Visine is a useful medication. I use it all the time. When the Santa Ana’s blow in SoCal and the temperature rises, the humidity falls, and eyes dry out, Visine works very well. When used properly it is very safe and effective—-but, if used improperly, it can be a deadly poison.
Actually, anything can be deadly. The difference between a drug and a poison is simply a matter of dose. What can cure, can harm; what can harm, can kill. It’s really that simple.
The active, and dangerous, ingredient in Visine is tetrahydrozoline hydrochloride. If ingested in sufficient amounts, it can cause an elevation in blood pressure, a drop in heart rate, a reduction in body temperature, nausea, vomiting, shortness of breath, blurred vision, seizures, coma, and death, to name a few effects.
The case of Samantha Elizabeth Unger underlines this danger. Seems she poisoned her two children by adding the medication to their juice. And may have done so multiple times—-which could indicate that this is a case of Munchausen Syndrome By Proxy—a psychiatric disorder in which parents harm children in order to garner attention and sympathy. Odd, but not rare.
Recently on Crime and Science Radio, Jan Burke and I interviewed Beatrice Yorker, the Dean of the College of Health and Human Services at California State University, Los Angeles and a renowned expert in Munchausen Syndrome By Proxy. Take a listen and check out some of the links for more info on the fascinating topic.