Dehydration is one of the most worrisome complications of diarrhea in children. Mild diarrhea usually doesn't cause significant fluid loss, but moderate or severe diarrhea can. Severe dehydration is dangerous; it can cause seizures, brain damage, even death. Know the signs of dehydration.
Cough and cold medications and decongestants may cause the eyes to dilate. In general, any medication that is a stimulant may cause the eyes to dilate. While it's not particularly common, this could include ADHD medications such as Adderall or Ritalin. Of course, certain illegal drugs do this as well, such as cocaine.
Pupil Dilation And Drug Abuse. Heroin and opioid drugs like morphine and Vicodin cause the pupil of the eyes to constrict. One of the signs of substance abuse with this category of drugs is small pinpoint pupils.The lack of dilation is a possible warning of a serious addiction problem.According to a study in the British Journal of Ophthalmology (1995) there is habituation of the pupils to the drugs.eroin and opioid drugs like morphine and Vicodin cause the pupil of the eyes to constrict. One of the signs of substance abuse with this category of drugs is small pinpoint pupils.