Eiffel is somewhat purist about insisting that functions have no side effects.
This could well be a side-effect of using Ajax, to be fair.
A not insignificant side-effect of the heat loss is that living conditions of northern Europe become endurable.
Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
Bleaching may cause tooth sensitivity, but it's usually a temporary side effect.
Usually, substance abusers will feel anxiety as a side effect of their drug of choice or from withdrawal symptoms.