If a child has eaten a cannabis edible, treat it as a medical exposure, not a wait and see situation. The most common first symptoms are sleepiness, trouble walking or standing, and confusion, and they often do not appear for 30 minutes to two hours after the child eats. Call Poison Help at 1-800-222-1222 right away, even if the child looks normal, because the amount of THC in one candy, gummy, or brownie can be many times what an adult would take and symptoms can keep building for hours.
Cannabis and Child Accidental Ingestion: Safety Guide
Symptoms to expect, in the order they tend to show up
Young children are small, so the same edible that gives an adult a mild high can cause heavy sedation in a toddler. Parents and caregivers most often describe the first hour as sudden sleepiness, a child who cannot sit up straight, or a child who seems drunk.
Child Cannabis Overdose Signs: What to Look For
Early signs, first 1 to 3 hours
- Extreme drowsiness, hard to keep awake
- Unsteady walking, staggering, falling over
- Slurred speech or no words at all in a talking child
- Confusion, staring, or not responding to their name
- Vomiting or retching
- Dilated pupils, glassy or red eyes
- Fast heartbeat, flushed skin, sweating
- Agitation or crying that does not settle
Later signs, 3 to 12 hours
- Deep sleep that is hard to interrupt
- Slow or shallow breathing
- Low blood pressure and pale or clammy skin
- Seizure activity
- Loss of consciousness
Severe cases in children have included breathing problems, seizures, and coma, which is why a poison center call is the first step rather than a last resort.
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Symptoms that mean call 911 now
Do not drive the child yourself if any of these are present. Call 911 and stay with the child.
- You cannot wake the child, or they wake only briefly
- Breathing is slow, shallow, noisy, or has long pauses
- Lips, tongue, or fingernails look blue or gray
- A seizure happens
- The child cannot hold their head up or sit without support
- Vomiting will not stop
Why edible symptoms differ from smoked cannabis
Swallowed THC moves through the stomach and liver before it reaches the bloodstream, so the delay is longer and the effect lasts longer, sometimes 12 hours or more in a child. The liver also converts THC into a stronger form, so a small body weight plus a delayed, prolonged dose is a bad combination. Add packaging that looks like regular candy, cookies, or chocolate, and a child can eat several pieces before anyone notices.
Option 1: Poison center guided monitoring at home
For a child with mild symptoms only, poison center specialists can often manage the case by phone, telling you what to check and when to head to the hospital.
- Pros: free, staffed 24 hours, staffed by trained toxicology specialists, no travel for mild cases, and they will tell you if the child needs to be seen.
- Cons: only appropriate when symptoms are mild and someone can watch the child without interruption, and symptoms can still worsen hours later, which means a hospital trip may happen anyway.
Best for: a child who is awake, breathing normally, and showing only sleepiness or mild unsteadiness after a small, known exposure.
Option 2: Emergency department evaluation
Emergency care is the right call when breathing, wakefulness, or heart rate are affected, or when the amount eaten is unknown.
- Pros: continuous monitoring, oxygen and breathing support if needed, IV fluids, treatment for seizures, and blood work to rule out other causes.
- Cons: cost and wait time, and the visit is easier for staff if you bring the packaging, which parents do not always have.
Best for: any child under 5 with clear symptoms, any child who is hard to wake, and any child whose breathing looks wrong.
What to do in the first hour
- Call Poison Help at 1-800-222-1222 or 911 if breathing or wakefulness is affected.
- Keep the child in sight and lying on their side if they are sleepy, so vomit cannot block the airway.
- Save the wrapper, label, or a photo of it, plus any leftover pieces.
- Write down the time you found the child and your best guess at how much was eaten.
- Do not make the child throw up.
- Do not give food or drink to a drowsy child.
Prevention that actually works
- Keep edibles in a locked box, not a kitchen drawer or a purse.
- Leave them in the original child resistant packaging with the label on it.
- Do not call them candy, gummies, or treats in front of children.
- Count what you have so you notice what is missing.
- Store them apart from real snacks and drinks.
Bottom line
Sleepiness, unsteady walking, vomiting, and confusion in a child who may have found an edible are reasons to call Poison Help before you see the worst of it. Mild cases can often be watched at home with poison center guidance, while breathing trouble, seizures, or a child you cannot wake need 911. The earlier you call, the more options everyone has.