Definition of hoax. 1  transitive verb. : 2  to trick into believing or accepting as genuine something false and often preposterous were hoaxed by the website.
Attention deficit hyperactivity disorder (ADHD) is a disorder that affects behavior. A recent national study reported by the CDC noted that 11% of school aged children are being diagnosed with ADHD. Three main symptoms define ADHD including inattention, hyperactivity, and impulsivity.
Side Effects. Dextromethorphan (DXM) overdose symptoms can occur when the medication is overused, and some symptoms overlap with the normal side effects of the medication. Regular and expected side effects that may occur in patients include: 1  Dizziness. 2  Nervous behavior. 3  Drowsiness. 4  Vomiting. 5  Stomach pain. 6  Nausea. 7  Lightheadedness.