Doctors are urging parents to keep a close eye on medications in their homes after three children in Connecticut recently died following exposure to the active ingredient found in Benadryl.

Medical experts believe the incidents may be connected to the resurfacing of the so-called "Benadryl Challenge," a dangerous social media trend that encourages participants to take excessive amounts of the allergy medication in an attempt to experience hallucinations or get high.

The challenge gained attention several years ago and involves taking doses far beyond the recommended amount.