If you or someone you know experiences a marijuana overdose, you should seek medical attention as soon as possible. Some steps that can be taken to find help are: Call 911 or your local emergency number if the person is unconscious, has trouble breathing, has chest pain, or shows signs of severe mental distress. Contact a poison control center at 1-800-222-1222 for advice on how to handle the situation. Look for a nearby hospital, clinic, or urgent care center that can provide treatment and support. Reach out to a trusted friend, family member, or counselor who can offer emotional support and guidance.