Wiktionary
overreactive
a. Too reactive; tending to overreact. alt. Too reactive; tending to overreact.
Usage examples of "overreactive".
They are buried alive and come forth later in uglier ways—in overreactive comments, in anger, in violent verbal or physical expressions, in psychosomatic illnesses, in giving people the silent treatment, in extreme statements or judgments, or in simply acting out in other dysfunctional and hurtful ways.
They don’t have to become impatient and overreactive because they know that their time to be heard and understood will come.