I am concerned that my son was prescribed a pretty potent medicine that caused side effects, notably in children. When my son awoke unable to talk but coughing, I contacted the advice nurse, and she read off the effects from chlorhexidine gluconate. It appears that the FDA issued an alert about this oral rinse in February 2017, heading below. Fortunately my son's reaction was not so severe as to incapacitate, but it has cost time off school and affected his health.
This was prescribed by Dr. Golinveaux, and as my husband described, it was administered while my son was lying down in the dentists' chair. Dr. Hsieh said that the rinse should be applied only locally, so this technique does not seem to prevent the solution from flowing to the back of the throat and causing irritation. We should have been given these precautions. Moreover, a simple saline rinse over the course of a few days actually took care of the problem, so I think this prescription of a drug with these side effects was just unnecessary.
FDA Drug Safety Communication: FDA warns about rare but serious allergic reactions with the skin antiseptic chlorhexidine gluconate