Delayed Effects and Accidental Overconsumption of Edibles

What to do first (United States)

• Call Poison Help: 1-800-222-1222. It is free, confidential and open 24 hours, online or by phone. [1]
• Call 911 if there is an immediate danger to health. [2]
• For a child: the FDA says that if a parent or caregiver reasonably suspects a child ate a product containing cannabis, the child should be taken to a physician or emergency department, especially if the child acts in an unusual way or feels sick. [3]
• Other countries: see Poison Help by Country. We have not verified emergency numbers outside the United States for this page.
• Pets: see Accidental Child and Pet Exposure. Human and veterinary guidance are different; ask a veterinarian or animal poison service.

This page is information only and does not replace emergency care. It gives no home treatments, because we found none in the regulator and poison-center sources we read.

Why effects arrive late and vary

When THC is swallowed in food or drink, absorption is slower: onset in 30 to 90 minutes, longer-lasting effects, and often no peak until about 3 hours, with timing highly variable. [1] NIDA says edibles typically take longer to show effects, so people may use more and raise the likelihood of serious negative effects. [4] A systematic review found highly variable oral THC absorption, with more variability in baked goods and oils. [5] Evidence label: established.

What too much can look like in adults

• Anxiety, fear, distrust, panic or hallucinations are more common after a large amount, a high-THC product, or little experience. [4]
• Poison Control lists fast heart rate, impaired coordination, trouble with problem-solving and forgetfulness. [1]
• In FDA adverse event reports on delta-8 THC products, events included hallucinations, vomiting, tremor, anxiety, dizziness, confusion and loss of consciousness. [2]

See also Anxiety, Panic and Paranoia Reactions and When to Seek Urgent Help After Cannabis Use.

Children

• Among people made ill by accidental exposure to THC candies, children generally had more severe symptoms than adults and stayed in the hospital longer. [6]
• In a narrative review, THC effects in children typically emerged within 2 hours and more severe symptoms within 4 hours. [7]
• Among U.S. poison-center exposures to delta-8 THC products (2,362 cases), 40% were unintentional, and 82% of those affected pediatric patients; one pediatric case was coded with a death outcome. [2]
• In California, most child cannabis exposures needing medical attention (2010 to 2020) happened at home from edibles, often packaged to look like popular candy and snack brands. [8]

Child-resistant storage and packaging

• The FDA recommends keeping cannabis products out of reach of children. [3]
• Poison Control advises that anyone in a household using medical cannabis, especially in "food" or "candy" form, should keep it locked away and well out of reach of children. [1]
• Canada requires the immediate container of a cannabis product to meet child-resistant package requirements (read 2026-10-22). [9] Rules elsewhere vary, and laws change; this is not legal advice.
• The FDA and FTC warned companies about THC foods that can easily be mistaken for chips, cookies, candy or gummies. [10]

An overview of the edible category is on THC Edibles: Educational Guide. More on children and teens: Children & Teens.