Health officials in Connecticut are urging parents and caregivers to secure over-the-counter medications following a rise in reports of adolescent misuse linked to social media trends. The Connecticut Department of Consumer Protection warns that intentional overdoses of antihistamines like diphenhydramine—commonly sold as Benadryl—can cause life-threatening heart rhythm disturbances, seizures, and respiratory failure.
Why Diphenhydramine Misuse Is Dangerous
Diphenhydramine is a first-generation antihistamine used to treat allergies and insomnia. While it is safe at recommended therapeutic doses, it possesses a narrow therapeutic index, meaning the margin between a helpful dose and a toxic one is small. According to the American Academy of Pediatrics, consuming excessive amounts of the drug can lead to anticholinergic toxicity. Symptoms of this condition include rapid heart rate (tachycardia), hallucinations, severe agitation, and, in extreme cases, cardiac arrest.

Physicians emphasize that teenagers often underestimate the physiological impact of these medications, mistakenly viewing them as "safer" because they are available without a prescription.
The Role of Social Media Challenges
The recent surge in hospitalizations is frequently attributed to the "Benadryl Challenge," a social media trend that encourages users to consume large quantities of the medication to induce hallucinations. Data from the National Poison Data System indicates that calls to poison control centers regarding intentional diphenhydramine misuse among adolescents have seen significant fluctuations over the past few years.
While social media platforms have updated their community guidelines to remove content promoting self-harm or the misuse of regulated substances, medical professionals note that these trends often resurface under different hashtags or viral formats. The U.S. Food and Drug Administration (FDA) has previously issued warnings to the public and healthcare providers about the risks of these challenges, noting that even small increases in dosage can have catastrophic results for young people.
Preventing Accidental and Intentional Overdose
Public health experts recommend several proactive steps to protect adolescents and children:

- Lock and Secure: Store all medications, including over-the-counter allergy pills, in a locked cabinet or a secure container that is not easily accessible to children or teens.
- Monitor Inventory: Keep track of the quantity of medication in your home. If you notice a bottle is depleting faster than expected, it may indicate misuse.
- Open Communication: Discuss the dangers of medication misuse with teenagers. Frame the conversation around the biological risks rather than just the social media trend itself.
- Proper Disposal: Use drug take-back programs or authorized collection sites to dispose of expired or unused medications rather than keeping them in the home.
Understanding the Risks: A Quick Reference
| Symptom | Clinical Significance |
|---|---|
| Tachycardia | Rapid heart rate caused by autonomic nervous system disruption. |
| Hallucinations | Sign of central nervous system toxicity. |
| Seizures | Severe neurological response to overdose. |
| Cardiac Arrhythmia | Potentially fatal disruption of the heart’s electrical activity. |
If you suspect someone has ingested an excessive amount of medication, contact the National Poison Control Center immediately at 1-800-222-1222 or seek emergency medical care. Early intervention is the most critical factor in preventing permanent injury or death from antihistamine toxicity.