is clinically important because:

• Abstinence-first models often fail for veterans with severe PTSD
• PTSD symptoms typically drive substance use; treating PTSD often reduces use
• Trauma-focused psychotherapy can work even in the context of ongoing cannabis use
• Forcing abstinence as a precondition can deter veterans from seeking any treatment

Lower-Risk Cannabis Use

For veterans who are not ready to quit but want to reduce harm, the Fischer et al. lower-risk guidelines apply. Key principles include: abstinence is the only way to eliminate risk; avoid high-potency THC products; prefer non-smoking routes; limit frequency; avoid driving while impaired; avoid use if at higher risk for psychosis. Full lower-risk guidelines.

What This Means for Veterans

• CUD is common in veterans and is not a moral failing.
• VA offers free, evidence-based treatment. Engage early — earlier intervention produces better outcomes.
• You do not need to quit before getting PTSD treatment.
• Cannabis withdrawal temporarily worsens baseline symptoms — but it resolves within 1–3 weeks.
• Contingency management is remarkably effective. Ask your VA SUD team if it is available at your facility.
• If you are in crisis, call 988, then press 1.

Related Reading

• Cannabis & PTSD
• CUD Treatment Options
• Cutting Back Strategies
• Lower-Risk Use Guidelines