- AIDS
- Amyotrophic lateral sclerosis
- Alzheimer’s disease
- Cancer
- Chronic traumatic encephalopathy
- Crohn’s disease
- Epilepsy or another seizure disorder
- Fibromyalgia
- Glaucoma
- Hepatitis C
- Inflammatory bowel disease
- Multiple sclerosis
- Pain that is either chronic and severe or intractable
- Parkinson’s disease
- Positive status for HIV
- Post-traumatic stress disorder
- Sickle cell anemia
- Spinal cord disease or injury
- Tourette’s syndrome
- Traumatic brain injury
- Ulcerative colitis.