Medical cannabis has been legal in Illinois since 2013. You need to have a physician certify that they are your doctor and that you have one of the qualifying conditions:
Alzheimer's disease Amyotrophic Lateral Sclerosis (ALS) Arnold Chiari malformation Cachexia/wasting syndrome Cancer Causalgia Chronic Inflammatory Demyelinating Polyneuropathy Complex regional pain syndrome type 2 Crohn's Disease Dystonia Fibromyalgia Fibrous dysplasia Glaucoma Hepatitis C HIV/AIDS Hydrocephalus Hydromyelia Interstitial Cystitis Lupus Multiple Sclerosis Muscular Dystrophy Myasthenia Gravis Myoclonus Nail patella syndrome Neurofibromatosis Parkinson's disease Post-traumatic stress Reflex Sympathetic Dystrophy (RSD) Rheumatoid Arthritis Sjogren's syndrome Spinal cord disease Spinocerebellar Ataxia (SCA) Syringomyelia Tarlov cysts Tourette's syndrome Traumatic brain injury and post-concussion syndrome
Home growing is not permitted; you must purchase cannabis from a licensed state dispensary. You are allowed to have 2.5 ounces of marijuana per 14-day period.